Develop Reference

Mock flatMap ServerResponse Body in Spring Webflux

I am running a Spring Webflux application, as such I am using flatMap to convert my request body. I have a Router that looks like this,
#Configuration
public class TallyRouter {
private static final String TALLY_BASE_URL = "/admin/tally";
private static final String TALLY_ID_URL = "/{tallyId}";
#Bean
RouterFunction<ServerResponse> tallyRoutes(tallyHandler handler) {
return RouterFunctions.route(GET(TALLY_CONFIG_BASE_URL + "/active"), handler::getActiveTally)
.andRoute(POST(TALLY_BASE_URL).and(accept(MediaType.APPLICATION_JSON)), handler::createTally);
}
My handler class looks like this,
#Component
#RequiredArgsConstructor
public class TallyHandler {
#Autowired
TallyService tallyService;
private static final Logger logger = LogManager.getLogger(TallyHandler.class);
public Mono<ServerResponse> createTally(ServerRequest request) {
Mono<NewTallyRequest> req = request.bodyToMono(NewTallyRequest.class);
return req
.doOnNext(result -> logger.info(result))
.flatMap(a -> ServerResponse.ok().contentType(MediaType.APPLICATION_JSON)
.body(tallyService.createTally(a, request.exchange()), String.class)); // the line of the code that is null
}
}
This is how my test looks like,
#ExtendWith(MockitoExtension.class)
#WebFluxTest
#ContextConfiguration(classes = { TallyHandler.class, TallyRouter.class })
#ActiveProfiles("test")
class TallyHandlerTest {
#MockBean
WebClient webClient;
#MockBean
TallyService tallyService;
#Autowired
private ApplicationContext context;
WebTestClient webTestClient;
MockWebServer mockWebServer;
String res = "testRes";
#BeforeEach
void before() throws IOException {
webTestClient = WebTestClient.bindToApplicationContext(this.context).configureClient().build();
mockWebServer = new MockWebServer();
mockWebServer.start();
}
#AfterEach
void tearDown() throws IOException {
mockWebServer.close();
}
#Test
#WithMockUser(roles = "ADMIN")
void createTallyTest_200() {
String url = "/admin/tally";
MockResponse mockedResponse = new MockResponse().setStatus("200").setBody(res);
mockWebServer.enqueue(mockedResponse);
NewTallyRequest req = new NewTallyRequest();
req.setIsActive(isActive);
when(tallyService.createTally(req, exchange)).thenReturn(Mono.just(res));
webTestClient.mutateWith(csrf()).post().uri(uriBuilder -> uriBuilder.path(url).build())
.body(BodyInserters.fromValue(req)).exchange().expectStatus().is2xxSuccessful();
}
}
Error:
java.lang.IllegalArgumentException: 'publisher' must not be null
at org.springframework.util.Assert.notNull(Assert.java:201)
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
*__checkpoint ⇢ org.springframework.security.web.server.authorization.AuthorizationWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.web.server.authorization.ExceptionTranslationWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.web.server.authentication.logout.LogoutWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.web.server.savedrequest.ServerRequestCacheWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.web.server.context.SecurityContextServerWebExchangeWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.web.server.ui.LogoutPageGeneratingWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.web.server.ui.LoginPageGeneratingWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.web.server.authentication.AuthenticationWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.web.server.authentication.AuthenticationWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.web.server.context.ReactorContextWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.web.server.csrf.CsrfWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.web.server.header.HttpHeaderWriterWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.config.web.server.ServerHttpSecurity$ServerWebExchangeReactorContextWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.web.server.WebFilterChainProxy [DefaultWebFilterChain]
*__checkpoint ⇢ org.springframework.security.web.server.csrf.CsrfWebFilter [DefaultWebFilterChain]
*__checkpoint ⇢ HTTP POST "/admin/tally" [ExceptionHandlingWebHandler]
Original Stack Trace:
at org.springframework.util.Assert.notNull(Assert.java:201)
at org.springframework.web.reactive.function.BodyInserters.fromPublisher(BodyInserters.java:182)
at org.springframework.web.reactive.function.server.DefaultServerResponseBuilder.body(DefaultServerResponseBuilder.java:233)
at my.company.app.handler.TallyHandler.lambda$1(TallyHandler.java:58)
I have tried to mock the return value of the tallyService but the test is not picking it up in the body of ServerResponse. What should I do to mock that part of the code to return a correct ServerResponse value?

I finally found the answer to this problem, I didn't mock the body properly.
I was doing this,
when(tallyService.createTally(req, exchange)).thenReturn(Mono.just(res));
when I should be doing this,
when(tallyService.createTally(any(NewTallyRequest.class), any(ServerWebExchange.class)).thenReturn(Mono.just(res));
The body of the ServerResponse entity wasn't mocked hence I was faced with the error of returning an empty body.

Webflux returning cors error on Access denied

#Bean
public SecurityWebFilterChain securityWebFilterChain(
ServerHttpSecurity http,
ReactiveAuthenticationManager jwtAuthenticationManager,
ServerAuthenticationConverter jwtAuthenticationConverter
) {
AuthenticationWebFilter authenticationWebFilter = new AuthenticationWebFilter(jwtAuthenticationManager);
authenticationWebFilter.setServerAuthenticationConverter(jwtAuthenticationConverter);
return http
.addFilterAt(authenticationWebFilter, SecurityWebFiltersOrder.AUTHENTICATION)
.securityMatcher(
new NegatedServerWebExchangeMatcher(
new OrServerWebExchangeMatcher(
ServerWebExchangeMatchers.pathMatchers(ALLOWED_URLS.toArray(new String[0])),
ServerWebExchangeMatchers.pathMatchers(HttpMethod.OPTIONS, "/**")
)
)
)
.httpBasic()
.disable()
.csrf()
.disable()
.formLogin()
.disable()
.logout()
.disable()
.exceptionHandling()
.authenticationEntryPoint((exchange, e) -> {
if (e.getCause() instanceof AccessDeniedException) {
throw new ForbiddenException(e);
}
throw new UnauthorizedException(e);
})
.and()
.authorizeExchange()
.pathMatchers("/api/auth/password").hasAnyRole(RolesList.SUPER_ADMIN.name(), RolesList.ADMIN.name())
.pathMatchers("/api/client/**").hasRole(RolesList.SUPER_ADMIN.name())
.pathMatchers("/api/user/**").hasRole(RolesList.SUPER_ADMIN.name())
.pathMatchers("/api/**").authenticated() //entire server side app will be kept here
.anyExchange().authenticated()
.and()
.build();
}
#Configuration
#EnableWebFlux
public class CorsGlobalConfiguration implements WebFluxConfigurer {
private final NetworkProperties networkProperties;
public CorsGlobalConfiguration(NetworkProperties networkProperties) {
this.networkProperties = networkProperties;
}
#Override
public void addCorsMappings(CorsRegistry registry) {
registry.addMapping("/api/client/search")
.allowedOrigins(networkProperties.getAllowedOrigins())
.allowedMethods("POST", "OPTIONS");
}
}
Above are my spring security config and cors config.
When super admin accessing /api/client/search he is getting success response.
But when admin is trying to access he is getting Cors error instead of access denied.
What am i missing here?
Below is the exception stack trace which very strange according to exception my exception handler is creating response but browser displaying cors error instead of Access denined.
Again same thing is working fine for super admin
com.adminpanel.api.common.exceptions.ForbiddenException: Forbidden
at com.adminpanel.api.auth.config.SecurityConfig.lambda$securityWebFilterChain$0(SecurityConfig.java:81)
Suppressed: org.springframework.security.access.AccessDeniedException: Access Denied
at org.springframework.security.authorization.ReactiveAuthorizationManager.lambda$verify$1(ReactiveAuthorizationManager.java:53)
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
|_ checkpoint ⇢ org.springframework.security.web.server.authorization.AuthorizationWebFilter [DefaultWebFilterChain]
Stack trace:
at org.springframework.security.authorization.ReactiveAuthorizationManager.lambda$verify$1(ReactiveAuthorizationManager.java:53)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:44)
at reactor.core.publisher.Mono.subscribe(Mono.java:4252)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:75)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:160)
at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onComplete(FluxDefaultIfEmpty.java:99)
at reactor.core.publisher.MonoNext$NextSubscriber.onComplete(MonoNext.java:96)
at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:77)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:274)
at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:851)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1812)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:241)
at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onNext(FluxDefaultIfEmpty.java:93)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:121)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1812)
at reactor.core.publisher.MonoAny$AnySubscriber.onComplete(MonoAny.java:130)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onComplete(FluxMapFuseable.java:144)
at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.drainAsync(FluxFlattenIterable.java:334)
at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.drain(FluxFlattenIterable.java:679)
at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.onComplete(FluxFlattenIterable.java:260)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onComplete(FluxFilterFuseable.java:165)
at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onComplete(FluxMapFuseable.java:336)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onComplete(FluxFilterFuseable.java:384)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1795)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:144)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onNext(FluxFilterFuseable.java:112)
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2393)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.request(FluxFilterFuseable.java:184)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:103)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onSubscribe(FluxFilterFuseable.java:81)
at reactor.core.publisher.MonoCurrentContext.subscribe(MonoCurrentContext.java:35)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150)
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:114)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onNext(FluxFilter.java:107)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67)
at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:76)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onNext(FluxFilter.java:107)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.tryEmitScalar(FluxFlatMap.java:481)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onNext(FluxFlatMap.java:414)
at reactor.core.publisher.FluxIterable$IterableSubscription.slowPath(FluxIterable.java:267)
at reactor.core.publisher.FluxIterable$IterableSubscription.request(FluxIterable.java:225)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onSubscribe(FluxFlatMap.java:364)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:161)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86)
at reactor.core.publisher.Mono.subscribe(Mono.java:4252)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:441)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:211)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:161)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1812)
at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onComplete(FluxDefaultIfEmpty.java:101)
at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:136)
at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:136)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:160)
at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onComplete(FluxMap.java:262)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1813)
at reactor.core.publisher.MonoCacheTime$CoordinatorSubscriber.signalCached(MonoCacheTime.java:320)
at reactor.core.publisher.MonoCacheTime$CoordinatorSubscriber.onNext(MonoCacheTime.java:337)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:192)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67)
at reactor.core.publisher.FluxSubscribeOnCallable$CallableSubscribeOnSubscription.run(FluxSubscribeOnCallable.java:249)
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:68)
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:28)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
|_ checkpoint ⇢ org.springframework.security.web.server.authorization.ExceptionTranslationWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.savedrequest.ServerRequestCacheWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.context.SecurityContextServerWebExchangeWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.authentication.AuthenticationWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.context.ReactorContextWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.header.HttpHeaderWriterWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.config.web.server.ServerHttpSecurity$ServerWebExchangeReactorContextWebFilter [DefaultWebFilterChain]
|_ checkpoint ⇢ org.springframework.security.web.server.WebFilterChainProxy [DefaultWebFilterChain]
|_ checkpoint ⇢ HTTP POST "/api/client/search" [ExceptionHandlingWebHandler]
Stack trace:
at com.adminpanel.api.auth.config.SecurityConfig.lambda$securityWebFilterChain$0(SecurityConfig.java:81)
at org.springframework.security.web.server.authorization.ExceptionTranslationWebFilter.commenceAuthentication(ExceptionTranslationWebFilter.java:72)
at org.springframework.security.web.server.authorization.ExceptionTranslationWebFilter.lambda$filter$1(ExceptionTranslationWebFilter.java:44)
at reactor.core.publisher.Mono.lambda$onErrorResume$31(Mono.java:3401)
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:88)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onError(Operators.java:2059)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onError(MonoFlatMap.java:165)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onError(Operators.java:2059)
at reactor.core.publisher.Operators.error(Operators.java:196)
at reactor.core.publisher.MonoError.subscribe(MonoError.java:52)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
at reactor.core.publisher.Mono.subscribe(Mono.java:4252)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:75)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:160)
at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onComplete(FluxDefaultIfEmpty.java:99)
at reactor.core.publisher.MonoNext$NextSubscriber.onComplete(MonoNext.java:96)
at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:77)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:274)
at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:851)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1812)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:241)
at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onNext(FluxDefaultIfEmpty.java:93)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:121)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1812)
at reactor.core.publisher.MonoAny$AnySubscriber.onComplete(MonoAny.java:130)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onComplete(FluxMapFuseable.java:144)
at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.drainAsync(FluxFlattenIterable.java:334)
at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.drain(FluxFlattenIterable.java:679)
at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.onComplete(FluxFlattenIterable.java:260)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onComplete(FluxFilterFuseable.java:165)
at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onComplete(FluxMapFuseable.java:336)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onComplete(FluxFilterFuseable.java:384)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1795)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:144)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onNext(FluxFilterFuseable.java:112)
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2393)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.request(FluxFilterFuseable.java:184)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:103)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onSubscribe(FluxFilterFuseable.java:81)
at reactor.core.publisher.MonoCurrentContext.subscribe(MonoCurrentContext.java:35)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150)
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:114)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onNext(FluxFilter.java:107)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67)
at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:76)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onNext(FluxFilter.java:107)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.tryEmitScalar(FluxFlatMap.java:481)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onNext(FluxFlatMap.java:414)
at reactor.core.publisher.FluxIterable$IterableSubscription.slowPath(FluxIterable.java:267)
at reactor.core.publisher.FluxIterable$IterableSubscription.request(FluxIterable.java:225)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onSubscribe(FluxFlatMap.java:364)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:161)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86)
at reactor.core.publisher.Mono.subscribe(Mono.java:4252)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:441)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:211)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:161)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1812)
at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onComplete(FluxDefaultIfEmpty.java:101)
at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:136)
at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:136)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:160)
at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onComplete(FluxMap.java:262)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1813)
at reactor.core.publisher.MonoCacheTime$CoordinatorSubscriber.signalCached(MonoCacheTime.java:320)
at reactor.core.publisher.MonoCacheTime$CoordinatorSubscriber.onNext(MonoCacheTime.java:337)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:192)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67)
at reactor.core.publisher.FluxSubscribeOnCallable$CallableSubscribeOnSubscription.run(FluxSubscribeOnCallable.java:249)
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:68)
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:28)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.springframework.security.authentication.AuthenticationCredentialsNotFoundException: Not Authenticated
at org.springframework.security.web.server.authorization.ExceptionTranslationWebFilter.commenceAuthentication(ExceptionTranslationWebFilter.java:72)
at org.springframework.security.web.server.authorization.ExceptionTranslationWebFilter.lambda$filter$1(ExceptionTranslationWebFilter.java:44)
at reactor.core.publisher.Mono.lambda$onErrorResume$31(Mono.java:3401)
at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:88)
at reactor.core.publisher.FluxOnAssembly$OnAssemblySubscriber.onError(FluxOnAssembly.java:390)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onError(Operators.java:2059)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onError(MonoFlatMap.java:165)
at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onError(Operators.java:2059)
at reactor.core.publisher.Operators.error(Operators.java:196)
at reactor.core.publisher.MonoError.subscribe(MonoError.java:52)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
at reactor.core.publisher.Mono.subscribe(Mono.java:4252)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:75)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:160)
at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onComplete(FluxDefaultIfEmpty.java:99)
at reactor.core.publisher.MonoNext$NextSubscriber.onComplete(MonoNext.java:96)
at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:77)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:274)
at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:851)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1812)
at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:241)
at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onNext(FluxDefaultIfEmpty.java:93)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:121)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1812)
at reactor.core.publisher.MonoAny$AnySubscriber.onComplete(MonoAny.java:130)
at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onComplete(FluxMapFuseable.java:144)
at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.drainAsync(FluxFlattenIterable.java:334)
at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.drain(FluxFlattenIterable.java:679)
at reactor.core.publisher.FluxFlattenIterable$FlattenIterableSubscriber.onComplete(FluxFlattenIterable.java:260)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onComplete(FluxFilterFuseable.java:165)
at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onComplete(FluxMapFuseable.java:336)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onComplete(FluxFilterFuseable.java:384)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1795)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:144)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onNext(FluxFilterFuseable.java:112)
at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2393)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.request(FluxFilterFuseable.java:184)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:103)
at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onSubscribe(FluxFilterFuseable.java:81)
at reactor.core.publisher.MonoCurrentContext.subscribe(MonoCurrentContext.java:35)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150)
at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:114)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onNext(FluxFilter.java:107)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67)
at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:76)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onNext(FluxFilter.java:107)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.tryEmitScalar(FluxFlatMap.java:481)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onNext(FluxFlatMap.java:414)
at reactor.core.publisher.FluxIterable$IterableSubscription.slowPath(FluxIterable.java:267)
at reactor.core.publisher.FluxIterable$IterableSubscription.request(FluxIterable.java:225)
at reactor.core.publisher.FluxFlatMap$FlatMapMain.onSubscribe(FluxFlatMap.java:364)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:161)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86)
at reactor.core.publisher.Mono.subscribe(Mono.java:4252)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:441)
at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:211)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:161)
at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64)
at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1812)
at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onComplete(FluxDefaultIfEmpty.java:101)
at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:136)
at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:136)
at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:160)
at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onComplete(FluxMap.java:262)
at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1813)
at reactor.core.publisher.MonoCacheTime$CoordinatorSubscriber.signalCached(MonoCacheTime.java:320)
at reactor.core.publisher.MonoCacheTime$CoordinatorSubscriber.onNext(MonoCacheTime.java:337)
at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:192)
at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67)
at reactor.core.publisher.FluxSubscribeOnCallable$CallableSubscribeOnSubscription.run(FluxSubscribeOnCallable.java:249)
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:68)
at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:28)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
[CIRCULAR REFERENCE:org.springframework.security.access.AccessDeniedException: Access Denied]

Reactive Spring Security: AuthenticationCredentialsNotFoundException after successful authentication

Probably the answer to my question is easy and I am missing something simple, but I have searched all around the internet and tried to debug this error for weeks, without any progress.
I have registered a filter in the reactive spring security config, this filter is executed at the authentication level, and its purpose is to validate a JWT token present in the authentication header. So it's the typical JWT authentication pattern.
The JWT validation, by itself, works properly. It is able to validate a JWT token, check if it is expired, wrong, valid, and so on. This is visible by printing the SecurityContext object:
SecurityContextImpl [Authentication=UsernamePasswordAuthenticationToken [Principal=UserDetailsDTO(id=2, username=peppe2, password=null, email=peppe2#yopmail.com, roles=[ADMIN], isEnabled=true, isLocked=false), Credentials=[PROTECTED], Authenticated=true, Details=null, Granted Authorities=[ADMIN]]]
And also the Authentication object:
UsernamePasswordAuthenticationToken [Principal=UserDetailsDTO(id=2, username=peppe2, password=null, email=peppe2#yopmail.com, roles=[ADMIN], isEnabled=true, isLocked=false), Credentials=[PROTECTED], Authenticated=true, Details=null, Granted Authorities=[ADMIN]]
But, no matter what I do after the authentication filter, I receive a AuthenticationCredentialsNotFoundException in the ServerHttpSecurity error callback. Here is the full stack trace:
catalog-svc | 2021-09-13 13:52:41.753 ERROR 1 --- [ parallel-3]
a.w.r.e.AbstractErrorWebExceptionHandler : [8415b576-2] 500 Server Error for HTTP PATCH "/users/1"
catalog-svc |
catalog-svc | org.springframework.security.authentication.AuthenticationCredentialsNotFoundException: Not Authenticated
catalog-svc | at org.springframework.security.web.server.authorization.ExceptionTranslationWebFilter.commenceAuthentication(ExceptionTranslationWebFilter.java:70) ~[spring-security-web-5.5.1.jar!/:5.5.1]
catalog-svc | Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
catalog-svc | Error has been observed at the following site(s):
catalog-svc | |_ checkpoint ⇢ org.springframework.security.web.server.authorization.ExceptionTranslationWebFilter [DefaultWebFilterChain]
catalog-svc | |_ checkpoint ⇢ org.springframework.security.web.server.authentication.logout.LogoutWebFilter [DefaultWebFilterChain]
catalog-svc | |_ checkpoint ⇢ org.springframework.security.web.server.savedrequest.ServerRequestCacheWebFilter [DefaultWebFilterChain]
catalog-svc | |_ checkpoint ⇢ org.springframework.security.web.server.context.SecurityContextServerWebExchangeWebFilter [DefaultWebFilterChain]
catalog-svc | |_ checkpoint ⇢ it.polito.ecommerce.catalogservice.security.JwtAuthenticationTokenFilter [DefaultWebFilterChain]
catalog-svc | |_ checkpoint ⇢ org.springframework.security.web.server.context.ReactorContextWebFilter [DefaultWebFilterChain]
catalog-svc | |_ checkpoint ⇢ org.springframework.security.web.server.header.HttpHeaderWriterWebFilter [DefaultWebFilterChain]
catalog-svc | |_ checkpoint ⇢ org.springframework.security.config.web.server.ServerHttpSecurity$ServerWebExchangeReactorContextWebFilter [DefaultWebFilterChain]
catalog-svc | |_ checkpoint ⇢ org.springframework.security.web.server.WebFilterChainProxy [DefaultWebFilterChain]
catalog-svc | |_ checkpoint ⇢ HTTP PATCH "/api/v1/users/1" [ExceptionHandlingWebHandler]
catalog-svc | Stack trace:
catalog-svc | at org.springframework.security.web.server.authorization.ExceptionTranslationWebFilter.commenceAuthentication(ExceptionTranslationWebFilter.java:70) ~[spring-security-web-5.5.1.jar!/:5.5.1]
catalog-svc | at org.springframework.security.web.server.authorization.ExceptionTranslationWebFilter.lambda$filter$1(ExceptionTranslationWebFilter.java:45) ~[spring-security-web-5.5.1.jar!/:5.5.1]
catalog-svc | at reactor.core.publisher.Mono.lambda$onErrorResume$32(Mono.java:3564) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onError(FluxOnErrorResume.java:94) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onError(Operators.java:2062) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onError(MonoPeekTerminal.java:258) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onError(MonoPeekTerminal.java:258) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoFlatMap$FlatMapMain.onError(MonoFlatMap.java:172) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onError(Operators.java:2062) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators.error(Operators.java:197) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoError.subscribe(MonoError.java:52) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:81) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:166) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onComplete(FluxDefaultIfEmpty.java:106) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoNext$NextSubscriber.onComplete(MonoNext.java:102) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:83) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:281) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:860) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:249) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onComplete(FluxDefaultIfEmpty.java:108) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onComplete(FluxMapFuseable.java:150) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onComplete(FluxFilterFuseable.java:171) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onComplete(FluxMapFuseable.java:344) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onComplete(FluxFilterFuseable.java:391) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:148) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onNext(FluxFilterFuseable.java:118) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2397) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.request(FluxFilterFuseable.java:191) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:110) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onSubscribe(FluxFilterFuseable.java:87) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoCurrentContext.subscribe(MonoCurrentContext.java:36) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:157) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:127) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onNext(FluxFilterFuseable.java:118) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2397) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.request(FluxFilterFuseable.java:191) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:169) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:110) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:96) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onSubscribe(FluxFilterFuseable.java:87) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:448) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:218) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:164) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:255) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:51) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:81) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:166) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxPeekFuseable$PeekConditionalSubscriber.onComplete(FluxPeekFuseable.java:940) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:84) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2399) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:2193) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:2067) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:81) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoNext$NextSubscriber.onComplete(MonoNext.java:102) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:166) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFlatMap$FlatMapMain.checkTerminated(FluxFlatMap.java:846) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFlatMap$FlatMapMain.drainLoop(FluxFlatMap.java:608) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFlatMap$FlatMapMain.drain(FluxFlatMap.java:588) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFlatMap$FlatMapMain.onComplete(FluxFlatMap.java:465) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onComplete(FluxPeekFuseable.java:277) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxIterable$IterableSubscription.slowPath(FluxIterable.java:292) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxIterable$IterableSubscription.request(FluxIterable.java:228) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.request(FluxPeekFuseable.java:144) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFlatMap$FlatMapMain.onSubscribe(FluxFlatMap.java:371) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onSubscribe(FluxPeekFuseable.java:178) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:164) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:157) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onComplete(FluxDefaultIfEmpty.java:108) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:166) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onComplete(FluxMap.java:269) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1816) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoCacheTime$CoordinatorSubscriber.signalCached(MonoCacheTime.java:337) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoCacheTime$CoordinatorSubscriber.onNext(MonoCacheTime.java:354) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:199) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:73) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoPublishOn$PublishOnSubscriber.run(MonoPublishOn.java:181) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:68) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:28) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at java.base/java.util.concurrent.FutureTask.run(Unknown Source) ~[na:na]
catalog-svc | at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source) ~[na:na]
catalog-svc | at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) ~[na:na]
catalog-svc | at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) ~[na:na]
catalog-svc | at java.base/java.lang.Thread.run(Unknown Source) ~[na:na]
catalog-svc | Caused by: org.springframework.security.access.AccessDeniedException: Access Denied
catalog-svc | at org.springframework.security.authorization.ReactiveAuthorizationManager.lambda$verify$0(ReactiveAuthorizationManager.java:53) ~[spring-security-core-5.5.1.jar!/:5.5.1]
catalog-svc | Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
catalog-svc | Error has been observed at the following site(s):
catalog-svc | |_ checkpoint ⇢ org.springframework.security.web.server.authorization.AuthorizationWebFilter [DefaultWebFilterChain]
catalog-svc | Stack trace:
catalog-svc | at org.springframework.security.authorization.ReactiveAuthorizationManager.lambda$verify$0(ReactiveAuthorizationManager.java:53) ~[spring-security-core-5.5.1.jar!/:5.5.1]
catalog-svc | at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:44) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:81) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:166) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onComplete(FluxDefaultIfEmpty.java:106) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoNext$NextSubscriber.onComplete(MonoNext.java:102) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:83) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:281) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:860) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:249) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onComplete(FluxDefaultIfEmpty.java:108) ~[reactor-core-3.4.7.jar!/:3.4.7]
catalog-svc | at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onComplete(FluxMapFuseable.java:150) ~[reactor-core-3.4.7.jar!/:3.4.7]
While here is the SecurityConfig:
#Bean
fun springSecurityFilterChain(
http: ServerHttpSecurity,
authManager: ReactiveAuthenticationManager?
): SecurityWebFilterChain {
return http
.exceptionHandling()
.authenticationEntryPoint { swe, e ->
// The error is caught here
Mono.fromRunnable {
swe.response.statusCode = HttpStatus.UNAUTHORIZED
throw e
}
}.accessDeniedHandler { swe, e ->
Mono.fromRunnable {
swe.response.statusCode = HttpStatus.FORBIDDEN
throw e
}
}.and()
.addFilterBefore(
jwtAuthenticationTokenFilter,
SecurityWebFiltersOrder.AUTHENTICATION)
.cors()
.and()
.csrf().disable()
.securityContextRepository(NoOpServerSecurityContextRepository.getInstance())
.authorizeExchange()
.pathMatchers("/auth/**").permitAll()
.anyExchange().authenticated()
.and().build()
}
and, in the end, the jwt filter:
#Component
class JwtAuthenticationTokenFilter(
private val jwtUtils: JwtUtils,
#Value("\${application.jwt.jwtHeader}") private val jwtHeader: String,
#Value("\${application.jwt.jwtHeaderStart}") private val jwtHeaderStart: String
) : WebFilter {
override fun filter(exchange: ServerWebExchange, chain: WebFilterChain): Mono<Void> {
val authorizationHeader= exchange.request.headers[jwtHeader]?.get(0)
if (authorizationHeader != null) {
val jwt = authorizationHeader.removePrefix("$jwtHeaderStart ")
if (jwtUtils.validateJwtToken(jwt)) {
val detailsFromJwtToken = jwtUtils.getDetailsFromJwtToken(jwt)
val authentication = UsernamePasswordAuthenticationToken(
detailsFromJwtToken,
null,
detailsFromJwtToken.authorities
)
ReactiveSecurityContextHolder.withAuthentication(authentication)
}
}
return chain.filter(exchange)
}
}
My questions are: how do I solve this problem? If you can't help me solving this, do you know any way to improve the stacktrace in Spring Reactive? Because I am not getting any hint for debugging.
Thank you

Webflux WebClient java.lang.NullPointerException

I'm having trouble connecting the webflux webclient to my endpoint.
In my controller, I'm trying to expose a hot stream of Chocolate DTO's.
When I try to call the endpoint with postman, it works.
This sentence exists because Stackoverflow wants me to add more text, because there is too much code in my question, sorry for the inconvience.
#RestController
public class HotChocolateController {
#GetMapping(value = "/stream/chocolate", produces = MediaType.APPLICATION_STREAM_JSON_VALUE)
public Flux<Chocolate> chocolateStream() {
return Flux.interval(Duration.ofMillis(500))
.map(l -> Chocolate.builder()
.id(String.valueOf(System.currentTimeMillis()))
.name("Hot Chocolate")
.build())
.log();
}
}
Then I'm trying to test my setup with an unit test:
#SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.DEFINED_PORT)
class ReactiveEndpointTests {
private final WebClient client = WebClient.builder().baseUrl("http://localhost:8080").build();
#Test
public void testHotChocolate(){
Flux<Chocolate> chocolateSource = client.get().uri("/stream/chocolate").retrieve().bodyToFlux(Chocolate.class);
chocolateSource.subscribe(chocolate -> System.out.println());
}
When I run this test, I get the following exception:
reactor.core.Exceptions$ErrorCallbackNotImplemented: java.lang.NullPointerException
Caused by: java.lang.NullPointerException: null
at reactor.netty.resources.ColocatedEventLoopGroup.register(ColocatedEventLoopGroup.java:71) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException:
Error has been observed at the following site(s):
|_ checkpoint ⇢ Request to GET http://localhost:8080/stream/chocolate [DefaultWebClient]
Stack trace:
at reactor.netty.resources.ColocatedEventLoopGroup.register(ColocatedEventLoopGroup.java:71) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at io.netty.bootstrap.AbstractBootstrap.initAndRegister(AbstractBootstrap.java:315) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.bootstrap.Bootstrap.doResolveAndConnect(Bootstrap.java:155) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.bootstrap.Bootstrap.connect(Bootstrap.java:116) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at reactor.netty.resources.PooledConnectionProvider$PooledConnectionAllocator.lambda$connectChannel$0(PooledConnectionProvider.java:248) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:57) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:4105) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.Mono.subscribeWith(Mono.java:4211) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:4077) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.Mono.subscribe(Mono.java:4013) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.netty.internal.shaded.reactor.pool.SimplePool.drainLoop(SimplePool.java:201) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.netty.internal.shaded.reactor.pool.SimplePool.drain(SimplePool.java:172) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.netty.internal.shaded.reactor.pool.SimplePool.doAcquire(SimplePool.java:132) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.netty.internal.shaded.reactor.pool.AbstractPool$Borrower.request(AbstractPool.java:336) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.netty.resources.PooledConnectionProvider$DisposableAcquire.onSubscribe(PooledConnectionProvider.java:504) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.netty.internal.shaded.reactor.pool.SimplePool$QueueBorrowerMono.subscribe(SimplePool.java:324) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.netty.resources.PooledConnectionProvider.disposableAcquire(PooledConnectionProvider.java:212) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.netty.resources.PooledConnectionProvider.lambda$acquire$3(PooledConnectionProvider.java:169) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:57) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect.lambda$subscribe$0(HttpClientConnect.java:319) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.core.publisher.MonoCreate.subscribe(MonoCreate.java:57) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.FluxRetryPredicate$RetryPredicateSubscriber.resubscribe(FluxRetryPredicate.java:124) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.FluxRetryPredicate$RetryPredicateSubscriber.onError(FluxRetryPredicate.java:99) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:183) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.netty.http.client.HttpClientConnect$MonoHttpConnect$TcpClientSubscriber.onError(HttpClientConnect.java:345) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:183) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.netty.resources.PooledConnectionProvider$DisposableAcquire.onError(PooledConnectionProvider.java:496) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.netty.internal.shaded.reactor.pool.AbstractPool$Borrower.fail(AbstractPool.java:381) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.netty.internal.shaded.reactor.pool.SimplePool.lambda$drainLoop$7(SimplePool.java:206) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.core.publisher.LambdaMonoSubscriber.doError(LambdaMonoSubscriber.java:152) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.LambdaMonoSubscriber.onError(LambdaMonoSubscriber.java:147) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.core.publisher.MonoCreate$DefaultMonoSink.error(MonoCreate.java:183) ~[reactor-core-3.3.2.RELEASE.jar:3.3.2.RELEASE]
at reactor.netty.resources.PooledConnectionProvider$PooledConnectionAllocator$PooledConnectionInitializer.operationComplete(PooledConnectionProvider.java:307) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at reactor.netty.resources.PooledConnectionProvider$PooledConnectionAllocator$PooledConnectionInitializer.operationComplete(PooledConnectionProvider.java:257) ~[reactor-netty-0.9.4.RELEASE.jar:0.9.4.RELEASE]
at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:577) ~[netty-common-4.1.45.Final.jar:4.1.45.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:570) ~[netty-common-4.1.45.Final.jar:4.1.45.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:549) ~[netty-common-4.1.45.Final.jar:4.1.45.Final]
at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:490) ~[netty-common-4.1.45.Final.jar:4.1.45.Final]
at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:615) ~[netty-common-4.1.45.Final.jar:4.1.45.Final]
at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:608) ~[netty-common-4.1.45.Final.jar:4.1.45.Final]
at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:117) ~[netty-common-4.1.45.Final.jar:4.1.45.Final]
at io.netty.channel.nio.AbstractNioChannel.doClose(AbstractNioChannel.java:502) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.channel.socket.nio.NioSocketChannel.doClose(NioSocketChannel.java:342) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.doClose0(AbstractChannel.java:759) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.close(AbstractChannel.java:736) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.close(AbstractChannel.java:607) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.channel.nio.NioEventLoop.closeAll(NioEventLoop.java:762) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:524) ~[netty-transport-4.1.45.Final.jar:4.1.45.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.45.Final.jar:4.1.45.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.45.Final.jar:4.1.45.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.45.Final.jar:4.1.45.Final]
at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]
Do you have any idea why this may happen?

You are just subscribing for the stream and immediately exiting the test method.
You can change the method to something like the code below and you'll be able to see the result of the get request:
#Test
public void testHotChocolate(){
Flux<String> chocolateSource =
client.get()
.uri("/stream/chocolate")
.retrieve()
.bodyToFlux(String.class)
.doOnNext(System.out::println);
chocolateSource.blockLast();
}

Why is my Java server code throwing a 502 error when attempting to receive a webhook from stripe?

I keep receiving this error message when I attempt to send a webhook to my server.
a
<html><body><h1>502 Bad Gateway</h1>
The server returned an invalid or incomplete response.
</body></html>
The full url for my api is http://localhost:8081/api.
I am using ngrok to tunnel this url to the internet. The resulting urls are https://75bb9fa8.ngrok.io and http://75bb9fa8.ngrok.io
In the Stripe dashboard, I created a webhook and set the endpoint to https://75bb9fa8.ngrok.io/api/webhooks/webhook, as this is the full url and path of my sever method that receives webhooks.
Webhook.JPG
Here is my complete webhook receiver class. It is based on https://stripe.com/docs/webhooks/setup...
package core.services;
import java.util.Optional;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.gson.JsonSyntaxException;
import com.stripe.model.Event;
import com.stripe.model.EventDataObjectDeserializer;
import com.stripe.model.StripeObject;
import com.stripe.net.ApiResource;
import spark.Request;
import spark.Response;
#Path("/webhooks")
public final class WebhookService {
private static final Logger LOGGER = LoggerFactory.getLogger(WebhookService.class);
public WebhookService() {
}
// Retrieve webhook endpoint's signing secret
final String endpointSecret = "whsec_4S4Htm9f2qU8llC70kDRP0AkP5Fl6gkx";
// Using the Spark framework (http://sparkjava.com)
#POST
#Path("/webhook")
public Object handle(RequestResponse requestresponse) {
Request request = requestresponse.request;
Response response = requestresponse.response;
String payload = request.body();
Event event = null;
try {
event = ApiResource.GSON.fromJson(payload, Event.class);
} catch (JsonSyntaxException e) {
// Invalid payload
response.status(400);
return "";
}
// Deserialize the nested object inside the event
EventDataObjectDeserializer dataObjectDeserializer = event.getDataObjectDeserializer();
Optional<StripeObject> stripeObject = null;
if (dataObjectDeserializer.getObject().isPresent()) {
stripeObject = dataObjectDeserializer.getObject();
} else {
// Deserialization failed, probably due to an API version mismatch.
// Refer to the Javadoc documentation on `EventDataObjectDeserializer` for
// instructions on how to handle this case, or return an error here.
}
// Handle the event
switch (event.getType()) {
case "customer.created":
System.out.println("customer created webhook");
break;
default:
// Unexpected event type
response.status(400);
return "";
}
response.status(200);
return "";
}
public static class RequestResponse {
Response response;
Request request;
}
}
And for the sake of completeness, here are my server logs...
2019-07-25 03:09:01.997 DESKTOP-2AB6RK0 server.Server$Builder 766 INFO Initializing server at http://192.168.1.91:8081/ in C:\Users\User\Documents\Work\projectDir\core\.
2019-07-25 03:09:02.024 DESKTOP-2AB6RK0 org.eclipse.jetty.util.log 793 INFO Logging initialized #1511ms to org.eclipse.jetty.util.log.Slf4jLog
2019-07-25 03:09:02.366 DESKTOP-2AB6RK0 org.eclipse.jetty.server.Server 1135 INFO jetty-9.4.12.v20180830; built: 2018-08-30T13:59:14.071Z; git: 27208684755d94a92186989f695db2d7b21ebc51; jvm 1.8.0_191-b12
2019-07-25 03:09:03.619 DESKTOP-2AB6RK0 org.hibernate.validator.internal.util.Version 2388 INFO HV000001: Hibernate Validator 6.0.11.Final
2019-07-25 03:09:04.038 DESKTOP-2AB6RK0 org.eclipse.jetty.server.handler.ContextHandler 2807 INFO Started o.e.j.s.ServletContextHandler#402f80f5{/,null,AVAILABLE}
2019-07-25 03:09:04.296 DESKTOP-2AB6RK0 org.eclipse.jetty.server.AbstractConnector 3065 INFO Started ServerConnector#5c909414{HTTP/1.1,[http/1.1]}{0.0.0.0:8081}
2019-07-25 03:09:04.297 DESKTOP-2AB6RK0 org.eclipse.jetty.server.Server 3066 INFO Started #3787ms
2019-07-25 03:09:35.763 DESKTOP-2AB6RK0 server.ExceptionMappers$OtherExceptionMapper 34532 ERROR java.lang.NullPointerException
java.lang.NullPointerException: null
at core.services.WebhookService.handle(WebhookService.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:124)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:167)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ObjectOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:192)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:79)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:469)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:391)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:80)
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:253)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:232)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:679)
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:392)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:365)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:318)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:873)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:542)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:703)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.Server.handle(Server.java:505)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:370)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:267)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
at java.lang.Thread.run(Unknown Source)
2019-07-25 03:09:35.911 DESKTOP-2AB6RK0 org.glassfish.jersey.server.ServerRuntime$Responder 34680 ERROR Error occurred when processing a response created from an already mapped exception.
2019-07-25 03:09:35.916 DESKTOP-2AB6RK0 org.eclipse.jetty.server.HttpChannel 34685 WARN /api/webhooks/webhook
javax.servlet.ServletException: org.glassfish.jersey.server.ContainerException: java.lang.NoSuchMethodError: org.eclipse.jetty.util.BufferUtil.remaining([Ljava/nio/ByteBuffer;)J
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:408)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:346)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:365)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:318)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:205)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:873)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:542)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:703)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.Server.handle(Server.java:505)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:370)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:267)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
at java.lang.Thread.run(Unknown Source)
Caused by: org.glassfish.jersey.server.ContainerException: java.lang.NoSuchMethodError: org.eclipse.jetty.util.BufferUtil.remaining([Ljava/nio/ByteBuffer;)J
at org.glassfish.jersey.servlet.internal.ResponseWriter.rethrow(ResponseWriter.java:254)
at org.glassfish.jersey.servlet.internal.ResponseWriter.failure(ResponseWriter.java:236)
at org.glassfish.jersey.server.ServerRuntime$Responder.process(ServerRuntime.java:436)
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:261)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244)
at org.glassfish.jersey.internal.Errors.process(Errors.java:292)
at org.glassfish.jersey.internal.Errors.process(Errors.java:274)
at org.glassfish.jersey.internal.Errors.process(Errors.java:244)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:232)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:679)
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:392)
... 26 common frames omitted
Caused by: java.lang.NoSuchMethodError: org.eclipse.jetty.util.BufferUtil.remaining([Ljava/nio/ByteBuffer;)J
at org.eclipse.jetty.io.WriteFlusher.flush(WriteFlusher.java:392)
at org.eclipse.jetty.io.WriteFlusher.write(WriteFlusher.java:277)
at org.eclipse.jetty.io.AbstractEndPoint.write(AbstractEndPoint.java:380)
at org.eclipse.jetty.server.HttpConnection$SendCallback.process(HttpConnection.java:814)
at org.eclipse.jetty.util.IteratingCallback.processing(IteratingCallback.java:241)
at org.eclipse.jetty.util.IteratingCallback.iterate(IteratingCallback.java:224)
at org.eclipse.jetty.server.HttpConnection.send(HttpConnection.java:550)
at org.eclipse.jetty.server.HttpChannel.sendResponse(HttpChannel.java:845)
at org.eclipse.jetty.server.HttpChannel.write(HttpChannel.java:921)
at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:249)
at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:225)
at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:550)
at org.glassfish.jersey.servlet.internal.ResponseWriter$NonCloseableOutputStreamWrapper.write(ResponseWriter.java:301)
at java.io.ByteArrayOutputStream.writeTo(Unknown Source)
at org.glassfish.jersey.message.internal.CommittingOutputStream.flushBuffer(CommittingOutputStream.java:278)
at org.glassfish.jersey.message.internal.CommittingOutputStream.commit(CommittingOutputStream.java:232)
at org.glassfish.jersey.message.internal.CommittingOutputStream.close(CommittingOutputStream.java:247)
at org.glassfish.jersey.message.internal.OutboundMessageContext.close(OutboundMessageContext.java:824)
at org.glassfish.jersey.server.ContainerResponse.close(ContainerResponse.java:389)
at org.glassfish.jersey.server.ServerRuntime$Responder.writeResponse(ServerRuntime.java:710)
at org.glassfish.jersey.server.ServerRuntime$Responder.processResponse(ServerRuntime.java:371)
at org.glassfish.jersey.server.ServerRuntime$Responder.process(ServerRuntime.java:417)
... 36 common frames omitted
What am I doing incorrectly?
Thank you.
Perhaps the problem has to do with the parameters of my webhook method. The #POST and #Path annotations require that the method only take a single JSON object as a parameter. However, the webhook might be sending two separate parameters - a request object and a response object. If you think this inconsistency is the source of the problem, then how can I refactor the server code to accommodate the structure of the webhook?

You can try add this under the path parameter
#Consumes("application/x-www-form-urlencoded")
Because header authentication relation