Develop Reference

Spring boot Graphql Not worked

the application stands up but the graphql end point is not produced. I generated this project on start.spring.io but originally settings is the graphql end point not produced
application.yml
datasource:
url: jdbc:postgresql://localhost:10000/postgres
username: admin
password: 12345
graphql:
graphiql:
enabled: true
log
2022-07-07 09:44:40.006 INFO 10960 --- [ restartedMain] c.i.e.EmployeeManagmentApplication : No active profile set, falling back to 1 default profile: "default"
2022-07-07 09:44:40.173 INFO 10960 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2022-07-07 09:44:40.173 INFO 10960 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2022-07-07 09:44:41.787 INFO 10960 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode
2022-07-07 09:44:41.788 INFO 10960 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2022-07-07 09:44:41.823 INFO 10960 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 13 ms. Found 0 JPA repository interfaces.
2022-07-07 09:44:41.866 INFO 10960 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode
2022-07-07 09:44:41.869 INFO 10960 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data Redis repositories in DEFAULT mode.
2022-07-07 09:44:41.891 INFO 10960 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 2 ms. Found 0 Redis repository interfaces.
2022-07-07 09:44:43.152 INFO 10960 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2022-07-07 09:44:43.168 INFO 10960 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2022-07-07 09:44:43.168 INFO 10960 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.64]
2022-07-07 09:44:43.326 INFO 10960 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2022-07-07 09:44:43.326 INFO 10960 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 3149 ms
2022-07-07 09:44:43.500 INFO 10960 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2022-07-07 09:44:43.722 INFO 10960 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2022-07-07 09:44:43.794 INFO 10960 --- [ restartedMain] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2022-07-07 09:44:43.927 INFO 10960 --- [ restartedMain] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.6.9.Final
2022-07-07 09:44:44.284 INFO 10960 --- [ restartedMain] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2022-07-07 09:44:44.547 INFO 10960 --- [ restartedMain] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.PostgreSQL10Dialect
2022-07-07 09:44:44.780 INFO 10960 --- [ restartedMain] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2022-07-07 09:44:44.793 INFO 10960 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2022-07-07 09:44:44.903 WARN 10960 --- [ restartedMain] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2022-07-07 09:44:46.688 INFO 10960 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2022-07-07 09:44:46.779 INFO 10960 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2022-07-07 09:44:46.805 INFO 10960 --- [ restartedMain] c.i.e.EmployeeManagmentApplication : Started EmployeeManagmentApplication in 7.652 seconds (JVM running for 10.128)```
pom.xml

Permission denied in getting spanner session create in a java spring boot project using spanner emulator

I am trying to run a basic spring boot application with JPA by using spanner emulator. However, I am getting the below error after startup after hitting any exposed end point.
PERMISSION_DENIED: com.google.api.gax.rpc.PermissionDeniedException: io.grpc.StatusRuntimeException: PERMISSION_DENIED: Caller is missing IAM permission spanner.sessions.create on resource projects/test-project/instances/test-instance/databases/test-database.
Project has been cloned from https://github.com/GoogleCloudPlatform/google-cloud-spanner-hibernate/tree/master/google-cloud-spanner-hibernate-samples/spring-data-jpa-sample
and the only change I have done is updated the application.properties file.
as per my understanding spanner emulator should not have any IAM related issues as it doesn't need any. I am not sure what is causing this issue here. I have verified that the emulator config is the active config and hence I would expect the code to connect to emulator.
# Application configuration to use Cloud Spanner with Spring Data JPA
# Spanner connection URL.
# - ${PROJECT_ID} Replace with your GCP project ID
# - ${INSTANCE_ID} Replace with your Spanner instance ID
# - ${DATABASE_NAME} Replace with your Spanner database name within your Spanner instance
spring.datasource.url=jdbc:cloudspanner:/projects/test-project/instances/test-instance/databases/test-database
# Specify the Spanner JDBC driver.
spring.datasource.driver-class-name=com.google.cloud.spanner.jdbc.JdbcDriver
# Specify the Spanner Hibernate dialect.
spring.jpa.properties.hibernate.dialect=com.google.cloud.spanner.hibernate.SpannerDialect
#spring.jpa.hibernate.ddl-auto=update //same error even if I uncomment this line
# Settings to enable batching statements for efficiency
spring.jpa.properties.hibernate.jdbc.batch_size=100
# You may display SQL statements and stats for debugging if needed.
spring.jpa.properties.hibernate.show_sql=true
spring.jpa.properties.hibernate.format_sql=true
Please find the console logs below:
2021-10-06 12:59:12.549 INFO 9747 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-10-06 12:59:12.556 INFO 9747 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-10-06 12:59:12.556 INFO 9747 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.53]
2021-10-06 12:59:12.617 INFO 9747 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-10-06 12:59:12.617 INFO 9747 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 694 ms
2021-10-06 12:59:12.707 INFO 9747 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2021-10-06 12:59:12.737 WARN 9747 --- [ main] c.g.a.oauth2.DefaultCredentialsProvider : Your application has authenticated using end user credentials from Google Cloud SDK. We recommend that most server applications use service accounts instead. If your application continues to use end user credentials from Cloud SDK, you might receive a "quota exceeded" or "API not enabled" error. For more information about service accounts, see https://cloud.google.com/docs/authentication/.
2021-10-06 12:59:14.558 INFO 9747 --- [ main] com.zaxxer.hikari.pool.PoolBase : HikariPool-1 - Driver does not support get/set network timeout for connections. (Network timeout is not supported)
2021-10-06 12:59:22.165 INFO 9747 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2021-10-06 12:59:22.197 INFO 9747 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2021-10-06 12:59:22.231 INFO 9747 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.29.Final
2021-10-06 12:59:22.337 INFO 9747 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2021-10-06 12:59:22.396 INFO 9747 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: com.google.cloud.spanner.hibernate.SpannerDialect
2021-10-06 12:59:22.851 INFO 9747 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2021-10-06 12:59:22.857 INFO 9747 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2021-10-06 12:59:23.060 WARN 9747 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2021-10-06 12:59:23.184 INFO 9747 --- [ main] o.s.b.a.w.s.WelcomePageHandlerMapping : Adding welcome page template: index
2021-10-06 12:59:23.290 INFO 9747 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2021-10-06 12:59:23.298 INFO 9747 --- [ main] com.example.CoffeeApplication : Started CoffeeApplication in 12.957 seconds (JVM running for 13.227)
2021-10-06 12:59:33.646 INFO 9747 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2021-10-06 12:59:33.646 INFO 9747 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2021-10-06 12:59:33.647 INFO 9747 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 1 ms
Hibernate:
select
customer0_.id as id1_1_,
customer0_.email as email2_1_,
customer0_.name as name3_1_
from
customer customer0_
2021-10-06 12:59:35.650 WARN 9747 --- [nio-8080-exec-1] o.h.engine.jdbc.spi.SqlExceptionHelper : SQL Error: 7, SQLState: null
2021-10-06 12:59:35.650 ERROR 9747 --- [nio-8080-exec-1] o.h.engine.jdbc.spi.SqlExceptionHelper : PERMISSION_DENIED: com.google.api.gax.rpc.PermissionDeniedException: io.grpc.StatusRuntimeException: PERMISSION_DENIED: Caller is missing IAM permission spanner.sessions.create on resource projects/test-project/instances/test-instance/databases/test-database.
2021-10-06 12:59:35.668 ERROR 9747 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.orm.jpa.JpaSystemException: could not extract ResultSet; nested exception is org.hibernate.exception.GenericJDBCException: could not extract ResultSet] with root cause
io.grpc.StatusRuntimeException: PERMISSION_DENIED: Caller is missing IAM permission spanner.sessions.create on resource projects/test-project/instances/test-instance/databases/test-database.
at io.grpc.Status.asRuntimeException(Status.java:535) ~[grpc-api-1.40.1.jar:1.40.1]
at io.grpc.stub.ClientCalls$UnaryStreamToFuture.onClose(ClientCalls.java:533) ~[grpc-stub-1.40.1.jar:1.40.1]
at io.grpc.PartialForwardingClientCallListener.onClose(PartialForwardingClientCallListener.java:39) ~[grpc-api-1.40.1.jar:1.40.1]
at io.grpc.ForwardingClientCallListener.onClose(ForwardingClientCallListener.java:23) ~[grpc-api-1.40.1.jar:1.40.1]
at io.grpc.ForwardingClientCallListener$SimpleForwardingClientCallListener.onClose(ForwardingClientCallListener.java:40) ~[grpc-api-1.40.1.jar:1.40.1]
at com.google.cloud.spanner.spi.v1.SpannerErrorInterceptor$1$1.onClose(SpannerErrorInterceptor.java:100) ~[google-cloud-spanner-6.12.5.jar:6.12.5]
at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:557) ~[grpc-core-1.40.1.jar:1.40.1]
at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:69) ~[grpc-core-1.40.1.jar:1.40.1]
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:738) ~[grpc-core-1.40.1.jar:1.40.1]
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:717) ~[grpc-core-1.40.1.jar:1.40.1]
at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37) ~[grpc-core-1.40.1.jar:1.40.1]
at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:133) ~[grpc-core-1.40.1.jar:1.40.1]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_281]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_281]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) ~[na:1.8.0_281]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) ~[na:1.8.0_281]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_281]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_281]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_281]

The error is a clear indication that your application is not trying to connect to the emulator, but to a real Spanner database. In order to connect to the emulator instead of 'real' Cloud Spanner, you should do one of the following:
Set the environment variable SPANNER_EMULATOR_HOST=localhost:9010
OR: Edit the JDBC connection URL to include the autoConfigEmulator=true property. Your JDBC URL would then become jdbc:cloudspanner:/projects/test-project/instances/test-instance/databases/test-database;autoConfigEmulator=true
The advantage of the second alternative is that the autoConfigEmulator property will not only ensure that the JDBC driver is connecting to the emulator, it will also automatically create the test-instance and test-database on the emulator if they do not already exist.

#SpringBootApplication Annotation not finding beans in classpath

From my understanding using #SpringBootApplication is the equivalent of having #EnableAutoConfiguration and #ComponentScan. For this reason I can't understand why Spring isn't finding my annotations. As far as I'm aware the project structure is as it should be and everything is annotated properly. However when I visit the mapped endpoint http://localhost:8080/dashboard or http://localhost:8080/dashboard/, I see a 404 error.
I just created a new Spring Boot project using IntelliJ's built in Spring Initialiser, I selected Spring Web, and a few components for Postgres. Inside the project I can't find any additional .xml files for configuration. However, I did find:
DataSourceInitializerInvoker.java - which hasn't been edited
ConfigurationPropertiesAutoConfiguration.java - which hasn't been edited
Structure of my project is as follows:
com
+-abcde
+-appname
+-controllers
DashboardController.java
Application.java
Application.java:
package com.abcde.appname;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
#SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
DashboardController.java
package com.abcde.appname.controllers;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
#Controller
#RequestMapping("/dashboard")
public class DashboardController {
#Autowired
public DashboardController() {
}
#GetMapping
public ModelAndView renderDashboard() {
return new ModelAndView("dashboard/index");
}
}
Alongside these files I also have the following,
application.properties
spring.datasource.url=jdbc:postgresql://localhost:5432/postgres
spring.datasource.username=user
spring.datasource.driver-class-name=org.postgresql.Driver
spring.main.banner-mode=off
build.gradle
plugins {
id 'org.springframework.boot' version '2.3.3.RELEASE'
id 'io.spring.dependency-management' version '1.0.10.RELEASE'
id 'java'
}
group = 'com.abcde'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = '14'
repositories {
mavenCentral()
}
dependencies {
implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
implementation 'org.springframework.boot:spring-boot-starter-freemarker'
implementation 'org.springframework.boot:spring-boot-starter-web'
implementation 'org.flywaydb:flyway-core'
runtimeOnly 'org.postgresql:postgresql'
testImplementation('org.springframework.boot:spring-boot-starter-test') {
exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
}
}
test {
useJUnitPlatform()
}
stacktrace
2020-09-09 23:24:46.053 INFO 57966 --- [ main] c.d.f.Application : Starting Application on OP-MacBook-Pro.local with PID 57966 (/Users/op/IdeaProjects/lalala/build/classes/java/main started by op in /Users/op/IdeaProjects/lalala)
2020-09-09 23:24:46.054 INFO 57966 --- [ main] c.d.f.Application : No active profile set, falling back to default profiles: default
2020-09-09 23:24:46.374 INFO 57966 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFERRED mode.
2020-09-09 23:24:46.388 INFO 57966 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 10ms. Found 0 JPA repository interfaces.
2020-09-09 23:24:46.716 INFO 57966 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-09-09 23:24:46.720 INFO 57966 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-09-09 23:24:46.720 INFO 57966 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.37]
2020-09-09 23:24:46.775 INFO 57966 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-09-09 23:24:46.775 INFO 57966 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 700 ms
2020-09-09 23:24:46.832 INFO 57966 --- [ main] o.f.c.internal.license.VersionPrinter : Flyway Community Edition 6.4.4 by Redgate
2020-09-09 23:24:46.835 INFO 57966 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2020-09-09 23:24:46.872 INFO 57966 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2020-09-09 23:24:46.879 INFO 57966 --- [ main] o.f.c.internal.database.DatabaseFactory : Database: jdbc:postgresql://localhost:5432/postgres (PostgreSQL 12.3)
2020-09-09 23:24:46.901 INFO 57966 --- [ main] o.f.core.internal.command.DbValidate : Successfully validated 1 migration (execution time 00:00.011s)
2020-09-09 23:24:46.905 INFO 57966 --- [ main] o.f.core.internal.command.DbMigrate : Current version of schema "public": 10
2020-09-09 23:24:46.905 INFO 57966 --- [ main] o.f.core.internal.command.DbMigrate : Schema "public" is up to date. No migration necessary.
2020-09-09 23:24:46.960 INFO 57966 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-09-09 23:24:46.985 INFO 57966 --- [ task-1] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2020-09-09 23:24:47.000 WARN 57966 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2020-09-09 23:24:47.010 INFO 57966 --- [ task-1] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.20.Final
2020-09-09 23:24:47.070 INFO 57966 --- [ task-1] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2020-09-09 23:24:47.122 INFO 57966 --- [ task-1] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.PostgreSQL10Dialect
2020-09-09 23:24:47.253 INFO 57966 --- [ task-1] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2020-09-09 23:24:47.257 INFO 57966 --- [ task-1] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2020-09-09 23:24:47.264 INFO 57966 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2020-09-09 23:24:47.265 INFO 57966 --- [ main] DeferredRepositoryInitializationListener : Triggering deferred initialization of Spring Data repositories…
2020-09-09 23:24:47.266 INFO 57966 --- [ main] DeferredRepositoryInitializationListener : Spring Data repositories initialized!
2020-09-09 23:24:47.273 INFO 57966 --- [ main] c.d.f.lalala : Started Application in 1.401 seconds (JVM running for 1.885)
2020-09-09 23:24:49.520 INFO 57966 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2020-09-09 23:24:49.520 INFO 57966 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2020-09-09 23:24:49.524 INFO 57966 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 4 ms
Any insight into this problem would be much appreciated. Many thanks

It's probably successfully invoking the renderDashboard() and is not finding "dashboard/index". You can verify that by debugging and setting a breakpoint or adding a log/System.out println statement. Does your index file exist and is it setup correctly?

com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure when trying to build spring boot docker image

I am trying to build my docker image for my spring boot application but keep encountering this error:
:: Spring Boot :: (v2.2.5.RELEASE)
2020-05-31 02:18:39.820 INFO 63 --- [ main] c.g.Apollo.ApolloApplicationTests : Starting ApolloApplicationTests on 4b284b60945e with PID 63 (started by root in /build)
2020-05-31 02:18:39.838 INFO 63 --- [ main] c.g.Apollo.ApolloApplicationTests : No active profile set, falling back to default profiles: default
2020-05-31 02:18:42.208 INFO 63 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2020-05-31 02:18:42.467 INFO 63 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 216ms. Found 3 JPA repository interfaces.
2020-05-31 02:18:44.902 INFO 63 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2020-05-31 02:18:46.575 ERROR 63 --- [ main] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Exception during pool initialization.
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) ~[mysql-connector-java-8.0.20.jar:8.0.20]
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) ~[mysql-connector-java-8.0.20.jar:8.0.20]
at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:836) ~[mysql-connector-java-8.0.20.jar:8.0.20]
at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456) ~[mysql-connector-java-8.0.20.jar:8.0.20]
at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246) ~[mysql-connector-java-8.0.20.jar:8.0.20]
at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:197) ~[mysql-connector-java-8.0.20.jar:8.0.20]
at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138) ~[HikariCP-3.4.2.jar:na]
at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:354) ~[HikariCP-3.4.2.jar:na]
at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:202) ~[HikariCP-3.4.2.jar:na]
at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:473) ~[HikariCP-3.4.2.jar:na]
at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:554) ~[HikariCP-3.4.2.jar:na]
at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115) ~[HikariCP-3.4.2.jar:na]
at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:112) ~[HikariCP-3.4.2.jar:na]
Terminal when successfully running in intellij:
:: Spring Boot :: (v2.2.5.RELEASE)
2020-05-31 01:04:39.322 INFO 19524 --- [ restartedMain] c.g.Apollo.ApolloApplication : Starting ApolloApplication on asd-PC with PID 19524 (C:\Projects\Apollo\target\classes started by asd in C:\Projects\Apollo)
2020-05-31 01:04:39.324 INFO 19524 --- [ restartedMain] c.g.Apollo.ApolloApplication : No active profile set, falling back to default profiles: default
2020-05-31 01:04:39.354 INFO 19524 --- [ restartedMain] o.s.b.devtools.restart.ChangeableUrls : The Class-Path manifest attribute in C:\Users\asd\.m2\repository\org\glassfish\jaxb\jaxb-runtime\2.3.2\jaxb-runtime-2.3.2.jar referenced one or more files that do not exist: file:/C:/Users/asd/.m2/repository/org/glassfish/jaxb/jaxb-runtime/2.3.2/jakarta.xml.bind-api-2.3.2.jar,file:/C:/Users/asd/.m2/repository/org/glassfish/jaxb/jaxb-runtime/2.3.2/txw2-2.3.2.jar,file:/C:/Users/asd/.m2/repository/org/glassfish/jaxb/jaxb-runtime/2.3.2/istack-commons-runtime-3.0.8.jar,file:/C:/Users/asd/.m2/repository/org/glassfish/jaxb/jaxb-runtime/2.3.2/stax-ex-1.8.1.jar,file:/C:/Users/asd/.m2/repository/org/glassfish/jaxb/jaxb-runtime/2.3.2/FastInfoset-1.2.16.jar,file:/C:/Users/asd/.m2/repository/org/glassfish/jaxb/jaxb-runtime/2.3.2/jakarta.activation-api-1.2.1.jar
2020-05-31 01:04:39.354 INFO 19524 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2020-05-31 01:04:39.354 INFO 19524 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2020-05-31 01:04:39.785 INFO 19524 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2020-05-31 01:04:39.846 INFO 19524 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 54ms. Found 3 JPA repository interfaces.
2020-05-31 01:04:40.214 INFO 19524 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-05-31 01:04:40.220 INFO 19524 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-05-31 01:04:40.221 INFO 19524 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.31]
2020-05-31 01:04:40.293 INFO 19524 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-05-31 01:04:40.293 INFO 19524 --- [ restartedMain] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 939 ms
2020-05-31 01:04:40.365 INFO 19524 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2020-05-31 01:04:40.702 INFO 19524 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2020-05-31 01:04:40.731 INFO 19524 --- [ restartedMain] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2020-05-31 01:04:40.800 INFO 19524 --- [ restartedMain] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.12.Final
2020-05-31 01:04:40.919 INFO 19524 --- [ restartedMain] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2020-05-31 01:04:41.006 INFO 19524 --- [ restartedMain] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL8Dialect
2020-05-31 01:04:41.407 INFO 19524 --- [ restartedMain] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2020-05-31 01:04:41.413 INFO 19524 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2020-05-31 01:04:41.650 WARN 19524 --- [ restartedMain] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2020-05-31 01:04:41.717 INFO 19524 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-05-31 01:04:41.967 INFO 19524 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2020-05-31 01:04:41.995 INFO 19524 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2020-05-31 01:04:41.997 INFO 19524 --- [ restartedMain] c.g.Apollo.ApolloApplication : Started ApolloApplication in 2.911 seconds (JVM running for 3.899)
My Dockerfile:
FROM maven:3.6.3-jdk-11-slim AS MAVEN_BUILD
COPY pom.xml /build/
COPY src /build/src/
WORKDIR /build/
RUN mvn package
FROM openjdk:11-jre-alpine
WORKDIR /app
COPY --from=MAVEN_BUILD /build/target/*.war /app/app.war
ENTRYPOINT ["java", "-jar", "app.war"]
My application.properties:
## GraphQL SPQR ##
server.port=8080
graphql.spqr.gui.enabled=true
graphql.spqr.http.endpoint=/graphql
graphql.spqr.ws.endpoint=/graphql
## Database Properties ##
spring.datasource.url=jdbc:mysql://localhost:3306/innodb
spring.datasource.username=root
spring.datasource.password=1234
My application works when I build and run the project in Intellij but not when I try and build my docker image. I am using MySQL and have just been connecting on localhost on port 3306.

The error message seems to indicate the issue is failing to connect to the database. From your settings, it appears that you are trying to connect to the DB using localhost:3306. That will not work when you are running the application in a container because docker creates its own network which is separate from you machine’s network. So, localhost in the container does not refer to your machine.
You need to instead setup a docker network that will allow your container to access the database in a specific IP address.
Here is an article with the specifics:
https://nickjanetakis.com/blog/docker-tip-35-connect-to-a-database-running-on-your-docker-host
Note that I have assumed from your post, that the DB is installed in your host machine. If it is not and the DB is running in its own container, the you need to create a docker network and attach both containers to that network.

I had the same issue and resolved it by changing localhost to the service name on which MySQL was running.
Below is my docker-compose and application.properties files
docker-compose.yml
version: '3.8'
services:
app:
container_name: tvms
build:
context: .
dockerfile: Dockerfile
tty: true
volumes:
- ../..:/workspaces:cached
ports:
- 8990:8990
networks:
- impaq
links:
- db:db
db:
image: percona:8.0
privileged: true
restart: always
container_name: standalone-mysql
environment:
MYSQL_ROOT_PASSWORD: ****
volumes:
- perconadata:/var/lib/mysql
ports:
- 3306:3306
networks:
- impaq
networks:
impaq:
volumes:
perconadata:
application.propeties
#datasource
spring.datasource.url=jdbc:mysql://db:3306/db_name
spring.datasource.username=root
spring.datasource.password=*****

For me below solution worked
change your datasource url from
This:
spring.datasource.url=jdbc:mysql://localhost:3306/innodb
To:
spring.datasource.url=jdbc:mysql://localhost:3306/innodb?useSSL=false

Spring Boot 2.3 DataSource injection

I have issues with recent Springboot 2.3 release.
I have the following config class:
package name.defance.springbootdemo.security;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import javax.sql.DataSource;
#Configuration
public class SampleConfig {
#Autowired
public SampleConfig(DataSource dataSource) {
System.out.println("DATASOURCE: " + dataSource);
this.dataSource = dataSource;
}
final private DataSource dataSource;
}
With version 2.2.7 I have the following output:
<... truncated output ...>
2020-05-18 17:57:33.872 INFO 2081 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-05-18 17:57:33.873 INFO 2081 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.34]
2020-05-18 17:57:33.950 INFO 2081 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-05-18 17:57:33.950 INFO 2081 --- [ restartedMain] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2113 ms
2020-05-18 17:57:34.511 INFO 2081 --- [ restartedMain] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2020-05-18 17:57:34.555 INFO 2081 --- [ restartedMain] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.15.Final
2020-05-18 17:57:34.686 INFO 2081 --- [ restartedMain] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2020-05-18 17:57:34.801 INFO 2081 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2020-05-18 17:57:34.901 INFO 2081 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2020-05-18 17:57:34.922 INFO 2081 --- [ restartedMain] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.PostgreSQL10Dialect
2020-05-18 17:57:35.405 INFO 2081 --- [ restartedMain] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2020-05-18 17:57:35.411 INFO 2081 --- [ restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2020-05-18 17:57:35.463 WARN 2081 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : Unable to start LiveReload server
DATASOURCE: HikariDataSource (HikariPool-1)
<... truncated output ...>
With version 2.3.0.RELEASE I have the following:
<... truncated output ...>
2020-05-18 17:52:02.183 INFO 352 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-05-18 17:52:02.184 INFO 352 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.35]
2020-05-18 17:52:02.249 INFO 352 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-05-18 17:52:02.249 INFO 352 --- [ restartedMain] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2453 ms
2020-05-18 17:52:02.669 INFO 352 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
DATASOURCE: HikariDataSource (null)
2020-05-18 17:52:02.720 INFO 352 --- [ task-1] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2020-05-18 17:52:02.755 INFO 352 --- [ task-1] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.15.Final
2020-05-18 17:52:02.862 INFO 352 --- [ task-1] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2020-05-18 17:52:02.957 INFO 352 --- [ task-1] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2020-05-18 17:52:03.066 INFO 352 --- [ task-1] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2020-05-18 17:52:03.081 INFO 352 --- [ task-1] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.PostgreSQL10Dialect
2020-05-18 17:52:03.526 INFO 352 --- [ task-1] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]
2020-05-18 17:52:03.534 INFO 352 --- [ task-1] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2020-05-18 17:52:03.736 WARN 352 --- [ task-2] o.s.b.d.a.OptionalLiveReloadServer : Unable to start LiveReload server
<... truncated output ...>
The only difference between those is (in pom.xml):
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.7.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
vs
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
So with the new release datasource bean is configured in a separate thread, and my configuration bean received not-yet configured DataSource bean (null).
I cannot find any reference to configuration flow changes in release notes. What is wrong here, and why my code stopped working?
UPDATE. I reproduced this issue once more with Spring initializer. Options selected: Java 14, actuator, jdbc, web, devtools, postgres db driver
Application properties contains all the correct connection data (verified on other old-spring project). Its only contents is:
spring.datasource.url=jdbc:postgresql://localhost:15432/insurance-demo
spring.datasource.username=postgres
spring.datasource.password=postgresPWD
server.port=8080
Update: Project repo https://github.com/defance/datasource-demo

It looks like 'spring-boot-starter-data-jpa' can be added to the dependency set to bring the hikari pool start back to the same point it was before.
Using your repository, I added this section to the pom.xml:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
and the result:
2020-05-18 09:58:17.046 INFO 60543 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2020-05-18 09:58:17.094 INFO 60543 --- [ restartedMain] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
DATASOURCE: HikariDataSource (HikariPool-1)
Here is the doc section about data source configuration that I followed:
https://docs.spring.io/spring-boot/docs/current/reference/html/spring-boot-features.html#boot-features-sql