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Springboot application start up fails and missing logs when using azure.keyvault.secret.property-sources

I am trying to migrate my springboot application written in kotlin to azure.
I added spring-cloud-azure-starter-keyvault-secrets:4.5.0 dependency in my app, and added below configurations to application.properties.
my.secret=${my-azure-secret}
spring.cloud.azure.keyvault.secret.property-source-enabled=true
spring.cloud.azure.keyvault.secret.property-sources[0].endpoint=<my-vault>.vault.azure.net/
After I add this, the spring boot initialization doesn't work any more and i can't find any logs.
log.info { "Log before springboot initialize" }
SpringApplication(MyApplication::class.java).run(*args)
log.info { "Log after springboot initialize" }
So, Log before springboot initialize is logged, and after that nothing happens (or I can't find any logs afterwards)
I already verified it is not related to any logback settings because if I remove the property spring.cloud.azure.keyvault.secret.property-sources[0].endpoint from application.properties, it boots up properly.
(I also tried to add the additional dependency spring-cloud-azure-dependencies:4.5.0 )
Any clues/hints what is happening and how to resolve it ?
Thanks.

Here I was able to boot the spring application using the same dependencies.
But here I used the latest version of spring-cloud-azure-starter-keyvault-secrets i.e. 5.0.0 also my spring boot version is 3.0.2
my dependencies:
<dependencies>
<dependency> <groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency> <!-- https://mvnrepository.com/artifact/com.azure.spring/spring-cloud-azure-starter-keyvault-secrets -->
<dependency>
<groupId>com.azure.spring</groupId>
<artifactId>spring-cloud-azure-starter-keyvault-secrets</artifactId>
<version>5.0.0</version>
</dependency>
<dependency> <groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency></dependencies>
Also I use windows so instead of my_azure_secret instead of the my-azure-secret
output:

Integrate New Relic with Spring Boot using Micrometer

I am trying to integrate a simple Spring Boot Application with New Relic using Micrometer.
Here are the configurations details:-
application.properties
management.endpoints.web.exposure.include=*
management.endpoint.health.show-details=always
management.metrics.export.newrelic.enabled=true
management.metrics.export.newrelic.api-key:MY_API_KEY // Have added the API key here
management.metrics.export.newrelic.account-id: MY_ACCOUNT_ID // Have added the account id here
logging.level.io.micrometer.newrelic=TRACE
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.5</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>springboot.micrometer.demo</groupId>
<artifactId>micrometer-new-relic</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>micrometer-new-relic</name>
<description>Demo project for actuator integration with new relic using micrometer</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>io.micrometer</groupId>
<artifactId>micrometer-registry-new-relic</artifactId>
</dependency>
<dependency>
<groupId>io.micrometer</groupId>
<artifactId>micrometer-registry-prometheus</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>
I was able to integrate Prometheus with this application using micrometer-registry-prometheus dependency. I had set up Prometheus to run in a Docker container in my local system. I used the following set of commands-
docker pull prom/prometheus
docker run -p 9090:9090 -v D:/Workspaces/STS/server_sent_events_blog/micrometer-new-relic/prometheus.yml:/etc/prometheus/prometheus.yml prom/prometheus
prometheus.yml
global:
scrape_interval: 4s
evaluation_interval: 4s
scrape_configs:
- job_name: 'spring_micrometer'
metrics_path: '/actuator/prometheus'
scrape_interval: 5s
static_configs:
- targets: ['my_ip_address:8080']
When I navigated to localhost:9090/targets I can see that Prometheus dashboard shows my application details and that it can scrape data from it. And in the dashboard, I can see my custom metrics as well along with other metrics.
So my question is I want to achieve the same thing using New Relic. I have added the micrometer-registry-new-relic pom dependency. I have shared the application.properties file as well. I can see logs in my console saying it is sending data to New Relic-
2021-10-24 12:42:04.889 DEBUG 2672 --- [trics-publisher] i.m.n.NewRelicInsightsApiClientProvider : successfully sent 58 metrics to New Relic.
Questions:
What are the next steps?
Do I need a local running server of New Relic as I did for Prometheus?
Where can I visualize this data? I have an account in New Relic, I see nothing there
https://discuss.newrelic.com/t/integrate-spring-boot-actuator-with-new-relic/126732
As per the above link, Spring Bootctuator pushes metric as an event type “SpringBootSample”.
With NRQL query we can confirm this-
FROM SpringBootSample SELECT max(value) TIMESERIES 1 minute WHERE metricName = 'jvmMemoryCommitted'
What does the result of this query indicate? Is it a metric related to my application?
Here is the GitHub link to the demo that I have shared here.
I did not find any clear instructions on this, there are some examples out there but that uses Java agent.
Any kind of help will be highly appreciated.

From what I have learned so far.
There are 3 ways to integrate New Relic with a Spring Boot Application-
Using the Java Agent provided by New Relic
Using New Relic's Micrometer Dependency
Micormeter's New Relic Dependency
1. Configuration using Java Agent Provided By New Relic
Download the Java Agent from this URL- https://docs.newrelic.com/docs/release-notes/agent-release-notes/java-release-notes/
Extract it.
Modify the newrelic.yml file inside the extracted folder to inlcude your
license_key:
app_name:
Create a SpringBoot application with some REST endpoints.
Build the application.
Navigate to the root path where you have extracted the newrelic java agent.
Enter this command
java -javagent:<path to your new relic jar>\newrelic.jar -jar <path to your application jar>\<you rapplication jar name>.jar
To view the application metrics-
Log in to your New Relic account.
Go to Explorer Tab.
Click on Services-APM
You can see the name of your application(which you had mentioned in the newrelic.yml file) listed there.
Click on the application name.
The dashboard should look something like this.
Using New Relic's Micrometer Dependency is the preferred way to do it.
2. Configuration using New Relic's Micrometer Dependency
Add this dependency
<dependency>
<groupId>com.newrelic.telemetry</groupId>
<artifactId>micrometer-registry-new-relic</artifactId>
<version>0.7.0</version>
</dependency>
Modify the MicrometerConfig.java class to add your API Key and Application name.
import java.net.InetAddress;
import java.net.UnknownHostException;
import org.springframework.boot.actuate.autoconfigure.metrics.CompositeMeterRegistryAutoConfiguration;
import org.springframework.boot.actuate.autoconfigure.metrics.MetricsAutoConfiguration;
import org.springframework.boot.actuate.autoconfigure.metrics.export.simple.SimpleMetricsExportAutoConfiguration;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import com.newrelic.telemetry.Attributes;
import com.newrelic.telemetry.micrometer.NewRelicRegistry;
import com.newrelic.telemetry.micrometer.NewRelicRegistryConfig;
import java.time.Duration;
import io.micrometer.core.instrument.config.MeterFilter;
import io.micrometer.core.instrument.util.NamedThreadFactory;
#Configuration
#AutoConfigureBefore({ CompositeMeterRegistryAutoConfiguration.class, SimpleMetricsExportAutoConfiguration.class })
#AutoConfigureAfter(MetricsAutoConfiguration.class)
#ConditionalOnClass(NewRelicRegistry.class)
public class MicrometerConfig {
#Bean
public NewRelicRegistryConfig newRelicConfig() {
return new NewRelicRegistryConfig() {
#Override
public String get(String key) {
return null;
}
#Override
public String apiKey() {
return "your_api_key"; // for production purposes take it from config file
}
#Override
public Duration step() {
return Duration.ofSeconds(5);
}
#Override
public String serviceName() {
return "your_service_name"; // take it from config file
}
};
}
#Bean
public NewRelicRegistry newRelicMeterRegistry(NewRelicRegistryConfig config) throws UnknownHostException {
NewRelicRegistry newRelicRegistry = NewRelicRegistry.builder(config)
.commonAttributes(new Attributes().put("host", InetAddress.getLocalHost().getHostName())).build();
newRelicRegistry.config().meterFilter(MeterFilter.ignoreTags("plz_ignore_me"));
newRelicRegistry.config().meterFilter(MeterFilter.denyNameStartsWith("jvm.threads"));
newRelicRegistry.start(new NamedThreadFactory("newrelic.micrometer.registry"));
return newRelicRegistry;
}
}
Run the application.
To view the Application metrics-
Log in to your New Relic account.
Go to Explorer Tab.
Click on Services-OpenTelemetry
You can see the name of your application(which you had mentioned in the MicrometerConfig file) listed there.
Click on the application name.
The dashboard should look something like this.

What are the next steps?
It seems you are done and successfully shipped metrics to NewRelic.
Do I need a local running server of New Relic as I did for Prometheus?
No, NewRelic is a SaaS offering.
Where can I visualize this data? I have an account in New Relic, I see nothing there
It seems you already found it (screenshot).
What does the result of this query indicate? Is it a metric related to my application?
From the screenshot, I can't tell if it is your application but this seems to be the jvm.memory.committed metric pushed by a Spring Boot app (so likely).
In order to see if this is your app or not, you can add common tags which can tell the name of the app and some kind of an instance ID (or hostname?) in case you have multiple instances from the same app, see:
Spring Boot Docs (I would do this)
Micrometer Docs (do this if you don't use Spring Boot or want to do something tricky)
Real-World Example

Default configuration of H2 in-memory database set up by Springboot

I am using H2 database with Spring Boot (version 2.3.3.RELEASE) with all default settings for H2 database.
Here are the all files of my application.
pom.xml
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.3.RELEASE</version>
<relativePath/>
</parent>
<dependencies>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
application.properties
spring.h2.console.enabled=true
Application.java
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;
import java.sql.SQLException;
#SpringBootApplication
public class App {
public static void main(String[] args) {
SpringApplication.run(App.class, args);
}
}
After starting the application when i am trying to connect the H2 database (configured and started by springboot with all default configuration) using below credentials,
I am getting error saying
Database "mem:testDB" not found, either pre-create it or allow remote
database creation
How can I connect to H2 database configured and started by Spring Boot with all the default credentials.
I don't want to override any configuration in application.properties files except spring.h2.console.enabled=true.

In newer version of Spring Boot (2.2+), look for the following log message on your console: Use the JDBC URL to connect on /h2-console page:
Spring Boot 2.2+:
INFO H2ConsoleAutoConfiguration : H2 console available at '/h2-console'. Database available at 'jdbc:h2:mem:testdb'
Spring Boto 2.3+:
INFO H2ConsoleAutoConfiguration : H2 console available at '/h2-console'. Database available at 'jdbc:h2:mem:621dd224-01db-4137-807f-b9c3046de64d'

Only enabling console wouldn't be sufficient, you also need to mention which db you want connect. In your case if you want connect in memory db add below properties as well, then try to connect your in memory db using same creds
spring.datasource.url=jdbc:h2:mem:testdb
spring.datasource.driverClassName=org.h2.Driver
spring.datasource.username=sa
spring.datasource.password=

Spring Boot Freemarker fails from 2.2.0 upgrade

Upon upgrading the spring-boot-parent to 2.2.0.RELEASE, my freemarker based Spring Boot Web application fails to properly serve requests.
I have a #Controller that serves /hello with src/main/resources/templates/hello.ftl.
#Controller
class HelloController() {
#RequestMapping(value = ["/hello"])
fun hello(): String {
return "hello"
}
}
upon request, it just lands on an error page saying There was an unexpected error (type=Not Found, status=404)..
Error stacktrace doesn't say much. It just says org.springframework.web.servlet.resource.ResourceHttpRequestHandler: Resource not found.
My pom.xml is basically as follows:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.0.RELEASE</version>
<relativePath/>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-freemarker</artifactId>
</dependency>
</dependencies>
It worked perfectly fine up until upgrading to Spring Boot 2.2.0.RELEASE.
What's the problem here?
This is a self-answering question as per rules to prevent other poor souls from suffering like I did.

This is due to a breaking change in Spring Boot 2.2.0 with default freemarker suffixes.
Freemarker files should now end with .ftlh rather than .ftl.
.ftlh enables the HTML auto-escape feature.
The commit that changed this can be found here. It aims to fix this issue that freemarker default settings should be safer, which is enabling automatic HTML escapes.
The full changelog for 2.2.0.RELEASE that you should read before upgrading can be found here.

Spring boot MVC: RequestMapping isn't recognized in Spring boot 2.1.4

Can someone answer this silly question - How to configure Thymeleaf in Spring boot release 2.1.4?
I have declared the right dependencies:
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.4.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
Also the config:
#SpringBootApplication
#ComponentScan("org.mystuff.myproj")
#EnableAutoConfiguration
public class Init extends SpringBootServletInitializer{
And the controller looks regular:
#Controller
#RequestMapping("/a")
public class IndexController {
private static final Logger logger = LoggerFactory.getLogger(IndexController.class);
#PostConstruct
private void test() {
logger.info("********************************************************************");
}
#RequestMapping("/")
private String index() {
return "index2";
}
I do see that the #Controller bean gets initiated (the "*****..."), but when I try to locate in the logs the "mapped" or atleast something related, the only thing I find is:
2019-04-23 15:55:15 WARN [localhost-startStop-1] JpaBaseConfiguration$JpaWebConfiguration$JpaWebMvcConfiguration.openEntityManagerInViewInterceptor: 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
2019-04-23 15:55:16 INFO [localhost-startStop-1] WelcomePageHandlerMapping.<init>: Adding welcome page: ServletContext resource [/index.html]
And I'm failing to find an answer to the "What has changed" question.
After a while I realized that Spring Boot 2.1.4 requires TomCat 9, while I was using 8.5.
After this I started to get progress, but still the Thymeleaf isn't working, and if /templates has a index.html, the default Resolver is used, which ignores Thymeleaf's "fragments" and stuff (loads like a regular html page).