Micronaut-core: eureka service discovery doesn't work with native-image

[ustari28]

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Task List

• [ ] Steps to reproduce provided
• [ ] Stacktrace (if present) provided
• [ ] Example that reproduces the problem uploaded to Github
• [ ] Full description of the issue provided (see below)

Steps to Reproduce

It's necessary to have a eureka server started.

1. Use eureka service discovery feature.
2. Compile with micronaut 1.2.2 and graalvm-ce-19.2.1/native-image into docker image.
   2.1. mvn clean package
   2.2. docker build . -t imagedocker:version
3. Start imagen docker
   3.1. docker run -p 8080:8080 -e EUREKA_SERVER=URL_EUREKA_SERVER --HOSTNAME=NAMEOFINSTANCE imagedocker:version

Expected Behaviour

Start the service and registered to eureka server

Actual Behaviour

The register to eureka server fails

Environment Information

• Operating System: docker image oracle/graalvm-ce:19.2.1
• Micronaut Version: 1.2.2
• JDK Version: graalvm-ce:19.2.1

Example Application

• Github

When I compile without native-image and use java-jar command the application works, but when I compile with native-image from graalvm-ce-19.2.1 the application doesn't work correctly.
08:27:43.837 [main] INFO io.micronaut.runtime.Micronaut - Startup completed in 46ms. Server Running: http://mn-first-rest-3:8080 08:27:48.862 [nioEventLoopGroup-2-3] INFO i.m.d.registration.AutoRegistration - Instance [mn-first-rest-3] no longer registered with Eureka. Attempting re-registration. 08:27:48.891 [nioEventLoopGroup-2-4] ERROR i.m.d.registration.AutoRegistration - Error reporting state to Eureka: io.micronaut.http.client.exceptions.HttpClientResponseException: at io.micronaut.http.client.DefaultHttpClient$10.channelRead0(DefaultHttpClient.java:1816) at io.micronaut.http.client.DefaultHttpClient$10.channelRead0(DefaultHttpClient.java:1756) at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) at io.micronaut.http.netty.stream.HttpStreamsHandler.channelRead(HttpStreamsHandler.java:185) at io.micronaut.http.netty.stream.HttpStreamsClientHandler.channelRead(HttpStreamsClientHandler.java:180) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:374) at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:360) at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:352) at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:438)

[ustari28]

is there any piece of news about this issue?

[graemerocher]

Not yet, will take a look soon...

[prakis]

Is there any update on this?
Any workarounds for registering to Eureka from native compiled micronaut application?

Thanks

[anthonyrichir]

I would love to see this fixed as well, I've been trying to fix it but I don't think I'm on the right path so far.

[graemerocher]

@ilopmar could you take a look at this one?

[ilopmar]

@graemerocher sure, added to my list.

[prakis]

In the meantime the following code snippet will help you to register to Eureka (it compiles to native code) .

https://github.com/sandhya-grl/micronaut_eureka_client/blob/master/EurekaRegistration.java

[ilopmar]

I've submitted a PR with the fix: https://github.com/micronaut-projects/micronaut-core/pull/3379

@ustari28 @prakis @anthonyrichir I've also created a test application that I'll add to our test suite once the PR is merged: https://github.com/micronaut-graal-tests/micronaut-service-discovery-eureka/ (look at master or 1.3.x depending the Micronaut version you are using)