Connection Refused EC2

[studentaws01]

Hello otlp community,
I am trying opentelemetry on my EC2 for the first time and am following this tutorial but I keep getting this error

`[opentelemetry.auto.trace 2021-02-05 22:15:33:217 +0000] [grpc-default-executor-0] WARN io.opentelemetry.exporter.otlp.OtlpGrpcMetricExporter - Failed to export metrics
io.grpc.StatusRuntimeException: UNAVAILABLE: io exception
at io.grpc.Status.asRuntimeException(Status.java:533)
at io.grpc.stub.ClientCalls$UnaryStreamToFuture.onClose(ClientCalls.java:533)
at io.grpc.internal.ClientCallImpl.closeObserver(ClientCallImpl.java:617)
at io.grpc.internal.ClientCallImpl.access$300(ClientCallImpl.java:70)
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInternal(ClientCallImpl.java:803)
at io.grpc.internal.ClientCallImpl$ClientStreamListenerImpl$1StreamClosed.runInContext(ClientCallImpl.java:782)
at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
at io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)

Caused by: io.grpc.netty.shaded.io.netty.channel.AbstractChannel$AnnotatedConnectException: finishConnect(..) failed:

Connection refused: localhost/127.0.0.1:4317

Caused by: java.net.ConnectException: finishConnect(..) failed: Connection refused
at io.grpc.netty.shaded.io.netty.channel.unix.Errors.throwConnectException(Errors.java:124)
at io.grpc.netty.shaded.io.netty.channel.unix.Socket.finishConnect(Socket.java:243)
at io.grpc.netty.shaded.io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.doFinishConnect(AbstractEpollChannel.java:672)
at io.grpc.netty.shaded.io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.finishConnect(AbstractEpollChannel.java:649)
at io.grpc.netty.shaded.io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe.epollOutReady(AbstractEpollChannel.java:529)
at io.grpc.netty.shaded.io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:465)
at io.grpc.netty.shaded.io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:378)
at io.grpc.netty.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
at io.grpc.netty.shaded.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
at io.grpc.netty.shaded.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
at java.lang.Thread.run(Thread.java:748)`

I have tried running the collector via docker

and also usingEC2 installation but no luck.

The collector process runs and seems to be ok. I see this in the logs
2021-02-05 22:11:24.791973929 +0000 UTC m=+0.089273139, Level:info, Caller:go.opentelemetry.io/[email protected]/service/service.go:267, Message:Everything is ready. Begin running and processing data., Stack:}

Here is the command that I use to run the spring boot app
java -javaagent:/home/ssm-user/aws-opentelemetry-agent.jar -Dotel.exporter=otlp -Dotel.resource.attributes=service.name=MyTest -jar spring-petclinic-2.4.2.jar

Any help to get this working would be much appreciated.

[iNikem]

If you follow AWS tutorial and have problems with AWS distribution of the Collector, maybe it worth asking for help in https://github.com/aws-observability/aws-otel-collector repo?