a.i.TcpListener - Bind failed for TCP channel on endpoint [/127.0.0.1:2551] java.net.BindException: [/127.0.0.1:2551] Address already in use

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When i am trying to create a Typed Actor System using the object. It is normally creating the Actor System.

   implicit val askTimeout: Timeout = Timeout(5.seconds)
   ActorSystem[Nothing](MailSendActor.apply, "application")
 }

where MailSendACtor is my class which is calling the Actor.

But same thing when i am trying to do with play application i am getting error and it is not even creating teh ActorSystem.

java.net.BindException: [/127.0.0.1:2551] Address already in use
        at sun.nio.ch.Net.bind0(Native Method)
    at sun.nio.ch.Net.bind(Net.java:433)
    at sun.nio.ch.Net.bind(Net.java:425)
    at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
    at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
    at akka.io.TcpListener.liftedTree1$1(TcpListener.scala:60)
    at akka.io.TcpListener.<init>(TcpListener.scala:57)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
[error] p.a.h.DefaultHttpErrorHandler -
! @7g90lm1hi - Internal server error, for (GET) [/message] ->
play.api.http.HttpErrorHandlerExceptions$$anon$1: Execution exception[[RemoteTransportException: Failed to bind TCP to [127.0.0.1:2551] due to: Bind failed because of java.net.BindException: [/127.0.0.1:2551] Address already in use]]
    at play.api.http.HttpErrorHandlerExceptions$.throwableToUsefulException(HttpErrorHandler.scala:359)
    at play.api.http.DefaultHttpErrorHandler.onServerError(HttpErrorHandler.scala:261)
    at play.core.server.AkkaHttpServer$$anonfun$2.applyOrElse(AkkaHttpServer.scala:429)
    at play.core.server.AkkaHttpServer$$anonfun$2.applyOrElse(AkkaHttpServer.scala:421)
    at scala.concurrent.Future.$anonfun$recoverWith$1(Future.scala:413)
    at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:37)
    at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:60)
    at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:56)
    at akka.dispatch.BatchingExecutor$BlockableBatch.$anonfun$run$1(BatchingExecutor.scala:93)
    at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:12)
Caused by: akka.remote.RemoteTransportException: Failed to bind TCP to [127.0.0.1:2551] due to: Bind failed because of java.net.BindException: [/127.0.0.1:2551] Address already in use
    at akka.remote.artery.tcp.ArteryTcpTransport$$anonfun$4.applyOrElse(ArteryTcpTransport.scala:275)
    at akka.remote.artery.tcp.ArteryTcpTransport$$anonfun$4.applyOrElse(ArteryTcpTransport.scala:269)
    at scala.concurrent.Future.$anonfun$recoverWith$1(Future.scala:413)
    at scala.concurrent.impl.Promise.$anonfun$transformWith$1(Promise.scala:37)
    at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:60)
    at akka.dispatch.BatchingExecutor$AbstractBatch.processBatch(BatchingExecutor.scala:56)
    at akka.dispatch.BatchingExecutor$Batch.run(BatchingExecutor.scala:74)
    at akka.dispatch.internal.SameThreadExecutionContext$$anon$1.unbatchedExecute(SameThreadExecutionContext.scala:21)
    at akka.dispatch.BatchingExecutor.execute(BatchingExecutor.scala:123)
    at akka.dispatch.BatchingExecutor.execute$(BatchingExecutor.scala:117)
Caused by: akka.stream.impl.io.ConnectionSourceStage$$anon$1$$anon$2: Bind failed because of java.net.BindException: [/127.0.0.1:2551] Address already in use
Caused by: java.net.BindException: [/127.0.0.1:2551] Address already in use
    at sun.nio.ch.Net.bind0(Native Method)
    at sun.nio.ch.Net.bind(Net.java:433)
    at sun.nio.ch.Net.bind(Net.java:425)
    at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223)
    at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74)
    at akka.io.TcpListener.liftedTree1$1(TcpListener.scala:60)
    at akka.io.TcpListener.<init>(TcpListener.scala:57)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

Is there any reason?

akka-typed akka-cluster playback akka scala
2 Answers

Port 2551 are already used by some process, either stop any process running port number 2551 or change the port number of your Actor system and then start it.

user_40499530

I had a similar problem. In some cases, it can happen from having a parallel process using the same port number, but it is not always the case.

I did the following steps:

  1. First, I used netstat to view active processes to eliminate parallel processes - netstat -vanp tcp | grep <PORT_NUMBER> - In my case, I haven't found any parallel process.

  2. I have checked the localhost network traffic using Wireshark - filter based on tcp.port == <PORT_NUMBER> - and I have seen traffic-related only to my application

In my case, my conclusion was internal application problem with routes management, hope this helps.

user_104552570
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