[jboss-jira] [JBoss JIRA] (WFLY-4480) Websocket exception using async remote

[Stuart Douglas (JIRA)]

    [ https://issues.jboss.org/browse/WFLY-4480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13056749#comment-13056749 ] 

Stuart Douglas commented on WFLY-4480:
--------------------------------------

This should be fixed in Undertow upstream, although I can't reproduce it so it is hard to be sure.

> Websocket exception using async remote
> --------------------------------------
>
>                 Key: WFLY-4480
>                 URL: https://issues.jboss.org/browse/WFLY-4480
>             Project: WildFly
>          Issue Type: Bug
>          Components: Web Sockets
>    Affects Versions: 9.0.0.Beta2
>            Reporter: nicolas desmaziers
>            Assignee: Stuart Douglas
>
> Sending binary messages on the  AsyncRemote endpoint throws an error in the log:
> 21:11:28,747 ERROR [org.xnio.listener] (default I/O-6) XNIO001007: A channel event listener threw an exception: java.lang.IllegalStateException: XNIO000017: Buffer was already freed
> 	at org.xnio.ByteBufferSlicePool$PooledByteBuffer.getResource(ByteBufferSlicePool.java:206)
> 	at org.xnio.ByteBufferSlicePool$PooledByteBuffer.getResource(ByteBufferSlicePool.java:176)
> 	at io.undertow.server.protocol.framed.AbstractFramedChannel.flushSenders(AbstractFramedChannel.java:490)
> 	at io.undertow.server.protocol.framed.AbstractFramedChannel$FrameWriteListener.handleEvent(AbstractFramedChannel.java:793)
> 	at io.undertow.server.protocol.framed.AbstractFramedChannel$FrameWriteListener.handleEvent(AbstractFramedChannel.java:790)
> 	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
> 	at org.xnio.conduits.WriteReadyHandler$ChannelListenerHandler.writeReady(WriteReadyHandler.java:65)
> 	at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:93)
> 	at org.xnio.nio.WorkerThread.run(WorkerThread.java:539)
> This happens after a few minutes and generally the number of errors increase rapidly and we can easily have a 2Go log after a few hours.
> Code is:
> session.getAsyncRemote.sendBinary(event.asReadOnlyBuffer(), new SendHandler(){
>           override def onResult(result:SendResult) {
>           }
>         })
> It worked well with wildly 9.0 alpha 1 but bug appeared with beta 2.
> I generally receive a close event on the web socket session after the error logging.



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