From: "Karthick V.J." <karthickjagan(a)yahoo.com&gt; To: undertow-dev(a)lists.jboss.org Sent: Thursday, 25 December, 2014 11:18:31 AM Subject: [undertow-dev] SEVERE: UT000004: getResponseChannel() has already been called Hi Undertow Devs, I was getting the below error in my application. I created a sample application which throws the same error (Attached is the sample applicaiton) When I added the exchange.dispatch() statement at line 158, the problem resolves. Is it required to dispatch () every time the context is switched to a new thread. Am I doing it right? Thank You - Karthick Error: ------------ SEVERE: UT000004: getResponseChannel() has already been called java.lang.IllegalStateException: UT000004: getResponseChannel() has already been called at io.undertow.io.AsyncSenderImpl.send(AsyncSenderImpl.java:208) at io.undertow.io.AsyncSenderImpl.send(AsyncSenderImpl.java:294) at io.undertow.io.AsyncSenderImpl.send(AsyncSenderImpl.java:270) at io.undertow.io.AsyncSenderImpl.send(AsyncSenderImpl.java:300) ..... ..... ..... ..... at com.google.common.util.concurrent.Futures$4.run(Futures.java:1181) at com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:297) at com.google.common.util.concurrent.ExecutionList.executeListener(ExecutionList.java:156) at com.google.common.util.concurrent.ExecutionList.execute(ExecutionList.java:145) at com.google.common.util.concurrent.AbstractFuture.set(AbstractFuture.java:185) at com.google.common.util.concurrent.Futures$ChainingListenableFuture$1.run(Futures.java:872) at com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:297) at com.google.common.util.concurrent.Futures$ImmediateFuture.addListener(Futures.java:102) at com.google.common.util.concurrent.Futures$ChainingListenableFuture.run(Futures.java:868) at com.google.common.util.concurrent.MoreExecutors$SameThreadExecutorService.execute(MoreExecutors.java:297) at com.google.common.util.concurrent.ExecutionList.executeListener(ExecutionList.java:156) at com.google.common.util.concurrent.ExecutionList.execute(ExecutionList.java:145) at com.google.common.util.concurrent.AbstractFuture.set(AbstractFuture.java:185) at com.datastax.driver.core.DefaultResultSetFuture.onSet(DefaultResultSetFuture.java:105) at com.datastax.driver.core.RequestHandler.setFinalResult(RequestHandler.java:246) at com.datastax.driver.core.RequestHandler.onSet(RequestHandler.java:278) at com.datastax.driver.core.Connection$Dispatcher.messageReceived(Connection.java:661) at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70) at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564) at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791) at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296) at org.jboss.netty.handler.codec.oneone.OneToOneDecoder.handleUpstream(OneToOneDecoder.java:70) at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564) at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:791) at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296) at org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:462) at org.jboss.netty.handler.codec.frame.FrameDecoder.callDecode(FrameDecoder.java:443) at org.jboss.netty.handler.codec.frame.FrameDecoder.messageReceived(FrameDecoder.java:303) at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70) at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564) at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559) at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268) at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255) at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88) at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:108) at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:318) at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89) at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178) at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108) at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:745) ------------ _______________________________________________ undertow-dev mailing list undertow-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/undertow-dev