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Posted to dev@synapse.apache.org by "Supun Kamburugamuva (JIRA)" <ji...@apache.org> on 2011/04/20 08:44:06 UTC
[jira] [Resolved] (SYNAPSE-740) Synapse throws
"org.apache.http.ProtocolException: Transfer-encoding header already
present" on multiple sends to client
[ https://issues.apache.org/jira/browse/SYNAPSE-740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Supun Kamburugamuva resolved SYNAPSE-740.
-----------------------------------------
Resolution: Fixed
Applied the patch. Many thanks to Undayanga for the contribution
> Synapse throws "org.apache.http.ProtocolException: Transfer-encoding header already present" on multiple sends to client
> -------------------------------------------------------------------------------------------------------------------------
>
> Key: SYNAPSE-740
> URL: https://issues.apache.org/jira/browse/SYNAPSE-740
> Project: Synapse
> Issue Type: Bug
> Components: Transports
> Reporter: Udayanga Wickramasinghe
> Attachments: synapse_SYNAPSE-740.patch
>
>
> <sequence name="main">
> <in>
> <property name="direction" value="incoming"/>
> <sequence key="stockquote"/>
> </in>
> <out>
> <send/>
> <send/>
> </out>
> </sequence>
> For a configuration with multiple sends as shown above synapse throws following error ;
> 2011-03-11 10:59:21,844 [-] [HttpClientWorker-1] ERROR HttpCoreNIOSender Unexpected HTTP protocol error sending response to : 127.0.0.1
> org.apache.http.ProtocolException: Transfer-encoding header already present
> at org.apache.http.protocol.ResponseContent.process(ResponseContent.java:63)
> at org.apache.http.protocol.BasicHttpProcessor.process(BasicHttpProcessor.java:211)
> at org.apache.synapse.transport.nhttp.ServerHandler.commitResponse(ServerHandler.java:374)
> at org.apache.synapse.transport.nhttp.HttpCoreNIOSender.sendAsyncResponse(HttpCoreNIOSender.java:513)
> at org.apache.synapse.transport.nhttp.HttpCoreNIOSender.invoke(HttpCoreNIOSender.java:311)
> at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:443)
> at org.apache.synapse.core.axis2.Axis2Sender.sendBack(Axis2Sender.java:159)
> at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:254)
> at org.apache.synapse.mediators.builtin.SendMediator.mediate(SendMediator.java:84)
> at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:60)
> at org.apache.synapse.mediators.filters.OutMediator.mediate(OutMediator.java:55)
> at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:60)
> at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:114)
> at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:176)
> at org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:364)
> at org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:159)
> at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:181)
> at org.apache.synapse.transport.nhttp.ClientWorker.run(ClientWorker.java:252)
> at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:173)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> 2011-03-11 10:59:21,845 [-] [HttpClientWorker-1] ERROR Axis2Sender Unexpected error sending message back
> org.apache.axis2.AxisFault: Unexpected HTTP protocol error sending response to : 127.0.0.1
> at org.apache.synapse.transport.nhttp.HttpCoreNIOSender.handleException(HttpCoreNIOSender.java:818)
> at org.apache.synapse.transport.nhttp.HttpCoreNIOSender.sendAsyncResponse(HttpCoreNIOSender.java:544)
> at org.apache.synapse.transport.nhttp.HttpCoreNIOSender.invoke(HttpCoreNIOSender.java:311)
> at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:443)
> at org.apache.synapse.core.axis2.Axis2Sender.sendBack(Axis2Sender.java:159)
> at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:254)
> at org.apache.synapse.mediators.builtin.SendMediator.mediate(SendMediator.java:84)
> at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:60)
> at org.apache.synapse.mediators.filters.OutMediator.mediate(OutMediator.java:55)
> at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:60)
> at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:114)
> at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:176)
> at org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:364)
> at org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:159)
> at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:181)
> at org.apache.synapse.transport.nhttp.ClientWorker.run(ClientWorker.java:252)
> at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:173)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> Caused by: org.apache.http.ProtocolException: Transfer-encoding header already present
> at org.apache.http.protocol.ResponseContent.process(ResponseContent.java:63)
> at org.apache.http.protocol.BasicHttpProcessor.process(BasicHttpProcessor.java:211)
> at org.apache.synapse.transport.nhttp.ServerHandler.commitResponse(ServerHandler.java:374)
> at org.apache.synapse.transport.nhttp.HttpCoreNIOSender.sendAsyncResponse(HttpCoreNIOSender.java:513)
> ... 18 more
> 2011-03-11 10:59:21,846 [-] [HttpClientWorker-1] ERROR SynapseCallbackReceiver Synapse encountered an exception, No error handlers found - [Message Dropped]
> Unexpected error sending message back
> It is better if we just gracefully log this as error rather than throwing a Fault
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