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From Oleg Kalnichevski <ol...@apache.org>
Subject Re: Using Simple Input/Output Buffers with Synapse
Date Thu, 22 May 2008 17:37:45 GMT
Asankha C. Perera wrote:
> Hi Oleg
> 
> I first tried to do the throttling version for Synapse, but didn't 
> really get to a stable point last night.. and thus, looked at using the 
> simple buffers first as you suggested..
> 
> I am now getting the following exception, and am trying to figure out 
> what went wrong.. but I will have to put some debug information into the 
> org.apache.http.nio.util classes and debug, as I cannot get much useful 
> information from the JDK classes when this happens as they do not 
> contain any debug information.. I am just sharing this upfront with you 
> to see if you have any suggestion on what the cause may be
> 
> java.lang.IllegalArgumentException
>    at java.nio.Buffer.position(Buffer.java:218)
>    at java.nio.HeapByteBuffer.put(HeapByteBuffer.java:186)
>    at 
> org.apache.http.nio.util.ExpandableBuffer.expandCapacity(ExpandableBuffer.java:81) 
> 
>    at 
> org.apache.http.nio.util.ExpandableBuffer.ensureCapacity(ExpandableBuffer.java:94) 
> 
>    at 
> org.apache.http.nio.util.SimpleOutputBuffer.write(SimpleOutputBuffer.java:63) 
> 
> 
> thanks
> asankha

Hi Asankha

I am sorry I could not get back to you sooner.

I think this is because SimpleOutputBuffer is not threading safe. 
Synapse is writing to and reading from the buffer from different 
threads. You must make sure the access to the underlying HeapByteBuffer 
is synchronized.

Oleg


> 
> Here is a cut down of the full stack trace...
> 
> 2008-05-22 11:22:26,042 [127.0.1.1-asankha] [I/O dispatcher 5] DEBUG 
> ServerHandler HTTP connection [/127.0.0.1:22817]: Connected
> 2008-05-22 11:22:26,061 [127.0.1.1-asankha] [I/O dispatcher 5] DEBUG 
> ServerHandler HTTP connection [/127.0.0.1:22817]: POST 
> /soap/MyServiceProxy HTTP/1.1
> 2008-05-22 11:22:26,082 [127.0.1.1-asankha] [I/O dispatcher 5] DEBUG 
> headers >> POST /soap/MyServiceProxy HTTP/1.1
> 2008-05-22 11:22:26,082 [127.0.1.1-asankha] [I/O dispatcher 5] DEBUG 
> headers >> SOAPAction:  urn:echo
> 2008-05-22 11:22:26,082 [127.0.1.1-asankha] [I/O dispatcher 5] DEBUG 
> headers >> Transfer-Encoding: chunked
> 2008-05-22 11:22:26,082 [127.0.1.1-asankha] [I/O dispatcher 5] DEBUG 
> headers >> Content-Type: application/soap+xml; charset=UTF-8
> 2008-05-22 11:22:26,082 [127.0.1.1-asankha] [I/O dispatcher 5] DEBUG 
> headers >> Host: localhost:8080
> 2008-05-22 11:22:26,082 [127.0.1.1-asankha] [I/O dispatcher 5] DEBUG 
> headers >> Connection: Keep-Alive
> 2008-05-22 11:22:26,082 [127.0.1.1-asankha] [I/O dispatcher 5] DEBUG 
> headers >> User-Agent: Jakarta-HttpComponents-Bench/1.1
> 2008-05-22 11:22:26,082 [127.0.1.1-asankha] [I/O dispatcher 5] DEBUG 
> ServerHandler HTTP connection [localhost/127.0.0.1:22817]: Input ready
> 2008-05-22 11:22:26,103 [127.0.1.1-asankha] [I/O dispatcher 5] DEBUG 
> ServerHandler HTTP connection [localhost/127.0.0.1:22817]: Content 
> decoder [chunk-coded; completed: false]
> ....
> 2008-05-22 11:22:26,204 [127.0.1.1-asankha] [HttpServerWorker-1] DEBUG 
> HttpCoreNIOSender A new connection established to : localhost:9000
> 2008-05-22 11:22:26,204 [127.0.1.1-asankha] [HttpServerWorker-1] DEBUG 
> Axis2HttpRequest start streaming outgoing http request
> 2008-05-22 11:22:26,205 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> ClientHandler HTTP connection [localhost/127.0.0.1:9000]: Connected 
> (org.apache.synapse.transport.nhttp.Axis2HttpRequest@155d4be)
> 2008-05-22 11:22:26,205 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> ClientHandler ClientHandler connected : [localhost/127.0.0.1:9000]
> 2008-05-22 11:22:26,209 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> headers >> POST http://localhost:9000/axis2/services/MyService HTTP/1.1
> 2008-05-22 11:22:26,210 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> headers >> Host: localhost:8080
> 2008-05-22 11:22:26,210 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> headers >> SOAPAction: urn:echo
> 2008-05-22 11:22:26,210 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> headers >> Content-Type: application/soap+xml; charset=UTF-8; 
> action="urn:echo"
> 2008-05-22 11:22:26,210 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> headers >> Transfer-Encoding: chunked
> 2008-05-22 11:22:26,210 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> headers >> Connection: Keep-Alive
> 2008-05-22 11:22:26,210 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> headers >> User-Agent: Synapse-HttpComponents-NIO
> 2008-05-22 11:22:26,210 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> ClientHandler HTTP connection [localhost/127.0.0.1:9000]: Output ready
> 2008-05-22 11:22:26,211 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> ClientHandler HTTP connection [localhost/127.0.0.1:9000]: Content 
> encoder [chunk-coded; completed: false]
> ....
> 2008-05-22 11:22:26,425 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> ClientHandler HTTP connection [localhost/127.0.0.1:9000]: Output ready
> 2008-05-22 11:22:26,425 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> ClientHandler HTTP connection [localhost/127.0.0.1:9000]: Content 
> encoder [chunk-coded; completed: false]
> 2008-05-22 11:22:26,425 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> ClientHandler HTTP connection [localhost/127.0.0.1:9000]: Output ready
> 2008-05-22 11:22:26,429 [127.0.1.1-asankha] [HttpServerWorker-1] ERROR 
> Axis2HttpRequest Error streaming message context
> java.lang.IllegalArgumentException
>    at java.nio.Buffer.position(Buffer.java:218)
>    at java.nio.HeapByteBuffer.put(HeapByteBuffer.java:186)
>    at 
> org.apache.http.nio.util.ExpandableBuffer.expandCapacity(ExpandableBuffer.java:81) 
> 
>    at 
> org.apache.http.nio.util.ExpandableBuffer.ensureCapacity(ExpandableBuffer.java:94) 
> 
>    at 
> org.apache.http.nio.util.SimpleOutputBuffer.write(SimpleOutputBuffer.java:63) 
> 
>    at 
> org.apache.http.nio.entity.ContentOutputStream.write(ContentOutputStream.java:63) 
> 
>    at com.ctc.wstx.io.UTF8Writer.write(UTF8Writer.java:139)
>    at 
> com.ctc.wstx.sw.BufferingXmlWriter.writeRaw(BufferingXmlWriter.java:259)
>    at 
> com.ctc.wstx.sw.BufferingXmlWriter.writeCharacters(BufferingXmlWriter.java:543) 
> 
>    at 
> com.ctc.wstx.sw.BaseStreamWriter.writeCharacters(BaseStreamWriter.java:509)
>    at 
> org.apache.axiom.om.impl.MTOMXMLStreamWriter.writeCharacters(MTOMXMLStreamWriter.java:237)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMTextImpl.writeOutput(OMTextImpl.java:255)
>    at 
> org.apache.axiom.om.impl.llom.OMTextImpl.internalSerializeLocal(OMTextImpl.java:414)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMTextImpl.internalSerialize(OMTextImpl.java:243) 
> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:905)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:889)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:905)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:889)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:905)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:889)

> 
>    at 
> org.apache.axiom.soap.impl.llom.SOAPEnvelopeImpl.internalSerialize(SOAPEnvelopeImpl.java:213)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:889)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMNodeImpl.serialize(OMNodeImpl.java:450)
>    at 
> org.apache.axis2.transport.http.SOAPMessageFormatter.writeTo(SOAPMessageFormatter.java:77)

> 
>    at 
> org.apache.synapse.transport.nhttp.Axis2HttpRequest.streamMessageContents(Axis2HttpRequest.java:214)

> 
>    at 
> org.apache.synapse.transport.nhttp.HttpCoreNIOSender.sendAsyncRequest(HttpCoreNIOSender.java:346)

> 
>    at 
> org.apache.synapse.transport.nhttp.HttpCoreNIOSender.invoke(HttpCoreNIOSender.java:256)

> 
>    at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:448)
>    at 
> org.apache.synapse.core.axis2.DynamicAxisOperation$DynamicOperationClient.send(DynamicAxisOperation.java:190)

> 
>    at 
> org.apache.synapse.core.axis2.DynamicAxisOperation$DynamicOperationClient.executeImpl(DynamicAxisOperation.java:174)

> 
>    at 
> org.apache.axis2.client.OperationClient.execute(OperationClient.java:163)
>    at 
> org.apache.synapse.core.axis2.Axis2FlexibleMEPClient.send(Axis2FlexibleMEPClient.java:282)

> 
>    at org.apache.synapse.core.axis2.Axis2Sender.sendOn(Axis2Sender.java:57)
>    at 
> org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:222)

> 
>    at 
> org.apache.synapse.endpoints.AddressEndpoint.send(AddressEndpoint.java:202)
>    at 
> org.apache.synapse.core.axis2.ProxyServiceMessageReceiver.receive(ProxyServiceMessageReceiver.java:179)

> 
>    at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:176)
>    at 
> org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)

> 
>    at 
> org.apache.synapse.transport.nhttp.ServerWorker.processPost(ServerWorker.java:238) 
> 
>    at 
> org.apache.synapse.transport.nhttp.ServerWorker.run(ServerWorker.java:194)
>    at 
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650) 
> 
>    at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675) 
> 
>    at java.lang.Thread.run(Thread.java:595)
> 2008-05-22 11:22:26,431 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> ClientHandler HTTP connection [localhost/127.0.0.1:9000]: Content 
> encoder [chunk-coded; completed: false]
> 2008-05-22 11:22:26,434 [127.0.1.1-asankha] [HttpServerWorker-1] ERROR 
> HttpCoreNIOSender IO Error while submiting request message for sending
> org.apache.axis2.AxisFault: Error streaming message context
>    at 
> org.apache.synapse.transport.nhttp.Axis2HttpRequest.handleException(Axis2HttpRequest.java:245)

> 
>    at 
> org.apache.synapse.transport.nhttp.Axis2HttpRequest.streamMessageContents(Axis2HttpRequest.java:228)

> 
>    at 
> org.apache.synapse.transport.nhttp.HttpCoreNIOSender.sendAsyncRequest(HttpCoreNIOSender.java:346)

> 
>    at 
> org.apache.synapse.transport.nhttp.HttpCoreNIOSender.invoke(HttpCoreNIOSender.java:256)

> 
>    at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:448)
>    at 
> org.apache.synapse.core.axis2.DynamicAxisOperation$DynamicOperationClient.send(DynamicAxisOperation.java:190)

> 
>    at 
> org.apache.synapse.core.axis2.DynamicAxisOperation$DynamicOperationClient.executeImpl(DynamicAxisOperation.java:174)

> 
>    at 
> org.apache.axis2.client.OperationClient.execute(OperationClient.java:163)
>    at 
> org.apache.synapse.core.axis2.Axis2FlexibleMEPClient.send(Axis2FlexibleMEPClient.java:282)

> 
>    at org.apache.synapse.core.axis2.Axis2Sender.sendOn(Axis2Sender.java:57)
>    at 
> org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:222)

> 
>    at 
> org.apache.synapse.endpoints.AddressEndpoint.send(AddressEndpoint.java:202)
>    at 
> org.apache.synapse.core.axis2.ProxyServiceMessageReceiver.receive(ProxyServiceMessageReceiver.java:179)

> 
>    at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:176)
>    at 
> org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)

> 
>    at 
> org.apache.synapse.transport.nhttp.ServerWorker.processPost(ServerWorker.java:238) 
> 
>    at 
> org.apache.synapse.transport.nhttp.ServerWorker.run(ServerWorker.java:194)
>    at 
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650) 
> 
>    at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675) 
> 
>    at java.lang.Thread.run(Thread.java:595)
> Caused by: java.lang.IllegalArgumentException
>    at java.nio.Buffer.position(Buffer.java:218)
>    at java.nio.HeapByteBuffer.put(HeapByteBuffer.java:186)
>    at 
> org.apache.http.nio.util.ExpandableBuffer.expandCapacity(ExpandableBuffer.java:81) 
> 
>    at 
> org.apache.http.nio.util.ExpandableBuffer.ensureCapacity(ExpandableBuffer.java:94) 
> 
>    at 
> org.apache.http.nio.util.SimpleOutputBuffer.write(SimpleOutputBuffer.java:63) 
> 
>    at 
> org.apache.http.nio.entity.ContentOutputStream.write(ContentOutputStream.java:63) 
> 
>    at com.ctc.wstx.io.UTF8Writer.write(UTF8Writer.java:139)
>    at 
> com.ctc.wstx.sw.BufferingXmlWriter.writeRaw(BufferingXmlWriter.java:259)
>    at 
> com.ctc.wstx.sw.BufferingXmlWriter.writeCharacters(BufferingXmlWriter.java:543) 
> 
>    at 
> com.ctc.wstx.sw.BaseStreamWriter.writeCharacters(BaseStreamWriter.java:509)
>    at 
> org.apache.axiom.om.impl.MTOMXMLStreamWriter.writeCharacters(MTOMXMLStreamWriter.java:237)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMTextImpl.writeOutput(OMTextImpl.java:255)
>    at 
> org.apache.axiom.om.impl.llom.OMTextImpl.internalSerializeLocal(OMTextImpl.java:414)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMTextImpl.internalSerialize(OMTextImpl.java:243) 
> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:905)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:889)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:905)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:889)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:905)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:889)

> 
>    at 
> org.apache.axiom.soap.impl.llom.SOAPEnvelopeImpl.internalSerialize(SOAPEnvelopeImpl.java:213)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:889)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMNodeImpl.serialize(OMNodeImpl.java:450)
>    at 
> org.apache.axis2.transport.http.SOAPMessageFormatter.writeTo(SOAPMessageFormatter.java:77)

> 
>    at 
> org.apache.synapse.transport.nhttp.Axis2HttpRequest.streamMessageContents(Axis2HttpRequest.java:214)

> 
>    ... 18 more
> 2008-05-22 11:22:26,434 [127.0.1.1-asankha] [I/O dispatcher 3] DEBUG 
> ClientHandler HTTP connection [localhost/127.0.0.1:9000]: Output ready
> 2008-05-22 11:22:26,435 [127.0.1.1-asankha] [HttpServerWorker-1] ERROR 
> Axis2Sender Unexpected error during sending message out
> org.apache.axis2.AxisFault: IO Error while submiting request message for 
> sending
>    at 
> org.apache.synapse.transport.nhttp.HttpCoreNIOSender.handleException(HttpCoreNIOSender.java:541)

> 
>    at 
> org.apache.synapse.transport.nhttp.HttpCoreNIOSender.sendAsyncRequest(HttpCoreNIOSender.java:351)

> 
>    at 
> org.apache.synapse.transport.nhttp.HttpCoreNIOSender.invoke(HttpCoreNIOSender.java:256)

> 
>    at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:448)
>    at 
> org.apache.synapse.core.axis2.DynamicAxisOperation$DynamicOperationClient.send(DynamicAxisOperation.java:190)

> 
>    at 
> org.apache.synapse.core.axis2.DynamicAxisOperation$DynamicOperationClient.executeImpl(DynamicAxisOperation.java:174)

> 
>    at 
> org.apache.axis2.client.OperationClient.execute(OperationClient.java:163)
>    at 
> org.apache.synapse.core.axis2.Axis2FlexibleMEPClient.send(Axis2FlexibleMEPClient.java:282)

> 
>    at org.apache.synapse.core.axis2.Axis2Sender.sendOn(Axis2Sender.java:57)
>    at 
> org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:222)

> 
>    at 
> org.apache.synapse.endpoints.AddressEndpoint.send(AddressEndpoint.java:202)
>    at 
> org.apache.synapse.core.axis2.ProxyServiceMessageReceiver.receive(ProxyServiceMessageReceiver.java:179)

> 
>    at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:176)
>    at 
> org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)

> 
>    at 
> org.apache.synapse.transport.nhttp.ServerWorker.processPost(ServerWorker.java:238) 
> 
>    at 
> org.apache.synapse.transport.nhttp.ServerWorker.run(ServerWorker.java:194)
>    at 
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650) 
> 
>    at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675) 
> 
>    at java.lang.Thread.run(Thread.java:595)
> Caused by: org.apache.axis2.AxisFault: Error streaming message context
>    at 
> org.apache.synapse.transport.nhttp.Axis2HttpRequest.handleException(Axis2HttpRequest.java:245)

> 
>    at 
> org.apache.synapse.transport.nhttp.Axis2HttpRequest.streamMessageContents(Axis2HttpRequest.java:228)

> 
>    at 
> org.apache.synapse.transport.nhttp.HttpCoreNIOSender.sendAsyncRequest(HttpCoreNIOSender.java:346)

> 
>    ... 17 more
> Caused by: java.lang.IllegalArgumentException
>    at java.nio.Buffer.position(Buffer.java:218)
>    at java.nio.HeapByteBuffer.put(HeapByteBuffer.java:186)
>    at 
> org.apache.http.nio.util.ExpandableBuffer.expandCapacity(ExpandableBuffer.java:81) 
> 
>    at 
> org.apache.http.nio.util.ExpandableBuffer.ensureCapacity(ExpandableBuffer.java:94) 
> 
>    at 
> org.apache.http.nio.util.SimpleOutputBuffer.write(SimpleOutputBuffer.java:63) 
> 
>    at 
> org.apache.http.nio.entity.ContentOutputStream.write(ContentOutputStream.java:63) 
> 
>    at com.ctc.wstx.io.UTF8Writer.write(UTF8Writer.java:139)
>    at 
> com.ctc.wstx.sw.BufferingXmlWriter.writeRaw(BufferingXmlWriter.java:259)
>    at 
> com.ctc.wstx.sw.BufferingXmlWriter.writeCharacters(BufferingXmlWriter.java:543) 
> 
>    at 
> com.ctc.wstx.sw.BaseStreamWriter.writeCharacters(BaseStreamWriter.java:509)
>    at 
> org.apache.axiom.om.impl.MTOMXMLStreamWriter.writeCharacters(MTOMXMLStreamWriter.java:237)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMTextImpl.writeOutput(OMTextImpl.java:255)
>    at 
> org.apache.axiom.om.impl.llom.OMTextImpl.internalSerializeLocal(OMTextImpl.java:414)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMTextImpl.internalSerialize(OMTextImpl.java:243) 
> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:905)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:889)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:905)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:889)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:905)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:889)

> 
>    at 
> org.apache.axiom.soap.impl.llom.SOAPEnvelopeImpl.internalSerialize(SOAPEnvelopeImpl.java:213)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:889)

> 
>    at 
> org.apache.axiom.om.impl.llom.OMNodeImpl.serialize(OMNodeImpl.java:450)
>    at 
> org.apache.axis2.transport.http.SOAPMessageFormatter.writeTo(SOAPMessageFormatter.java:77)

> 
>    at 
> org.apache.synapse.transport.nhttp.Axis2HttpRequest.streamMessageContents(Axis2HttpRequest.java:214)

> 
> 
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