The local transport proxy is experiencing intermittent timeouts when calling the soap message.

[veneerac]

Description

Getting fails and experiencing intermittent timeouts when calling JSON response from a local transport proxy.
When the first proxy sends a soap message and the second proxy tries to respond with a JSON message occurs the Caused by: javax.xml.stream.XMLStreamException: Can not output XML declaration, after other output has already been done.

Steps to Reproduce

1. Create a local Proxy
2. In the local proxy create a json with a payload factory (json)
3. set the messageType to application/json
4. invoke the local proxy from another Proxy or an API

Affected Component

Analytics

Version

wso2ei-6.5.0

Environment Details (with versions)

No response

Relevant Log Output

ERROR {org.apache.axis2.transport.local.LocalResponder} -  Error sending response
org.apache.axis2.AxisFault: Can not output XML declaration, after other output has already been done.
	at org.apache.axis2.AxisFault.makeFault(AxisFault.java:430)
	at org.apache.axis2.transport.TransportUtils.writeMessage(TransportUtils.java:311)
	at org.apache.axis2.transport.local.LocalResponder.getEnvelope(LocalResponder.java:228)
	at org.apache.axis2.transport.local.LocalResponder.handleResponse(LocalResponder.java:172)
	at org.apache.axis2.transport.local.LocalResponder.invoke(LocalResponder.java:112)
	at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:442)
	at org.apache.synapse.core.axis2.Axis2Sender.sendBack(Axis2Sender.java:220)
	at org.apache.synapse.mediators.builtin.RespondMediator.mediate(RespondMediator.java:45)
	at org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:109)
	at org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:242)
	at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.mediateFromContinuationStateStack(Axis2SynapseEnvironment.java:802)
	at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:303)
	at org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:608)
	at org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:205)
	at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180)
	at org.apache.synapse.transport.passthru.ClientWorker.run(ClientWorker.java:265)
	at org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:750)
Caused by: javax.xml.stream.XMLStreamException: Can not output XML declaration, after other output has already been done.
	at com.ctc.wstx.sw.BaseStreamWriter.throwOutputError(BaseStreamWriter.java:1522)
	at com.ctc.wstx.sw.BaseStreamWriter.reportNwfStructure(BaseStreamWriter.java:1551)
	at com.ctc.wstx.sw.BaseStreamWriter.doWriteStartDocument(BaseStreamWriter.java:650)
	at com.ctc.wstx.sw.BaseStreamWriter.writeStartDocument(BaseStreamWriter.java:638)
	at com.ctc.wstx.sw.BaseStreamWriter.writeStartDocument(BaseStreamWriter.java:626)
	at org.apache.axiom.om.impl.MTOMXMLStreamWriter.writeStartDocument(MTOMXMLStreamWriter.java:277)
	at org.apache.synapse.commons.json.JsonDataSource.serialize(JsonDataSource.java:88)
	at org.apache.axiom.om.impl.llom.OMSourcedElementImpl.internalSerialize(OMSourcedElementImpl.java:694)
	at org.apache.axiom.om.impl.util.OMSerializerUtil.serializeChildren(OMSerializerUtil.java:562)
	at org.apache.axiom.om.impl.llom.OMElementImpl.internalSerialize(OMElementImpl.java:879)
	at org.apache.axiom.soap.impl.llom.SOAPEnvelopeImpl.serializeInternally(SOAPEnvelopeImpl.java:283)
	at org.apache.axiom.soap.impl.llom.SOAPEnvelopeImpl.internalSerialize(SOAPEnvelopeImpl.java:245)
	at org.apache.axiom.om.impl.llom.OMSerializableImpl.serializeAndConsume(OMSerializableImpl.java:193)
	at org.apache.axis2.transport.TransportUtils.writeMessage(TransportUtils.java:308)
	... 18 more
[2023-01-18 13:06:06,115] [-1] [] [Timer-6]  WARN {org.apache.synapse.core.axis2.TimeoutHandler} -  Expiring message ID : urn:uuid:aabcaed2-82c5-42d0-a7b3-ace604302da5; dropping message after ENDPOINT_TIMEOUT of : 30 seconds for Endpoint [ep1], URI : local://services/price-compare_getRejectCodesCache_v1.0, Received through Proxy service : RespondMediatorProxy

Related Issues

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Suggested Labels

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