Return empty response in REST API in WSO2 ESB -

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i have api artifact in wso2 esb 4.9.0 offering simple put rest service.

the put service simplified here log of incoming request , should respond http code 200 without content.

this api resource: 

<api xmlns="http://ws.apache.org/ns/synapse" name="myapi" context="/context">     <resource methods="put" uri-template="/resource">         <insequence>             <log level="custom">                 <property name="put" value="/v1/updateworkflowdata" />             </log>             <property name="no_entity_body" value="true" scope="axis2" />             <property name="http_sc" value="200" scope="axis2" />             <respond />         </insequence>     </resource> </api>

with property "no_entity_body" true (which being used in requests) following exception:

    [2016-06-28 12:27:27,524] error - passthroughhttpsslsender failed submit response java.lang.classcastexception: java.lang.string cannot cast java.lang.boolean         @ org.apache.synapse.transport.passthru.passthroughhttpsender.submitresponse(passthroughhttpsender.java:468)         @ org.apache.synapse.transport.passthru.passthroughhttpsender.invoke(passthroughhttpsender.java:267)         @ org.apache.axis2.engine.axisengine.send(axisengine.java:442)         @ org.apache.synapse.core.axis2.axis2sender.sendback(axis2sender.java:212)         @ org.apache.synapse.mediators.builtin.respondmediator.mediate(respondmediator.java:28)         @ org.apache.synapse.mediators.abstractlistmediator.mediate(abstractlistmediator.java:81)         @ org.apache.synapse.mediators.abstractlistmediator.mediate(abstractlistmediator.java:48)         @ org.apache.synapse.mediators.base.sequencemediator.mediate(sequencemediator.java:149)         @ org.apache.synapse.rest.resource.process(resource.java:297)         @ org.apache.synapse.rest.api.process(api.java:378)         @ org.apache.synapse.rest.restrequesthandler.dispatchtoapi(restrequesthandler.java:97)         @ org.apache.synapse.rest.restrequesthandler.process(restrequesthandler.java:65)         @ org.apache.synapse.core.axis2.axis2synapseenvironment.injectmessage(axis2synapseenvironment.java:266)         @ org.apache.synapse.core.axis2.synapsemessagereceiver.receive(synapsemessagereceiver.java:83)         @ org.apache.axis2.engine.axisengine.receive(axisengine.java:180)         @ org.apache.synapse.transport.passthru.serverworker.processnonentityenclosingresthandler(serverworker.java:317)         @ org.apache.synapse.transport.passthru.serverworker.processentityenclosingrequest(serverworker.java:363)         @ org.apache.synapse.transport.passthru.serverworker.run(serverworker.java:142)         @ org.apache.axis2.transport.base.threads.nativeworkerpool$1.run(nativeworkerpool.java:172)         @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1145)         @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:615)         @ java.lang.thread.run(thread.java:745) [2016-06-28 12:27:27,555] error - axis2sender accept-encoding:gzip,deflate,content-type:application/json,host:localhost:8243,<?xml version='1.0' encoding='utf-8'?><soapenv:envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"><soapenv:body/></soapenv:envelope> unexpected error sending message org.apache.axis2.axisfault: failed submit response         @ org.apache.synapse.transport.passthru.passthroughhttpsender.handleexception(passthroughhttpsender.java:610)         @ org.apache.synapse.transport.passthru.passthroughhttpsender.invoke(passthroughhttpsender.java:269)         @ org.apache.axis2.engine.axisengine.send(axisengine.java:442)         @ org.apache.synapse.core.axis2.axis2sender.sendback(axis2sender.java:212)         @ org.apache.synapse.mediators.builtin.respondmediator.mediate(respondmediator.java:28)         @ org.apache.synapse.mediators.abstractlistmediator.mediate(abstractlistmediator.java:81)         @ org.apache.synapse.mediators.abstractlistmediator.mediate(abstractlistmediator.java:48)         @ org.apache.synapse.mediators.base.sequencemediator.mediate(sequencemediator.java:149)         @ org.apache.synapse.rest.resource.process(resource.java:297)         @ org.apache.synapse.rest.api.process(api.java:378)         @ org.apache.synapse.rest.restrequesthandler.dispatchtoapi(restrequesthandler.java:97)         @ org.apache.synapse.rest.restrequesthandler.process(restrequesthandler.java:65)         @ org.apache.synapse.core.axis2.axis2synapseenvironment.injectmessage(axis2synapseenvironment.java:266)         @ org.apache.synapse.core.axis2.synapsemessagereceiver.receive(synapsemessagereceiver.java:83)         @ org.apache.axis2.engine.axisengine.receive(axisengine.java:180)         @ org.apache.synapse.transport.passthru.serverworker.processnonentityenclosingresthandler(serverworker.java:317)         @ org.apache.synapse.transport.passthru.serverworker.processentityenclosingrequest(serverworker.java:363)         @ org.apache.synapse.transport.passthru.serverworker.run(serverworker.java:142)         @ org.apache.axis2.transport.base.threads.nativeworkerpool$1.run(nativeworkerpool.java:172)         @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1145)         @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:615)         @ java.lang.thread.run(thread.java:745) caused by: java.lang.classcastexception: java.lang.string cannot cast java.lang.boolean         @ org.apache.synapse.transport.passthru.passthroughhttpsender.submitresponse(passthroughhttpsender.java:468)         @ org.apache.synapse.transport.passthru.passthroughhttpsender.invoke(passthroughhttpsender.java:267)         ... 20 more

my question now:

  1. general: how set response empty when request contain content?
  2. is solution "no_entity_body" wrong , not work?

1) can use script mediator replace response body empty string. there other ways too. script mediator option.

2) "no_entity_body" used specify expect response request not have body. example request.


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