Hi Ajith, I have already added a fix to the NPE and currently testing that. Just wanted to let you know that this is happening due to a configuration issue. The code was written assuming that this NPE cannot occur in proper configurations. But there can be some edge cases where this can become null. I am currently investigating on those.
On Tue, Oct 6, 2015 at 6:52 PM, Ajith Vitharana <aji...@wso2.com> wrote: > > > On Tue, Oct 6, 2015 at 5:06 AM, Chanaka Fernando <chana...@wso2.com> > wrote: > >> Hi Ajith, >> >> The scenario which you have tested is not correct. If you put <send/> >> mediator in the outSequence, since you are cloning the request and send to >> 2 back ends, ESB will get 2 responses and tries to send back 2 responses to >> client and that is causing this exception. What happens is that ESB will >> send back the first response and then release the connection. When it tries >> to send back the 2nd response, If some other thread has already reused that >> connection, the "request" will be null and that is causing the NPE. >> >> If you are putting a <send/> mediator in the outSequence, make sure you >> aggregate the responses before sending the response back. >> > > Yes. I understood the logic. But my concerns was returning NPE. > > -Ajith > >> >> On Mon, Oct 5, 2015 at 9:23 PM, Ajith Vitharana <aji...@wso2.com> wrote: >> >>> >>> >>> On Mon, Oct 5, 2015 at 5:59 AM, Chanaka Fernando <chana...@wso2.com> >>> wrote: >>> >>>> Hi Ajith, >>>> >>>> We have already identified this issue and currently working on a fix. >>>> Thanks for reporting this issue. >>>> >>> >>> Thanks for looking to this. >>> >>> -Ajith >>> >>>> >>>> On Mon, Oct 5, 2015 at 12:56 AM, Ajith Vitharana <aji...@wso2.com> >>>> wrote: >>>> >>>>> Hi All >>>>> >>>>> I did a slight change to sample [1] (used <send/> instead of <drop/> >>>>> at the outSequence) , now I'm getting following exception. >>>>> >>>>> [1] >>>>> https://docs.wso2.com/display/IntegrationPatterns/Durable+Subscriber >>>>> >>>>> >>>>> >>>>> [2015-10-04 15:19:30,891] DEBUG - wire << "[\r][\n]" >>>>> [2015-10-04 15:19:30,892] ERROR - PassThroughHttpSender Failed to >>>>> submit the response >>>>> j*ava.lang.NullPointerException* >>>>> * at >>>>> org.apache.synapse.transport.passthru.util.SourceResponseFactory.create(SourceResponseFactory.java:64)* >>>>> * at >>>>> org.apache.synapse.transport.passthru.PassThroughHttpSender.submitResponse(PassThroughHttpSender.java:462)* >>>>> * at >>>>> org.apache.synapse.transport.passthru.PassThroughHttpSender.invoke(PassThroughHttpSender.java:267)* >>>>> * at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:442)* >>>>> at >>>>> org.apache.synapse.core.axis2.Axis2Sender.sendBack(Axis2Sender.java:212) >>>>> at >>>>> org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:444) >>>>> at >>>>> org.apache.synapse.mediators.builtin.SendMediator.mediate(SendMediator.java:102) >>>>> at >>>>> org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:81) >>>>> at >>>>> org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:48) >>>>> at >>>>> org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:149) >>>>> at >>>>> org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:297) >>>>> at >>>>> org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:529) >>>>> at >>>>> org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:172) >>>>> at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180) >>>>> at >>>>> org.apache.synapse.transport.passthru.ClientWorker.run(ClientWorker.java:247) >>>>> at >>>>> org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172) >>>>> at >>>>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) >>>>> at >>>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) >>>>> at java.lang.Thread.run(Thread.java:745) >>>>> [2015-10-04 15:19:30,894] ERROR - Axis2Sender >>>>> Content-Type:application/soap+xml; charset=UTF-8; >>>>> action="urn:getQuoteResponse",<?xml version='1.0' >>>>> encoding='utf-8'?><soapenv:Envelope xmlns:soapenv=" >>>>> http://www.w3.org/2003/05/soap-envelope";><soapenv:Body/></soapenv:Envelope> >>>>> Unexpected error sending message back >>>>> org.apache.axis2.AxisFault: Failed to submit the response >>>>> at >>>>> org.apache.synapse.transport.passthru.PassThroughHttpSender.handleException(PassThroughHttpSender.java:610) >>>>> at >>>>> org.apache.synapse.transport.passthru.PassThroughHttpSender.invoke(PassThroughHttpSender.java:269) >>>>> at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:442) >>>>> at >>>>> org.apache.synapse.core.axis2.Axis2Sender.sendBack(Axis2Sender.java:212) >>>>> at >>>>> org.apache.synapse.core.axis2.Axis2SynapseEnvironment.send(Axis2SynapseEnvironment.java:444) >>>>> at >>>>> org.apache.synapse.mediators.builtin.SendMediator.mediate(SendMediator.java:102) >>>>> at >>>>> org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:81) >>>>> at >>>>> org.apache.synapse.mediators.AbstractListMediator.mediate(AbstractListMediator.java:48) >>>>> at >>>>> org.apache.synapse.mediators.base.SequenceMediator.mediate(SequenceMediator.java:149) >>>>> at >>>>> org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:297) >>>>> at >>>>> org.apache.synapse.core.axis2.SynapseCallbackReceiver.handleMessage(SynapseCallbackReceiver.java:529) >>>>> at >>>>> org.apache.synapse.core.axis2.SynapseCallbackReceiver.receive(SynapseCallbackReceiver.java:172) >>>>> at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:180) >>>>> at >>>>> org.apache.synapse.transport.passthru.ClientWorker.run(ClientWorker.java:247) >>>>> at >>>>> org.apache.axis2.transport.base.threads.NativeWorkerPool$1.run(NativeWorkerPool.java:172) >>>>> at >>>>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) >>>>> at >>>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) >>>>> at java.lang.Thread.run(Thread.java:745) >>>>> *Caused by: java.lang.NullPointerException* >>>>> * at >>>>> org.apache.synapse.transport.passthru.util.SourceResponseFactory.create(SourceResponseFactory.java:64)* >>>>> * at >>>>> org.apache.synapse.transport.passthru.PassThroughHttpSender.submitResponse(PassThroughHttpSender.java:462)* >>>>> * at >>>>> org.apache.synapse.transport.passthru.PassThroughHttpSender.invoke(PassThroughHttpSender.java:267)* >>>>> * ... 16 more* >>>>> [2015-10-04 15:19:30,898] INFO - LogMediator To: >>>>> http://www.w3.org/2005/08/addressing/anonymous, WSAction: , >>>>> SOAPAction: , MessageID: urn:uuid:4acfe16a-ee7d-4ab6-b35b-f0e3946160c9, >>>>> Direction: response, MESSAGE = Executing default "fault" sequence, >>>>> ERROR_CODE = 0, ERROR_MESSAGE = Content-Type:application/soap+xml; >>>>> charset=UTF-8; action="urn:getQuoteResponse",<?xml version='1.0' >>>>> encoding='utf-8'?><soapenv:Envelope xmlns:soapenv=" >>>>> http://www.w3.org/2003/05/soap-envelope";><soapenv:Body/></soapenv:Envelope> >>>>> Unexpected error sending message back, Envelope: <?xml version='1.0' >>>>> encoding='utf-8'?><soapenv:Envelope xmlns:soapenv=" >>>>> http://www.w3.org/2003/05/soap-envelope";><soapenv:Body><ns:getQuoteResponse >>>>> xmlns:ns="http://services.samples";><ns:return xmlns:ax21=" >>>>> http://services.samples/xsd"; xmlns:xsi=" >>>>> http://www.w3.org/2001/XMLSchema-instance"; >>>>> xsi:type="ax21:GetQuoteResponse"><ax21:change>-2.3202266677546106</ax21:change><ax21:earnings>12.650295806384626</ax21:earnings><ax21:high>-152.04270426044403</ax21:high><ax21:last>154.1916889021466</ax21:last><ax21:lastTradeTimestamp>Sun >>>>> Oct 04 15:19:30 EDT >>>>> 2015</ax21:lastTradeTimestamp><ax21:low>158.83675994993015</ax21:low><ax21:marketCap>4.917881726394041E7</ax21:marketCap><ax21:name>foo >>>>> Company</ax21:name><ax21:open>158.0551704762858</ax21:open><ax21:peRatio>-17.10342133824433</ax21:peRatio><ax21:percentageChange>1.6236826882815951</ax21:percentageChange><ax21:prevClose>-142.89902112648588</ax21:prevClose><ax21:symbol>foo</ax21:symbol><ax21:volume>15263</ax21:volume></ns:return></ns:getQuoteResponse></soapenv:Body></soapenv:Envelope> >>>>> [2015-10-04 15:21:30,364] WARN - SourceHandler Connection time out >>>>> after request is read: http-incoming-10 >>>>> >>>>> -Ajith >>>>> >>>>> -- >>>>> Ajith Vitharana. >>>>> >>>>> WSO2 Inc. - http://wso2.com >>>>> Email : aji...@wso2.com >>>>> Blog : http://vitharana.org >>>>> Mobile : +1-812-360-5335 >>>>> >>>>> >>>> >>>> >>>> -- >>>> -- >>>> Chanaka Fernando >>>> Senior Technical Lead >>>> WSO2, Inc.; http://wso2.com >>>> lean.enterprise.middleware >>>> >>>> mobile: +94 773337238 >>>> Blog : http://soatutorials.blogspot.com >>>> LinkedIn:http://www.linkedin.com/pub/chanaka-fernando/19/a20/5b0 >>>> Twitter:https://twitter.com/chanakaudaya >>>> >>>> >>>> >>>> >>>> >>> >>> >>> -- >>> Ajith Vitharana. >>> >>> WSO2 Inc. - http://wso2.com >>> Email : aji...@wso2.com >>> Blog : http://vitharana.org >>> Mobile : +1-812-360-5335 >>> >>> >> >> >> -- >> -- >> Chanaka Fernando >> Senior Technical Lead >> WSO2, Inc.; http://wso2.com >> lean.enterprise.middleware >> >> mobile: +94 773337238 >> Blog : http://soatutorials.blogspot.com >> LinkedIn:http://www.linkedin.com/pub/chanaka-fernando/19/a20/5b0 >> Twitter:https://twitter.com/chanakaudaya >> >> >> >> >> > > > -- > Ajith Vitharana. > > WSO2 Inc. - http://wso2.com > Email : aji...@wso2.com > Blog : http://vitharana.org > Mobile : +1-812-360-5335 > > -- -- Chanaka Fernando Senior Technical Lead WSO2, Inc.; http://wso2.com lean.enterprise.middleware mobile: +94 773337238 Blog : http://soatutorials.blogspot.com LinkedIn:http://www.linkedin.com/pub/chanaka-fernando/19/a20/5b0 Twitter:https://twitter.com/chanakaudaya
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