Hi, I have a scenario on the ESB where I have created two APIs with the same context in the tenant space. The first API doesn't have a version and the second API has a version. The first API receives the request and forwards to the second API. See illustration below.
Client (/twitter) --> Twitter_API (/twitter/1.0.0) --> Twitter_API_v1.0.0 This scenario however causes the following [1] NPE on the first request that's sent to the server. The subsequent requests pass until a server restart happens. I tried logging into the management console of the ESB using tenant credentials to check whether it was related to tenant loading. The first request still failed with the same error. Any idea why this is happening? This issue first occurred to me in API Manager after migrating to the latest released version of Synapse. And is causing test failures in the product. It worked fine in the older versions of Synapse (2.1.2- version range). [1] [2015-10-01 04:41:39,519] ERROR - PassThroughHttpSender Failed to submit the response 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) at org.apache.axis2.engine.AxisEngine.send(AxisEngine.java:442) at org.wso2.carbon.core.multitenancy.transports.TenantTransportSender.invoke(TenantTransportSender.java:231) 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.rest.Resource.process(Resource.java:297) at org.apache.synapse.rest.API.process(API.java:335) at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:97) at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:52) at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:266) 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.wso2.carbon.core.multitenancy.MultitenantMessageReceiver.processResponse(MultitenantMessageReceiver.java:166) at org.wso2.carbon.core.multitenancy.MultitenantMessageReceiver.receive(MultitenantMessageReceiver.java:82) 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) [2015-10-01 04:41:39,521] ERROR - Axis2Sender Access-Control-Allow-Credentials:true,Access-Control-Allow-Methods:GET, POST,Access-Control-Allow-Origin:*,Content-Type:application/json; charset=utf-8,X-Source:redis,<?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.wso2.carbon.core.multitenancy.transports.TenantTransportSender.invoke(TenantTransportSender.java:231) 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.rest.Resource.process(Resource.java:297) at org.apache.synapse.rest.API.process(API.java:335) at org.apache.synapse.rest.RESTRequestHandler.dispatchToAPI(RESTRequestHandler.java:97) at org.apache.synapse.rest.RESTRequestHandler.process(RESTRequestHandler.java:52) at org.apache.synapse.core.axis2.Axis2SynapseEnvironment.injectMessage(Axis2SynapseEnvironment.java:266) 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.wso2.carbon.core.multitenancy.MultitenantMessageReceiver.processResponse(MultitenantMessageReceiver.java:166) at org.wso2.carbon.core.multitenancy.MultitenantMessageReceiver.receive(MultitenantMessageReceiver.java:82) 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) ... 25 more Thanks, NuwanD. -- Nuwan Dias Technical Lead - WSO2, Inc. http://wso2.com email : nuw...@wso2.com Phone : +94 777 775 729
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