I believe that the issue may be caused by the following line: context.setProperty(HTTPConstants.AUTO_RELEASE_CONNECTION, Constants.VALUE_TRUE);
Note that Amila's blog doesn't recommend this at all. I believe that using this property is fundamentally incorrect because it implies that the HTTP transport will release the connection before the Axis2 kernel gets a chance to process the response. Amila seems to agree on this point; see [1]. Andreas [1] http://markmail.org/thread/hucxz5jckgynyagw On Tue, Sep 28, 2010 at 11:03, Philippe Frangioni <[email protected]> wrote: > Hi all, > > I'm using Axis2 1.5.1 to expose a Spring bean as a web service. Everything > works pretty fine. > > The client side is configured as described in: > http://amilachinthaka.blogspot.com/2009/05/improving-axis2-client-http-transport.html > and: > http://amilachinthaka.blogspot.com/2010/01/improving-axis2-http-transport-client.html > > But once in a while, the client gets this exception: > > java.lang.NullPointerException > at > org.apache.axis2.client.ServiceClient.cleanupTransport(ServiceClient.java:824) > at > org.apache.axis2.client.ServiceClient.createClient(ServiceClient.java:650) > at > org.apache.axis2.client.ServiceClient.sendReceive(ServiceClient.java:538) > at > org.apache.axis2.client.ServiceClient.sendReceive(ServiceClient.java:521) > at > org.apache.axis2.rpc.client.RPCServiceClient.invokeBlocking(RPCServiceClient.java:102) > at > com.linxo.services.jobs.impl.JobExplorerProxyImpl.updateJob(JobExplorerProxyImpl.java:210) > at > com.linxo.services.jobs.impl.JobExecutorServiceImpl.updateJob(JobExecutorServiceImpl.java:196) > at > com.linxo.services.sync.impl.AbstractSynchronizationJobProcessor.operationUpdate(AbstractSynchronizationJobProcessor.java:46) > at > com.linxo.sync.provider.AbstractProviderEngine.fireOperationUpdate(AbstractProviderEngine.java:35) > at > com.linxo.provider.caissedepargne.CEProviderEngine.navigateToHistory(CEProviderEngine.java:89) > at > com.linxo.provider.caissedepargne.CEProviderEngine.getTransactions(CEProviderEngine.java:110) > at > com.linxo.services.sync.impl.SynchronizeNowJobProcessor.process(SynchronizeNowJobProcessor.java:136) > at sun.reflect.GeneratedMethodAccessor128.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.lang.reflect.Method.invoke(Method.java:616) > at > org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307) > at > org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) > at > org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) > at > org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:107) > at > org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) > at > org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) > at $Proxy40.process(Unknown Source) > at > com.linxo.services.jobs.impl.JobProcessorWrapperRunnable.invokeJobProcessor(JobProcessorWrapperRunnable.java:87) > at > com.linxo.services.jobs.impl.JobProcessorWrapperRunnable.run(JobProcessorWrapperRunnable.java:32) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) > at java.lang.Thread.run(Thread.java:636) > > This doesn't impact the following web service calls. > > This exception occurs at the same place than one of the exceptions noted in: > https://issues.apache.org/jira/browse/AXIS2-4648 > but the rest of the stack trace is different. > > Do you think it could be related? > Did someone else get this exception? > Any idea of what's going on? > > Here is my client code: > > Initialization: > ------------------ > try { > httpConnectionManager = new MultiThreadedHttpConnectionManager(); > HttpConnectionManagerParams params = new > HttpConnectionManagerParams(); > > params.setDefaultMaxConnectionsPerHost(configuration.getMaxConnectionsPerHost()); > httpConnectionManager.setParams(params); > > final HttpClient httpClient = new HttpClient(httpConnectionManager); > rpcServiceClient = new RPCServiceClient(); > final Options options = rpcServiceClient.getOptions(); > final ConfigurationContext context = > rpcServiceClient.getServiceContext().getConfigurationContext(); > context.setProperty(HTTPConstants.REUSE_HTTP_CLIENT, > Constants.VALUE_TRUE); > context.setProperty(HTTPConstants.CACHED_HTTP_CLIENT, httpClient); > context.setProperty(HTTPConstants.AUTO_RELEASE_CONNECTION, > Constants.VALUE_TRUE); > final EndpointReference targetEPR > = new > EndpointReference(configuration.getWebServiceEndPointAddress()); > options.setTo(targetEPR); > options.setCallTransportCleanup(true); > } catch (AxisFault af) { > logger.fatal("AxisFault while starting up web service client", af); > } > > At each call: > --------------------- > try { > final QName opMethodName = new > QName(configuration.getWebServiceNamespace(), > "methodName"); > final Object[] args = new Object[0]; > final Class[] returnTypes = new Class[]{ Long.class }; > > final Object[] response = > rpcServiceClient.invokeBlocking(opMethodName, args, > > returnTypes); > return (Long) response[0]; > } catch (AxisFault af) { > logger.error("AxisFault while calling methodName", af); > throw buildException(af); > } > finally { > cleanupTransport(); > } > > where cleanupTransport() is: > ------------------------------------------- > > private void cleanupTransport() throws MyException > { > try { > rpcServiceClient.cleanupTransport(); > } > catch(AxisFault af) { > logger.error("AxisFault while cleaning up the transport", af); > throw buildException(af); > } > } > > and buildException() returns a MyException. > > > > Thanks for your help, > Phil > --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
