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Date: Mon, 29 Nov 2010 07:05:41 -0500 (EST)
From: "Chris Emerson (JIRA)" <jira@apache.org>
To: java-dev@axis.apache.org
Subject: [jira] Commented: (AXIS2-4898) Thread named
 [MultiThreadedHttpConnectionManager cleanup] not cleaned up properly
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    [ https://issues.apache.org/jira/browse/AXIS2-4898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12964714#action_12964714 ] 

Chris Emerson commented on AXIS2-4898:
--------------------------------------

Hi Andreas,

I'm not sure how I can do what you're looking for.  The problem does not
appear until I make a call to the client stub.

For instance ...

EmployeeServiceSMARTStub.GetPerson req = new
EmployeeServiceSMARTStub.GetPerson();
req.setPassword(password);
req.setUsername(username);
EmployeeServiceSMARTStub.GetPersonResponse res =
employeeStub.getPerson(req);

personStructs = res.get_return();

If I comment out the GetPersonResponse line, the
MultiThreadedHttpConnectionManager is never started.

I'm trying to think of a good way to get you a testcase.


> Thread named [MultiThreadedHttpConnectionManager cleanup] not cleaned up properly
> ---------------------------------------------------------------------------------
>
>                 Key: AXIS2-4898
>                 URL: https://issues.apache.org/jira/browse/AXIS2-4898
>             Project: Axis2
>          Issue Type: Bug
>          Components: client-api
>    Affects Versions: 1.5.1
>         Environment: Operating system Windows and Linux
> Application Server: Tomcat 6.0.29
> Axis2 version 1.5.1
> Client created with ADB
>            Reporter: Chris Emerson
>            Priority: Critical
>
> Shutting down Tomcat 6.0.29 gives the following error:
> Nov 23, 2010 4:42:18 PM org.apache.catalina.loader.WebappClassLoader clearReferencesThreads
> SEVERE: A web application appears to have started a thread named [MultiThreadedHttpConnectionManager cleanup] but has failed to stop it. This is very likely to create a memory leak.
> This error only happens when one of our Axis2 web services is called through a generated ADB client stub.  It appears to never close this thread.
> Our current configuration on the web application:
>    /**
>     * The configureServiceStub method sets the web service client settings and
>     *  for the web service call. 
>     * 
>     * @param params WebServiceParameters
>     * 
>     * @throws Exception
>     */
>    private void configureServiceStub(WebServiceParameters params) throws Exception
>    {
>       // check if connection manager already established
>       if(connectionManager == null)
>       {
>          connectionManager = new MultiThreadedHttpConnectionManager();
>          connectionManagerParams = new HttpConnectionManagerParams();
>          connectionManagerParams.setDefaultMaxConnectionsPerHost(2);
>          connectionManagerParams.setTcpNoDelay(true);
>          connectionManagerParams.setStaleCheckingEnabled(true);
>          connectionManagerParams.setLinger(0);
>          connectionManager.setParams(connectionManagerParams);
>          httpClient = new HttpClient(connectionManager);
>          
>          configcontext = ConfigurationContextFactory.createDefaultConfigurationContext();
>          configcontext.setThreadPool(new ThreadPool(1, 3));
>          configcontext.setProperty(HTTPConstants.REUSE_HTTP_CLIENT,
>                                    Boolean.TRUE);
>          configcontext.setProperty(HTTPConstants.CACHED_HTTP_CLIENT, httpClient);
>          configcontext.setProperty(HTTPConstants.AUTO_RELEASE_CONNECTION, httpClient);
>       }           
>       
>       if(employeeStub == null)
>       {
>          employeeStub = new EmployeeServiceSMARTStub(configcontext,
>                                                      params.getLocalServiceUrl()
>                                                      + "EmployeeServiceSMART.EmployeeServiceSMARTHttpSoap12Endpoint/");
>          
>          employeeStub._getServiceClient().getOptions().setTimeOutInMilliSeconds(2 * 60 * 1000);
>          employeeStub._getServiceClient().getOptions().setProperty(HTTPConstants.SO_TIMEOUT,
>                                                            30000);
>          employeeStub._getServiceClient().getOptions().setProperty(HTTPConstants.CONNECTION_TIMEOUT,
>                                                            30000);
>          employeeStub._getServiceClient().getOptions().setProperty(HTTPConstants.REUSE_HTTP_CLIENT,
>                                                            Boolean.TRUE);
>          employeeStub._getServiceClient().getOptions().setProperty(HTTPConstants.AUTO_RELEASE_CONNECTION,
>                                                            Boolean.TRUE);
>          employeeStub._getServiceClient().getOptions().setProperty(HTTPConstants.CHUNKED,
>                                                            Boolean.TRUE);
>          employeeStub._getServiceClient().getOptions().setCallTransportCleanup(true);
>          employeeStub._getServiceClient().getOptions().setProperty(HTTPConstants.HTTP_PROTOCOL_VERSION,
>                                  HTTPConstants.HEADER_PROTOCOL_10);
>       }
>    }
> After each call we call the following code:
>       finally
>       {
>          // clean up all hanging threads and stop connection manager        
>          if(employeeStub._getServiceClient() != null)
>          {
>             try
>             {
>                employeeStub._getServiceClient().cleanupTransport();
>             }
>             catch(Exception e)
>             {
>                e.printStackTrace();
>             }
>             try
>             {
>                employeeStub._getServiceClient().cleanup();
>                employeeStub.cleanup();
>             }
>             catch(Exception e)
>             {
>                e.printStackTrace();
>             }
>          }
>          
>          connectionManager.closeIdleConnections(0);
>          connectionManager.shutdown();
>          connectionManager = null;
>          employeeStub = null;
>       }

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