[AXIS2-3876] first SSL POST request to AxisServlet with transportsession scope leads to NPE in DispatchPhase.fillContextsFromSessionContext

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 1.4, 1.4.1, 1.5
• Fix Version/s: 1.6.0
• Component/s: transports
• Environment: WLS8.1, AIX
• Assignee: Unassigned
• Reporter: Matthias Weber
• Created: 27/Jun/08 14:22
• Updated: 18/Aug/09 21:20
• Resolved: 18/Aug/09 21:20

Description

We use Axis 1.4 in an WLS 8.1 environment. There are no TransportReceivers registered in axis2.xml.

After server start or redeploy it is impossible to get an answer to a POST request via SSL. We see following exception:

@|27.06.2008 11:01:53|ERROR|org.apache.axis2.transport.http.AxisServlet|
java.lang.NullPointerException
at org.apache.axis2.engine.DispatchPhase.fillContextsFromSessionContext(DispatchPhase.java:229)
at org.apache.axis2.engine.DispatchPhase.loadContexts(DispatchPhase.java:158)
at org.apache.axis2.engine.DispatchPhase.checkPostConditions(DispatchPhase.java:97)
at org.apache.axis2.engine.Phase.invoke(Phase.java:333)
at org.apache.axis2.engine.AxisEngine.invoke(AxisEngine.java:264)
at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:163)
at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)
at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:131)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:854)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(ServletStubImpl.java:1077)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:465)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:349)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:7047)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3902)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2773)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:224)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:183)

After the first sent GET there is no problem anymore.

The NPE is thrown here:

TransportListener listener = msgContext.getTransportIn().getReceiver();

Seems that msgContext.getTransportIn() returns null.

Maybe this is because AxisServlet only resisters itself as TransportListener for HTTP scheme. From AxisServlet.init(ServletConfig config):

TransportInDescription transportInDescription = new TransportInDescription(Constants.TRANSPORT_HTTP);
transportInDescription.setReceiver(this);
listenerManager.addListener(transportInDescription, true);

Would it be possible to register AxisServlet here also for HTTPS?

A GET request never fails because doGet() does an agent.initTransportListener(request); but doPost() never does.

I know, there was already an Jira issue AXIS2-3141 which addresses the same thing. But the attached patch seems to be only a workaround.

Issue Links

• relates to: AXIS2-4465 TransportInDescription and TransportListener instances for AxisServlet are not managed properly