Bastien created AXIS2-5773:
------------------------------
Summary: NullPointerException in AxisServlet when no
RequestResponseTransport
Key: AXIS2-5773
URL: https://issues.apache.org/jira/browse/AXIS2-5773
Project: Axis2
Issue Type: Bug
Components: transports
Affects Versions: 1.6.4
Environment: Tomcat 7.0.56, Debian 8.3, Java 1.7.0_95, Apache 2.4.10
w/ ajp
Reporter: Bastien
Not sure how to describe this as it may be a configuration issue on my end, but
I'm facing an error on Axis2 1.6.4 in the AxisServlet class, line 165 with a
NullPointerException when the code checks for the presence of a
RequestResponseTransport in the current MessageContext.
It occurs at the end of the service call being processed, when checking if the
response has been written. By looking at the source file I suppose this is
because the RequestResponseTransport.TRANSPORT_CONTROL has not been set. This
seems to be confirmed by the presence of the following DEBUG level logs:
DEBUG org.apache.axis2.transport.TransportUtils - Did not find
RequestResponseTransport cannot set response written
DEBUG org.apache.axis2.transport.TransportUtils - Did not find
RequestResponseTransport returning false from getResponseWritten()
The complete stacktrace is as follows:
ERROR org.apache.axis2.transport.http.AxisServlet -
java.lang.NullPointerException
at
org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:165)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:190)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
One interesting thing is that it does not prevent my service (POJO based) from
returning its response back to the client. However I do have a stacktrace at
the container level when this occurs:
GRAVE: Servlet.service() for servlet [AxisServlet] in context with path
[/server] threw exception [org.apache.axis2.AxisFault: No transport info in
MessageContext] with root cause
org.apache.axis2.AxisFault: No transport info in MessageContext
at
org.apache.axis2.transport.http.CommonsHTTPTransportSender.sendUsingOutputStream(CommonsHTTPTransportSender.java:270)
at
org.apache.axis2.transport.http.CommonsHTTPTransportSender.invoke(CommonsHTTPTransportSender.java:233)
at org.apache.axis2.engine.AxisEngine.sendFault(AxisEngine.java:526)
at
org.apache.axis2.transport.http.AxisServlet.handleFault(AxisServlet.java:433)
at
org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:216)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:190)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
For what it's worth, I think that replacing the test on line 165 to check for
null should be enough as the following:
if (!TransportUtils.isResponseWritten(msgContext)
&& msgContext.getProperty(RequestResponseTransport.TRANSPORT_CONTROL)
!= null
&& (((RequestResponseTransport)
msgContext.getProperty(
RequestResponseTransport.TRANSPORT_CONTROL)).
getStatus() != RequestResponseTransport.
RequestResponseTransportStatus.SIGNALLED)) {
But I have no idea if this would trigger any side effect.
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