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From "Eddie O'Neil (JIRA)" <beehive-...@incubator.apache.org>
Subject [jira] Resolved: (BEEHIVE-834) JDBC Control throws NPE after deserialization
Date Tue, 28 Jun 2005 16:21:02 GMT
     [ http://issues.apache.org/jira/browse/BEEHIVE-834?page=all ]
     
Eddie O'Neil resolved BEEHIVE-834:
----------------------------------

    Resolution: Fixed

This was fixed in SVN 201658.

> JDBC Control throws NPE after deserialization
> ---------------------------------------------
>
>          Key: BEEHIVE-834
>          URL: http://issues.apache.org/jira/browse/BEEHIVE-834
>      Project: Beehive
>         Type: Bug
>   Components: System Controls
>     Versions: v1m1
>  Environment: Dist built from SVN 201574.  RHEL with Tomcat 5.0.28.
>     Reporter: Jeremiah Johnson
>     Assignee: Eddie O'Neil
>     Priority: Critical
>      Fix For: V1
>  Attachments: BEEHIVE-834.txt
>
> If I do a redeploy of a war that contains a JDBC Control that has been in use, then my
JDBC Controls throw an NPE when used after the redeploy completes.  I believe that the cause
of this is that the redeploy is causing the session (which contains the JDBC Control) to be
serialized.  There is a field in the JDBC Control called _resources that is transient so it
gets dropped.  After the redeploy / deserialization of the session, the _resources remains
null but is then used in onRelease().
> Repro:
> -  edit build.properties for derby.jar location
> -  edit src/org/apache/beehive/samples/petstore/controls/data/DBProperties.java for where
you want derby data
> -  ant deploy-beehive build war 
> -  cp petstoreWeb.war $CATALINA_HOME/webapps
> -  http://localhost:8080/petstoreWeb/
> -  Click initDB
> -  Click stopDB
> -  cp petstoreWeb.war $CATALINA_HOME/webapps
> -  Click initDB
> -  Getting an NPE here, but really should be okay.
> -  If you wait until the session times out, then you can move on and the NPE doesn?t
appear again until your next redeploy
> --- browser result from initDB with NPE
> type Exception report
> message 
> description The server encountered an internal error () that prevented it from fulfilling
this request.
> exception 
> javax.servlet.ServletException
>         org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.processInternal(PageFlowRequestProcessor.java:623)
>         org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.process(PageFlowRequestProcessor.java:886)
>         org.apache.beehive.netui.pageflow.AutoRegisterActionServlet.process(AutoRegisterActionServlet.java:600)
>         org.apache.beehive.netui.pageflow.PageFlowActionServlet.process(PageFlowActionServlet.java:163)
>         org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
>         javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>         javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> root cause 
> java.lang.NullPointerException
>         org.apache.beehive.controls.system.jdbc.JdbcControlImpl.onRelease(JdbcControlImpl.java:126)
>         org.apache.beehive.controls.system.jdbc.JdbcControlImplInitializer$_resourceContextResourceEventsEventAdaptor.onRelease(JdbcControlImplInitializer.java:24)
>         org.apache.beehive.controls.runtime.bean.ResourceContextImpl.release(ResourceContextImpl.java:144)
>         org.apache.beehive.controls.runtime.bean.ControlContainerContext.releaseResources(ControlContainerContext.java:136)
>         org.apache.beehive.controls.runtime.bean.ControlContainerContext.endContext(ControlContainerContext.java:64)
>         org.apache.beehive.controls.runtime.servlet.ServletBeanContext.endContext(ServletBeanContext.java:92)
>         org.apache.beehive.netui.pageflow.internal.JavaControlUtils.uninitializeControlContext(JavaControlUtils.java:85)
>         org.apache.beehive.netui.pageflow.PageFlowPageFilter.doFilter(PageFlowPageFilter.java:229)
>         org.apache.beehive.netui.pageflow.internal.DefaultForwardRedirectHandler.forward(DefaultForwardRedirectHandler.java:127)
>         org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.doForward(PageFlowRequestProcessor.java:1824)
>         org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.processForwardConfig(PageFlowRequestProcessor.java:1698)
>         org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
>         org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.processInternal(PageFlowRequestProcessor.java:600)
>         org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.process(PageFlowRequestProcessor.java:886)
>         org.apache.beehive.netui.pageflow.AutoRegisterActionServlet.process(AutoRegisterActionServlet.java:600)
>         org.apache.beehive.netui.pageflow.PageFlowActionServlet.process(PageFlowActionServlet.java:163)
>         org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
>         javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>         javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> note The full stack trace of the root cause is available in the Apache Tomcat/5.0.28
logs.
>  
> --- catalina.out content
> 24 Jun 2005 01:43:53,366 INFO  PageFlowRequestProcessor []: This exception was u
> nhandled by any exception handler.
> Throwable: org.apache.beehive.netui.pageflow.internal.UnhandledException
> Stack Trace:
> org.apache.beehive.netui.pageflow.internal.UnhandledException
>         at org.apache.beehive.netui.pageflow.internal.DefaultExceptionsHandler.handleException(DefaultExceptionsHandler.java:117)
>         at org.apache.beehive.netui.pageflow.FlowController.handleException(FlowController.java:259)
>         at org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.handleException(PageFlowRequestProcessor.java:680)
>         at org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.processInternal(PageFlowRequestProcessor.java:620)
>         at org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.process(PageFlowRequestProcessor.java:886)
>         at org.apache.beehive.netui.pageflow.AutoRegisterActionServlet.process(AutoRegisterActionServlet.java:600)
>         at org.apache.beehive.netui.pageflow.PageFlowActionServlet.process(PageFlowActionServlet.java:163)
>         at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
>         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
>         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
>         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
>         at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
>         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>         at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
>         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
>         at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
>         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
>         at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
>         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
>         at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
>         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>         at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
>         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
>         at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
>         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
>         at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
>         at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
>         at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
>         at java.lang.Thread.run(Thread.java:595)
> 24 Jun 2005 01:43:53,366 INFO  PageFlowRequestProcessor []: This exception was unhandled
by any exception handler.
> Throwable: org.apache.beehive.netui.pageflow.internal.UnhandledException
> Stack Trace:
> org.apache.beehive.netui.pageflow.internal.UnhandledException
>         at org.apache.beehive.netui.pageflow.internal.DefaultExceptionsHandler.handleException(DefaultExceptionsHandler.java:117)
>         at org.apache.beehive.netui.pageflow.FlowController.handleException(FlowController.java:259)
>         at org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.handleException(PageFlowRequestProcessor.java:680)
>         at org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.processInternal(PageFlowRequestProcessor.java:620)
>         at org.apache.beehive.netui.pageflow.PageFlowRequestProcessor.process(PageFlowRequestProcessor.java:886)
>         at org.apache.beehive.netui.pageflow.AutoRegisterActionServlet.process(AutoRegisterActionServlet.java:600)
>         at org.apache.beehive.netui.pageflow.PageFlowActionServlet.process(PageFlowActionServlet.java:163)
>         at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>         at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
>         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237)
>         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157)
>         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
>         at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
>         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>         at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
>         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
>         at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
>         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
>         at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
>         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
>         at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
>         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>         at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
>         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
>         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
>         at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
>         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
>         at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
>         at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
>         at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683)
>         at java.lang.Thread.run(Thread.java:595)

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