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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=7873

Null pointer renders servlet unusable with out tomcat restart

           Summary: Null pointer renders servlet unusable with out tomcat
                    restart
           Product: Tomcat 4
           Version: 4.0.3 Final
          Platform: PC
        OS/Version: Windows NT/2K
            Status: NEW
          Severity: Major
          Priority: Other
         Component: Unknown
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]


tomcat 4.03 - using coyote http connector
jdk 1.4

i have had this error three times now, always with the same servlet, which is a 
fairly heavily used small servlet.
The exception is as follows, it doesnt appear to be related to my code, as none 
of my classes are in the stack trace. And this has only started happening with 
tomcat 4.03.

java.lang.NullPointerException
        at org.apache.catalina.core.StandardWrapper.allocate
(StandardWrapper.java:673)
        at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:214)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:190)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
        at org.apache.catalina.valves.CertificatesValve.invoke
(CertificatesValve.java:246)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:564)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at org.apache.catalina.core.StandardContext.invoke
(StandardContext.java:2343)
        at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:180)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
        at org.apache.catalina.valves.ErrorDispatcherValve.invoke
(ErrorDispatcherValve.java:170)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:564)
        at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:170)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:564)
        at org.apache.catalina.valves.AccessLogValve.invoke
(AccessLogValve.java:468)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:564)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:174)
        at org.apache.catalina.core.StandardPipeline.invokeNext
(StandardPipeline.java:566)
        at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:472)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
        at org.apache.coyote.tomcat4.CoyoteProcessor.service
(CoyoteProcessor.java:313)
        at org.apache.coyote.http11.Http11Processor.process
(Http11Processor.java:331)
        at org.apache.coyote.tomcat4.CoyoteProcessor.process
(CoyoteProcessor.java:791)
        at org.apache.coyote.tomcat4.CoyoteProcessor.run
(CoyoteProcessor.java:870)
        at java.lang.Thread.run(Thread.java:536)

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