NullPointerException using Arrays.sort

[Zak Nixon]

This is the stack trace after I
setup Tomcat5 as a service. This
did NOT occur before installing it
as a service.

  
2004-06-17 09:51:03 StandardWrapperValve[default]: Servlet.service() for servlet default threw exception
java.lang.NullPointerException
at java.util.Arrays.sort(Unknown Source)
at org.apache.naming.resources.FileDirContext.list(FileDirContext.java:885)
at org.apache.naming.resources.FileDirContext.list(FileDirContext.java:306)
at org.apache.naming.resources.ProxyDirContext.list(ProxyDirContext.java:475)
at org.apache.catalina.servlets.DefaultServlet.renderHtml(DefaultServlet.java:1496)
at org.apache.catalina.servlets.DefaultServlet.render(DefaultServlet.java:1285)
at org.apache.catalina.servlets.DefaultServlet.serveResource(DefaultServlet.java:973)
at org.apache.catalina.servlets.DefaultServlet.doGet(DefaultServlet.java:448)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:697)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
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:117)
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:793)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:702)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:571)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:644)
at java.lang.Thread.run(Unknown Source)
 

Any hints?

Thanks

Zak

[Jonas Isberg]

Does it work when you comment out the call to sort, and does the call to sort
work if you run the same code from the console? Do you know the exact line in your code that calls the non-succesful sort? Is there anything on that line that possible could be null? Well... I don't have the code, so I am trying to make you debug it and solve it yourself. ;-)

[Mike Curwen]

J Isberg.. just take a look at the stacktrace and think about it.

None of the stacktrace contains any classes that Zak would have written. These are all tomcat/sun internal classes.

Zak... did you install tomcat twice? How about uninstalling, and then re-installing it with the service, all in one shot?

[Zak Nixon]

I tried to install it all at once, to no avail. I still
have the above stack trace.

Zak