java.lang.NullPointerException

Oracle Community | 807594 | 1 decade ago
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    How to understand error messages

    Oracle Community | 1 decade ago | 807594
    java.lang.NullPointerException

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at com.desres.servlet.Final.doGet()
    2. com.desres.servlet
      Final.doGet
      1. com.desres.servlet.Final.doGet(Final.java:48)
      1 frame
    3. JavaServlet
      HttpServlet.service
      1. javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
      2. javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
      2 frames
    4. Glassfish Core
      ContainerBase.invoke
      1. org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
      2. org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
      3. org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
      4. org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      5. org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      6. org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      7. org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
      8. org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      9. org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      10. org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      11. org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2415)
      12. org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
      13. org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      14. org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
      15. org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      16. org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)
      17. org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
      18. org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      19. org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      20. org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
      21. org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
      22. org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
      23. org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
      23 frames
    5. org.apache.coyote
      CoyoteAdapter.service
      1. org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
      1 frame
    6. Embedded GlassFish Web
      SocketConnection.runIt
      1. org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:261)
      2. org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:360)
      3. org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:604)
      4. org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:562)
      5. org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:679)
      5 frames
    7. Tomcat Util
      ThreadPool$ControlRunnable.run
      1. org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:530)
      1 frame
    8. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:536)
      1 frame