java.lang.NullPointerException

Coderanch | Darren Alexandria | 9 years ago
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    How to convert String to File object

    Coderanch | 9 years ago | Darren Alexandria
    java.lang.NullPointerException

    Root Cause Analysis

    1. java.lang.NullPointerException

      No message provided

      at org.apache.jsp.HttpUploadDB_jsp._jspService()
    2. org.apache.jsp
      HttpUploadDB_jsp._jspService
      1. org.apache.jsp.HttpUploadDB_jsp._jspService(HttpUploadDB_jsp.java:148)
      1 frame
    3. GWT dev
      HttpJspBase.service
      1. org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:98)
      1 frame
    4. JavaServlet
      HttpServlet.service
      1. javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
      1 frame
    5. GWT dev
      JspServlet.service
      1. org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:328)
      2. org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
      3. org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
      3 frames
    6. JavaServlet
      HttpServlet.service
      1. javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
      1 frame
    7. Glassfish Core
      CoyoteAdapter.service
      1. org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
      2. org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
      3. org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
      4. org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
      5. org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
      6. org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
      7. org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
      8. org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
      8 frames
    8. Grizzly HTTP
      LeaderFollowerWorkerThread.runIt
      1. org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)
      2. org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
      3. org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
      4. org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
      4 frames
    9. Tomcat Util
      ThreadPool$ControlRunnable.run
      1. org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
      1 frame
    10. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:595)
      1 frame