When trying to implement Download Action, I got this exception. Can some
one help please ?
2005-08-21 20:14:15 StandardWrapperValve[docAction]: Servlet.service() for
servlet docAction threw exception
java.lang.NullPointerException
at org.apache.struts.actions.DownloadAction.copy
(DownloadAction.java:139)
at org.apache.struts.actions.DownloadAction.execute
(DownloadAction.java:112)
at org.apache.struts.action.RequestProcessor.processActionPerform
(RequestProcessor.java:419)
at org.apache.struts.action.RequestProcessor.process
(RequestProcessor.java:224)
at org.apache.struts.action.ActionServlet.process
(ActionServlet.java:1194)
at org.apache.struts.action.ActionServlet.doGet
(ActionServlet.java:414)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:284)
at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:204)
at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:257)
at org.apache.catalina.core.StandardValveContext.invokeNext
(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:564)
at org.apache.catalina.core.StandardContextValve.invokeInternal
(StandardContextValve.java:245)
at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:199)
at org.apache.catalina.core.StandardValveContext.invokeNext
(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:564)
at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:195)
at org.apache.catalina.core.StandardValveContext.invokeNext
(StandardValveContext.java:151)
at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:164)
at org.apache.catalina.core.StandardValveContext.invokeNext
(StandardValveContext.java:149)
at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:564)
at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:156)
at org.apache.catalina.core.StandardValveContext.invokeNext
(StandardValveContext.java:151)
at org.apache.catalina.core.StandardPipeline.invoke
(StandardPipeline.java:564)
at org.apache.catalina.core.ContainerBase.invoke
(ContainerBase.java:972)
at org.apache.coyote.tomcat5.CoyoteAdapter.service
(CoyoteAdapter.java:206)
at org.apache.coyote.http11.Http11Processor.process
(Http11Processor.java:828)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConn
ection(Http11Protocol.java:700)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt
(PoolTcpEndpoint.java:584)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run
(ThreadPool.java:683)
at java.lang.Thread.run(Thread.java:534)
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