Error running Jasper Reports for more than100 user

[Nithya Venkatesh]

I have created a web application with Jasper reports. during the stress test, we were able to run the same report simultaneously for 100 concurrent users, after that we get the following error. I hope there is no problem in my code (correct me if i am wrong)
We use Web Sphere

The error we get is as follows:

The path it searches for the file is correct

  java.io.FileNotFoundException: /.../.../.../../.../..*.war/reports/reportfile.jasper (Too many open files)
         at java.io.FileInputStream.open(Native Method)
         at java.io.FileInputStream.(FileInputStream.java:106)
         at com.wily.introscope.agent.probe.io.ManagedFileInputStream.(ManagedFileInputStream.java:89)
         at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:85)
         at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:64)
         at com.workforcesoftware.servlets.ReportServlet2.getCompiledReport(ReportServlet2.java:712)
         at com.workforcesoftware.servlets.ReportServlet2.doPost(ReportServlet2.java:423)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
         at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java:110)
         at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java:174)
         at com.ibm.ws.webcontainer.servlet.ServicingServletState.service(StrictLifecycleServlet.java:333)
         at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java:116)
         at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:283)
         at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java:42)
         at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java:40)
         at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:61)
         at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:1009)
         at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:529)
         at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:208)
         at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:134)
         at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:321)
         at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:71)
         at com.ibm.ws.webcontainer.cache.invocation.CacheableInvocationContext.invoke(CacheableInvocationContext.java:120)
         at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:250)
         at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSEListener.java:334)
         at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection.java:56)
         at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:652)
         at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:448)
         at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:937)
 
NESTED BY :
net.sf.jasperreports.engine.JRException: Error loading object from file : /.../.../.../../.../..*.war/reports/reportfile.jasper 
         at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:92)
         at net.sf.jasperreports.engine.util.JRLoader.loadObject(JRLoader.java:64)
         at com.workforcesoftware.servlets.ReportServlet2.getCompiledReport(ReportServlet2.java:712)
         at com.workforcesoftware.servlets.ReportServlet2.doPost(ReportServlet2.java:423)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
         at com.ibm.ws.webcontainer.servlet.StrictServletInstance.doService(StrictServletInstance.java:110)
         at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet._service(StrictLifecycleServlet.java:174)
         at com.ibm.ws.webcontainer.servlet.ServicingServletState.service(StrictLifecycleServlet.java:333)
         at com.ibm.ws.webcontainer.servlet.StrictLifecycleServlet.service(StrictLifecycleServlet.java:116)
         at com.ibm.ws.webcontainer.servlet.ServletInstance.service(ServletInstance.java:283)
         at com.ibm.ws.webcontainer.servlet.ValidServletReferenceState.dispatch(ValidServletReferenceState.java:42)
         at com.ibm.ws.webcontainer.servlet.ServletInstanceReference.dispatch(ServletInstanceReference.java:40)
         at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:61)
         at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.handleWebAppDispatch(WebAppRequestDispatcher.java:1009)
         at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.dispatch(WebAppRequestDispatcher.java:529)
         at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:208)
         at com.ibm.ws.webcontainer.srt.WebAppInvoker.doForward(WebAppInvoker.java:134)
         at com.ibm.ws.webcontainer.srt.WebAppInvoker.handleInvocationHook(WebAppInvoker.java:321)
         at com.ibm.ws.webcontainer.cache.invocation.CachedInvocation.handleInvocation(CachedInvocation.java:71)
         at com.ibm.ws.webcontainer.cache.invocation.CacheableInvocationContext.invoke(CacheableInvocationContext.java:120)
         at com.ibm.ws.webcontainer.srp.ServletRequestProcessor.dispatchByURI(ServletRequestProcessor.java:250)
         at com.ibm.ws.webcontainer.oselistener.OSEListenerDispatcher.service(OSEListener.java:334)
         at com.ibm.ws.webcontainer.http.HttpConnection.handleRequest(HttpConnection.java:56)
         at com.ibm.ws.http.HttpConnection.readAndHandleRequest(HttpConnection.java:652)
         at com.ibm.ws.http.HttpConnection.run(HttpConnection.java:448)
         at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:937)
  

if this really cannot find the file, then how could it run successfully for 100 users?
Have anyone experienced this problem?

Thanks for your help.

[Purushoth Thambu]

You have to increase the user setting for max file descriptors (first the soft limit if this doesn't work then the hard limit). The below link show the command and various options.
http://www.ss64.com/bash/ulimit.html
http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp?topic=/com.ibm.aix.cmds/doc/aixcmds5/ulimit.htm

I believe the OS is *INX variant.