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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=13606 Compiler not thread safe [EMAIL PROTECTED] changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |REOPENED Resolution|INVALID | ------- Additional Comments From [EMAIL PROTECTED] 2002-10-14 17:51 ------- Ok.. I will be as descriptive as I can. I have a jsp page lets call it a.jsp I have two browser windows try and access a.jsp at the same time. If a.jsp has changed since last compile time or a.jsp has not been compiled then one browser window will get a NPE and the other will load the jsp page fine. This shows up more on a dual processor system then on a single. I have added the code from tomcat 5 o.a.j.c.Compiler to 4.1.12 that syncronizes the javac.execute() call try { synchronized(javacLock) { javac.execute(); } } catch (BuildException e) { success = false; } I believe what is happening is the first call to a.jsp starts to create the .java file, the second call then sees this .java file and attempts to compile it before the .java file is finished being generated or something like that. I have been unable to create a test outside of our application that has this behavior on a regular basis, but our application can reproduce it consistantly as its pages take a lot longer to compile. here is the stacktrace that it creates 2002-10-14 10:55:34 ApplicationDispatcher[] Servlet.service() for servlet jsp threw exception org.apache.jasper.JasperException at org.apache.jasper.servlet.JspServletWrapper.service (JspServletWrapper.java:248) at org.apache.jasper.servlet.JspServlet.serviceJspFile (JspServlet.java:289) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationDispatcher.invoke (ApplicationDispatcher.java:684) at org.apache.catalina.core.ApplicationDispatcher.doForward (ApplicationDispatcher.java:432) at org.apache.catalina.core.ApplicationDispatcher.forward (ApplicationDispatcher.java:356) at com.controlj.green.web.servlets.NavigationMapperServlet.doGet (NavigationMapperServlet.java:175) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:247) at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:193) at org.apache.catalina.core.StandardWrapperValve.invoke (StandardWrapperValve.java:260) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:643) at org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.core.StandardContextValve.invoke (StandardContextValve.java:191) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:643) at org.apache.catalina.authenticator.AuthenticatorBase.invoke (AuthenticatorBase.java:471) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:641) at org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.core.StandardContext.invoke (StandardContext.java:2396) at org.apache.catalina.core.StandardHostValve.invoke (StandardHostValve.java:180) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:643) at org.apache.catalina.valves.ErrorDispatcherValve.invoke (ErrorDispatcherValve.java:170) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:641) at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:172) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:641) at org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.core.StandardEngineValve.invoke (StandardEngineValve.java:174) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:643) at org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.connector.http.HttpProcessor.process (HttpProcessor.java:1040) at org.apache.catalina.connector.http.HttpProcessor.run (HttpProcessor.java:1151) at java.lang.Thread.run(Thread.java:536) ----- Root Cause ----- java.lang.NullPointerException at org.apache.jasper.servlet.JspServletWrapper.service (JspServletWrapper.java:204) at org.apache.jasper.servlet.JspServlet.serviceJspFile (JspServlet.java:289) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:240) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationDispatcher.invoke (ApplicationDispatcher.java:684) at org.apache.catalina.core.ApplicationDispatcher.doForward (ApplicationDispatcher.java:432) at org.apache.catalina.core.ApplicationDispatcher.forward (ApplicationDispatcher.java:356) at com.controlj.green.web.servlets.NavigationMapperServlet.doGet (NavigationMapperServlet.java:175) at javax.servlet.http.HttpServlet.service(HttpServlet.java:740) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:247) at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:193) at org.apache.catalina.core.StandardWrapperValve.invoke (StandardWrapperValve.java:260) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:643) at org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.core.StandardContextValve.invoke (StandardContextValve.java:191) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:643) at org.apache.catalina.authenticator.AuthenticatorBase.invoke (AuthenticatorBase.java:471) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:641) at org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.core.StandardContext.invoke (StandardContext.java:2396) at org.apache.catalina.core.StandardHostValve.invoke (StandardHostValve.java:180) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:643) at org.apache.catalina.valves.ErrorDispatcherValve.invoke (ErrorDispatcherValve.java:170) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:641) at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:172) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:641) at org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.core.StandardEngineValve.invoke (StandardEngineValve.java:174) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:643) at org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.connector.http.HttpProcessor.process (HttpProcessor.java:1040) at org.apache.catalina.connector.http.HttpProcessor.run (HttpProcessor.java:1151) at java.lang.Thread.run(Thread.java:536) if you need more information short of access to my computer please just ask. -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
