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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=15974 Original stack trace is lost Summary: Original stack trace is lost Product: Tomcat 4 Version: 4.1.18 Platform: PC OS/Version: Windows NT/2K Status: NEW Severity: Normal Priority: Other Component: Unknown AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] Hi, It seems that when an exception reaches the Jasper from an application, the component throws the root cause's stack trace away, keeping only the exception's message, which in some cases is not sufficient for the programmer to find the problem. I believe this change (possibly a bug) has been made since early versions of Tomcat 4.x, as the Tomcat 3.3a shows the complete stack trace. To isolate and demonstrate the problem, I've created a simple application, which consists of a Java class, and a JSP: -- Java class source code -- package com.test; public class StackTraceTest { public static void throwError() throws Exception { if (1 == 1) throw new Exception("just testing"); } } -- -- JSP source code -- <% com.test.StackTraceTest.throwError(); %> -- On Tomcat 4.1.18 (think early versions of 4.x does the same), it produces the following content, in the browser and in the log: -- HTTP Status 500 - type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception org.apache.jasper.JasperException: just testing at org.apache.jasper.servlet.JspServletWrapper.service (JspServletWrapper.java:248) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241) 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:493) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:641) at org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.catalina.core.StandardContext.invoke (StandardContext.java:2415) at org.apache.catalina.core.StandardHostValve.invoke (StandardHostValve.java:180) at org.apache.catalina.core.StandardPipeline$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$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:643) at org.apache.catalina.core.StandardPipeline.invoke (StandardPipeline.java:480) at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995) at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223) at org.apache.coyote.http11.Http11Processor.process (Http11Processor.java:432) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnectio n(Http11Protocol.java:386) at org.apache.tomcat.util.net.TcpWorkerThread.runIt (PoolTcpEndpoint.java:534) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run (ThreadPool.java:530) at java.lang.Thread.run(Thread.java:479) root cause javax.servlet.ServletException: just testing at org.apache.jasper.runtime.PageContextImpl.handlePageException (PageContextImpl.java:533) at org.apache.jsp.myError_jsp._jspService(myError_jsp.java:49) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:137) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.jasper.servlet.JspServletWrapper.service (JspServletWrapper.java:204) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:295) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:241) at javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:247) at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:193) at org.apache.catalina.core.StandardWrapperValve.invoke (StandardWrapperValve.java:260) at org.apache.catalina.core.StandardPipeline$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$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:643) at org.apache.catalina.authenticator.AuthenticatorBase.invoke (AuthenticatorBase.java:493) at org.apache.catalina.core.StandardPipeline$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:2415) 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.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223) at org.apache.coyote.http11.Http11Processor.process (Http11Processor.java:432) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnectio n(Http11Protocol.java:386) at org.apache.tomcat.util.net.TcpWorkerThread.runIt (PoolTcpEndpoint.java:534) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run (ThreadPool.java:530) at java.lang.Thread.run(Thread.java:479) Apache Tomcat/4.1.18 -- On the Tomcat 3.3a, the result is: -- Error: 500 Location: /eadweb/myError.jsp Internal Servlet Error: javax.servlet.ServletException: just testing at org.apache.jasper.runtime.PageContextImpl.handlePageException (Unknown Source) at myError_2._jspService(myError_2.java:63) at org.apache.jasper.runtime.HttpJspBase.service(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java) at org.apache.tomcat.facade.ServletHandler.doService(Unknown Source) at org.apache.tomcat.core.Handler.invoke(Unknown Source) at org.apache.tomcat.core.Handler.service(Unknown Source) at org.apache.tomcat.facade.ServletHandler.service(Unknown Source) at org.apache.tomcat.core.ContextManager.internalService(Unknown Source) at org.apache.tomcat.core.ContextManager.service(Unknown Source) at org.apache.tomcat.modules.server.Http10Interceptor.processConnection (Unknown Source) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(Unknown Source) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run (Unknown Source) at java.lang.Thread.run(Thread.java:479) Root cause: java.lang.Exception: just testing at com.eadweb.StackTraceTest.throwError(StackTraceTest.java:5) at myError_2._jspService(myError_2.java:53) at org.apache.jasper.runtime.HttpJspBase.service(Unknown Source) at javax.servlet.http.HttpServlet.service(HttpServlet.java) at org.apache.tomcat.facade.ServletHandler.doService(Unknown Source) at org.apache.tomcat.core.Handler.invoke(Unknown Source) at org.apache.tomcat.core.Handler.service(Unknown Source) at org.apache.tomcat.facade.ServletHandler.service(Unknown Source) at org.apache.tomcat.core.ContextManager.internalService(Unknown Source) at org.apache.tomcat.core.ContextManager.service(Unknown Source) at org.apache.tomcat.modules.server.Http10Interceptor.processConnection (Unknown Source) at org.apache.tomcat.util.net.TcpWorkerThread.runIt(Unknown Source) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run (Unknown Source) at java.lang.Thread.run(Thread.java:479) -- As you can see, on the 4.1.18 version, the root cause does not show the stack trace entering the "throwError" method of the class, as does the 3.3a version. In some cases, it's very important to know the complete root cause's stack trace, as the Tomcat internal's stack trace doesn't give me much information. Thanks, Tomy Inhauser -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
