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http://issues.apache.org/bugzilla/show_bug.cgi?id=31450 NullpointerException in CompilerAdapterFactory.doesModernCompilerExist() Summary: NullpointerException in CompilerAdapterFactory.doesModernCompilerExist() Product: Ant Version: 1.6.2 Platform: Other OS/Version: Linux Status: NEW Severity: Major Priority: Other Component: Core tasks AssignedTo: [EMAIL PROTECTED] ReportedBy: [EMAIL PROTECTED] I am running tomcat 4.1.30 (with ant.jar included) on an AMD64 Red Hat AS 3.0 I used both the j2se for linux (32bit) and the blackdown implementation for AMD64. The stacktrace points to line 178 in CompilerAdapterFactory: try { CompilerAdapterFactory.class.getClassLoader().loadClass(MODERN_COMPILER); return true; } catch (ClassNotFoundException cnfe2) { } Aparently the getClassLoader() method returns null. According to the api documentation this is possible for some implementations. As a result tomcat is unable to compile jsp's (jsp -> servlet works, servlet -> class doesn't) It would be a good idea to catch the NullpointerException and add a line of logging. org.apache.jasper.JasperException: Unable to compile class for JSP at org.apache.jasper.JspCompilationContext.compile (JspCompilationContext.java:478) at org.apache.jasper.servlet.JspServletWrapper.service (JspServletWrapper.java:190) 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:256) 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.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:2422) at org.apache.catalina.core.StandardHostValve.invoke (StandardHostValve.java:180) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:643) at org.apache.catalina.valves.ErrorDispatcherValve.invoke (ErrorDispatcherValve.java:171) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:641) at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:163) 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:534) ----- Root Cause ----- java.lang.NullPointerException at org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.doesModernCompile rExist(CompilerAdapterFactory.java:178) at org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.getCompiler (CompilerAdapterFactory.java:132) at org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:969) at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:799) at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:320) at org.apache.jasper.compiler.Compiler.compile(Compiler.java:370) at org.apache.jasper.JspCompilationContext.compile (JspCompilationContext.java:473) at org.apache.jasper.servlet.JspServletWrapper.service (JspServletWrapper.java:190) 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:256) 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.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:2422) at org.apache.catalina.core.StandardHostValve.invoke (StandardHostValve.java:180) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:643) at org.apache.catalina.valves.ErrorDispatcherValve.invoke (ErrorDispatcherValve.java:171) at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNex t(StandardPipeline.java:641) at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:163) 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:534) --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
