2008/1/23, David Avendasora <[EMAIL PROTECTED]>:
I'm sure I'm missing something obvious, but
resourceManager().pathURLForResourceNamed( "Resources/log4j.xml" ,
null, null)
in my Application.java class is returning null when I run my app.
The log4j.xml is in the /Resources/ directory (in both the build
and dist directories) and flagged as a Resource. Why isn't it
being found? It seems to be an intermittent problem as it has done
this before and then suddenly started working.
I get the following NPE in Eclipse Run Log:
[2008-01-23 07:47:16 EST] <main> A fatal exception occurred: null
[2008-01-23 07:47:16 EST] <main> java.lang.NullPointerException
at com.bestmaid.bakeryManagement.server.Application.<init>
( Application.java:38 )
at sun.reflect.NativeConstructorAccessorImpl.newInstance0( Native
Method )
at sun.reflect.NativeConstructorAccessorImpl.newInstance
( NativeConstructorAccessorImpl.java:39 )
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance
( DelegatingConstructorAccessorImpl.java:27 )
at java.lang.reflect.Constructor.newInstance( Constructor.java:494 )
at java.lang.Class.newInstance0( Class.java:350 )
at java.lang.Class.newInstance( Class.java:303 )
at com.webobjects.appserver.WOApplication.main( WOApplication.java:
323 )
at com.bestmaid.bakeryManagement.server.Application.main
( Application.java:23 )
I get the following from Tomcat when it tries to start the
deployed application:
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0( Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke
( NativeMethodAccessorImpl.java:39 )
at sun.reflect.DelegatingMethodAccessorImpl.invoke
( DelegatingMethodAccessorImpl.java:25 )
at java.lang.reflect.Method.invoke( Method.java:585)
at com.webobjects.jspservlet.WOServletAdaptor._applicationInit
( WOServletAdaptor.java:415 )
at com.webobjects.jspservlet.WOServletAdaptor.initStatics
( WOServletAdaptor.java:78 )
at com.webobjects.jspservlet.WOServletAdaptor.init
( WOServletAdaptor.java:629 )
at javax.servlet.GenericServlet.init( GenericServlet.java:212)
at org.apache.catalina.core.StandardWrapper.loadServlet
( StandardWrapper.java:1161 )
at org.apache.catalina.core.StandardWrapper.load
( StandardWrapper.java:981 )
at org.apache.catalina.core.StandardContext.loadOnStartup
( StandardContext.java:4045 )
at org.apache.catalina.core.StandardContext.start
( StandardContext.java:4351 )
at org.apache.catalina.core.ContainerBase.addChildInternal
( ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild
( ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild
( StandardHost.java:525)
at org.apache.catalina.startup.HostConfig.deployDescriptor
( HostConfig.java:626)
at org.apache.catalina.startup.HostConfig.deployDescriptors
( HostConfig.java:553)
at org.apache.catalina.startup.HostConfig.deployApps
( HostConfig.java:488)
at org.apache.catalina.startup.HostConfig.start( HostConfig.java:
1138)
at org.apache.catalina.startup.HostConfig.lifecycleEvent
( HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent
( LifecycleSupport.java:117 )
at org.apache.catalina.core.ContainerBase.start
( ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start( StandardHost.java:
719)
at org.apache.catalina.core.ContainerBase.start
( ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start
( StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start
( StandardService.java:516 )
at org.apache.catalina.core.StandardServer.start
( StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start( Catalina.java:566)
at sun.reflect.NativeMethodAccessorImpl.invoke0( Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke
( NativeMethodAccessorImpl.java:39 )
at sun.reflect.DelegatingMethodAccessorImpl.invoke
( DelegatingMethodAccessorImpl.java:25 )
at java.lang.reflect.Method.invoke( Method.java:585)
at org.apache.catalina.startup.Bootstrap.start( Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main( Bootstrap.java:413)
Caused by: com.webobjects.foundation.NSForwardException
[java.lang.NullPointerException] null:
<com.bestmaid.bakeryManagement.server.Application> failed
instantiation. Exception thrown :
java.lang.NullPointerException : null
at
com.webobjects.foundation._NSUtilities._explainInstantiationException
( _NSUtilities.java:567)
at com.webobjects.foundation._NSUtilities.instantiateObject
( _NSUtilities.java:581)
at com.webobjects.appserver.WOApplication.primeApplication
( WOApplication.java:411)
... 34 more
If I comment the following out of the Application.java file, it
will launch:
URL configURL = resourceManager().pathURLForResourceNamed
("Resources/log4j.xml", null, null );
NSLog.out .appendln("Initializing log4j from " + configURL.toString
());
DOMConfigurator.configure(configURL);
try:
resourceManager().pathURLForResourceNamed( "log4j.xml", null, null)
Thanks,
Dave
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