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http://issues.apache.org/bugzilla/show_bug.cgi?id=41059 ------- Additional Comments From [EMAIL PROTECTED] 2007-05-04 09:20 ------- This is causing a problem for me also and I think requires a fix other than the patch given here. I get the following stack trace which shows that the error occurs on Tomcat's clean up thread and therefore should be addressed with a more permanent fix. The problem arises because Tomcat tries to null a static/final field of a type that has not yet been loaded, which causes the class initializer to run. In my case, that initializer fetched a log from Commons Logging, which had (presumably) already been "cleaned up" by Tomcat, and threw an NPE. [FATAL] LoggingInit - Failed to obtain logger returning simple logger for CONFIG.com.commons.monitoring.util.Instrument <org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException) >org.apache.commons.logging.LogConfigurationException: java.lang.NullPointerException (Caused by java.lang.NullPointerException) at org.apache.commons.logging.impl.LogFactoryImpl.newInstance (LogFactoryImpl.java:538) at org.apache.commons.logging.impl.LogFactoryImpl.getInstance (LogFactoryImpl.java:235) at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:370) at com.commons.logging.LoggingInit.getLog(LoggingInit.java:334) at sun.reflect.GeneratedMethodAccessor22.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at com.commons.catalog.CatalogUtils.getLog(CatalogUtils.java:75) at com.commons.catalog.GenericTrace.<init>(GenericTrace.java:279) at com.commons.catalog.SimpleTrace.<init>(SimpleTrace.java:34) at com.commons.monitoring.util.Instrument.<clinit> (AbstractRuntimeInstrument.java:44) at sun.misc.Unsafe.ensureClassInitialized(Native Method) at sun.reflect.UnsafeFieldAccessorFactory.newFieldAccessor(Unknown Source) at sun.reflect.ReflectionFactory.newFieldAccessor(Unknown Source) at java.lang.reflect.Field.acquireFieldAccessor(Unknown Source) at java.lang.reflect.Field.getFieldAccessor(Unknown Source) at java.lang.reflect.Field.get(Unknown Source) at org.apache.catalina.loader.WebappClassLoader.clearReferences (WebappClassLoader.java:1612) at org.apache.catalina.loader.WebappClassLoader.stop (WebappClassLoader.java:1496) at org.apache.catalina.loader.WebappLoader.stop(WebappLoader.java:734) at org.apache.catalina.core.StandardContext.stop (StandardContext.java:4398) at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1067) at org.apache.catalina.core.ContainerBase.stop(ContainerBase.java:1067) at org.apache.catalina.core.StandardEngine.stop(StandardEngine.java:448) at org.apache.catalina.core.StandardService.stop (StandardService.java:510) at org.apache.catalina.core.StandardServer.stop(StandardServer.java:734) at org.apache.catalina.startup.Catalina.stop(Catalina.java:602) at org.apache.catalina.startup.Catalina.start(Catalina.java:577) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:295) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:433) Caused by: java.lang.NullPointerException Upgrading Commons Logging to v1.1 on Tomcat's server classpath removes the NPE but the problem isn't really fixed. Possible solution is to use two phases: first collect all the non-null Fields (Field.get will cause the declared type to be loaded) then null them. -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
