We are running two STRUTS applications using Log4j in iPlanet 6.5 Application servers.
We have deployed struts, commons-beanutils, common-collections, commons-digester,
commons-logging, commons-validator and log4j under the WEB-INF/lib and packaged them
as separate ear files for each application separately. The Action servlet in each
application is deployed with a different name. Each application has an initializer
servlet that is invoked at application server startup and load the Log4J configuration.
The above works fine with only one application and also on occasion with both
applications. However, we are getting intermittent errors when running both
applications together when the requested JSP fails to load with an error in the
application server kjs logs. We have observed the following pattern of errors: (with
debugging turned on)
Always starts with one LogConfigurationException (see Error #1 below). This error does
not always happen at startup. It can happen even after some usage of the applications.
Once this error has occured, we get a java.lang.NoClassDefFoundError (see Error #2
below) when the JSP page load occurs in the application.
Has anyone seen this error ? Any insight would be much appreciated.
Error #1
------------
Loading servlet: App1Action
[06/Mar/2004 13:01:39:3] error: Exception: SERVLET-execution_failed: Error in
executing servlet EAMSAction: java.lang.ExceptionInInitializerError
Exception Stack Trace:
java.lang.ExceptionInInitializerError:
org.apache.commons.logging.LogConfigurationException:
org.apache.commons.logging.LogConfigurationException:
org.apache.commons.logging.LogConfigurationException:
Class org.apache.commons.logging.impl.Log4JLogger does not implement Log
at
org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:532)
at
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:272)
at
org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:246)
at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:395)
at org.apache.struts.action.ActionServlet.<clinit>(ActionServlet.java:375)
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Class.java:232)
at
com.netscape.server.servlet.servletrunner.ServletRepository.loadServlet(Unknown Source)
at
com.netscape.server.servlet.servletrunner.ServletRepository.createInstance(Unknown
Source)
at
com.netscape.server.servlet.servletrunner.ServletRunner.createServletInfo(ServletRunner.java:1237)
at com.netscape.server.servlet.servletrunner.AppInfo.preLoadServlets(Unknown
Source)
at com.netscape.server.servlet.servletrunner.AppInfo.resetServlets(Unknown
Source)
at com.netscape.server.servlet.servletrunner.AppInfo.<init>(Unknown Source)
at com.netscape.server.servlet.servletrunner.ServletModule.getAppInfo(Unknown
Source)
at
com.netscape.server.servlet.servletrunner.ServletRunner.getAppInfo(ServletRunner.java:1546)
at
com.netscape.server.servlet.servletrunner.ServletRunner.execute(ServletRunner.java:986)
at com.kivasoft.applogic.AppLogic.execute(AppLogic.java:152)
at com.kivasoft.applogic.AppLogic.execute(AppLogic.java:86)
at com.kivasoft.thread.ThreadBasic.run(Native Method)
at java.lang.Thread.run(Thread.java:479)
MessageHeaders:setHeaderField(): Invoking headers.put(name, value)
[06/Mar/2004 13:01:39:3] error: APPLOGIC-caught_exception: Caught Exception:
java.lang.ClassCastException: java.lang.ExceptionInInitializerError
at
com.netscape.server.servlet.servletrunner.ServletRunner.reportError(ServletRunner.java:1576)
at
com.netscape.server.servlet.servletrunner.ServletRunner.execute(ServletRunner.java:1002)
at com.kivasoft.applogic.AppLogic.execute(AppLogic.java:152)
at com.kivasoft.applogic.AppLogic.execute(AppLogic.java:86)
at com.kivasoft.thread.ThreadBasic.run(Native Method)
at java.lang.Thread.run(Thread.java:479)
Error #2: This happens when the application is accessing a page.
----------------------------------------------------------------------------------------------
Loading servlet: App1Action
[06/Mar/2004 13:38:23:7] error: Exception: SERVLET-execution_failed: Error in
executing servlet App1Action: java.lang.NoClassDefFoundError
Exception Stack Trace:
java.lang.NoClassDefFoundError
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Class.java:232)
at
com.netscape.server.servlet.servletrunner.ServletRepository.loadServlet(Unknown Source)
at
com.netscape.server.servlet.servletrunner.ServletRepository.createInstance(Unknown
Source)
at
com.netscape.server.servlet.servletrunner.ServletRunner.createServletInfo(ServletRunner.java:1237)
at com.netscape.server.servlet.servletrunner.AppInfo.preLoadServlets(Unknown
Source)
at com.netscape.server.servlet.servletrunner.AppInfo.resetServlets(Unknown
Source)
at com.netscape.server.servlet.servletrunner.AppInfo.<init>(Unknown Source)
at com.netscape.server.servlet.servletrunner.ServletModule.getAppInfo(Unknown
Source)
at
com.netscape.server.servlet.servletrunner.ServletRunner.getAppInfo(ServletRunner.java:1546)
at
com.netscape.server.servlet.servletrunner.ServletRunner.execute(ServletRunner.java:986)
at com.kivasoft.applogic.AppLogic.execute(AppLogic.java:152)
at com.kivasoft.applogic.AppLogic.execute(AppLogic.java:86)
at com.kivasoft.thread.ThreadBasic.run(Native Method)
at java.lang.Thread.run(Thread.java:479)
MessageHeaders:setHeaderField(): Invoking headers.put(name, value)
[06/Mar/2004 13:38:23:7] error: APPLOGIC-caught_exception: Caught Exception:
java.lang.ClassCastException: java.lang.NoClassDefFoundError
at
com.netscape.server.servlet.servletrunner.ServletRunner.reportError(ServletRunner.java:1576)
at
com.netscape.server.servlet.servletrunner.ServletRunner.execute(ServletRunner.java:1002)
at com.kivasoft.applogic.AppLogic.execute(AppLogic.java:152)
at com.kivasoft.applogic.AppLogic.execute(AppLogic.java:86)
at com.kivasoft.thread.ThreadBasic.run(Native Method)
at java.lang.Thread.run(Thread.java:479)
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