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From vsha...@optonline.net
Subject LogConfigurationException while using STRUTS with two applications in same App Server
Date Mon, 08 Mar 2004 16:54:12 GMT
We are running two STRUTS 1.0 applications using Log4j 1.2.6 in iPlanet 6.5 Application servers.
We have deployed struts  (1.0), commons-beanutils (1.6), common-collections (2.1), 
commons-digester (1.5), commons-logging (1.0.3), commons-validator (1.0.2) and  log4j1.2.6
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 loads 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.
THANKS.

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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