Hi
I am new to Jboss. I was using iplanet prior to this. My web application is 
using log4j for logging. But how the log4j be configured with Jboss, I am not 
able to find out. I have tried by putting log4j.properties file in the 
WEB-INF/classes folder and the log4j jar file in WEB-INF/lib folder. But on 
running my web application it is not generating any log files, as configured by 
me in log4j.properties file. Instead it is showing exception in the 
"server.log" file.
The exception is 
2006-10-24 13:10:29,354 INFO  [STDOUT] log4j:ERROR A 
"org.jboss.logging.util.OnlyOnceErrorHandler" object is not assignable to a 
"org.apache.log4j.spi.ErrorHandler" variable.
2006-10-24 13:10:29,354 INFO  [STDOUT] log4j:ERROR The class 
"org.apache.log4j.spi.ErrorHandler" was loaded by 
2006-10-24 13:10:29,354 INFO  [STDOUT] log4j:ERROR [WebappClassLoader
  delegate: false
  repositories:
    /WEB-INF/classes/
----------> Parent Classloader:
[EMAIL PROTECTED]
] whereas object of type 
2006-10-24 13:10:29,354 INFO  [STDOUT] log4j:ERROR 
"org.jboss.logging.util.OnlyOnceErrorHandler" was loaded by [EMAIL PROTECTED]
2006-10-24 13:10:29,463 INFO  [STDOUT] log4j:ERROR Could not create an 
Appender. Reported error follows.
2006-10-24 13:10:29,463 INFO  [STDOUT] java.lang.ClassCastException
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:175)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:150)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator.java:163)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigurator.java:425)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:394)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:829)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:712)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:618)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:468)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
org.apache.log4j.LogManager.(LogManager.java:122)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
org.apache.log4j.Logger.getLogger(Logger.java:104)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
com.siemens.ppas.crm.model.LoadWorkForce.(LoadWorkForce.java:35)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
com.siemens.ppas.crm.servlet.CompManageServlet.doPost(CompManageServlet.java:87)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
2006-10-24 13:10:29,463 INFO  [STDOUT]  at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at java.lang.Thread.run(Thread.java:534)
2006-10-24 13:10:29,479 INFO  [STDOUT] log4j:ERROR Could not parse url 
[file:/D:/jboss-4.0.3SP1/server/default/conf/log4j.xml].
2006-10-24 13:10:29,479 INFO  [STDOUT] java.lang.NullPointerException
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
java.util.Hashtable.put(Hashtable.java:393)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:151)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator.java:163)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigurator.java:425)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:394)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:829)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:712)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:618)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:468)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.log4j.LogManager.(LogManager.java:122)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.log4j.Logger.getLogger(Logger.java:104)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
com.siemens.ppas.crm.model.LoadWorkForce.(LoadWorkForce.java:35)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
com.siemens.ppas.crm.servlet.CompManageServlet.doPost(CompManageServlet.java:87)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:39)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:159)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:59)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
2006-10-24 13:10:29,479 INFO  [STDOUT]  at 
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
2006-10-24 13:10:29,495 INFO  [STDOUT]  at 
org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112)
2006-10-24 13:10:29,495 INFO  [STDOUT]  at java.lang.Thread.run(Thread.java:534)


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