[jboss-user] [Installation, Configuration & Deployment] - Log4j conflicts and classLoading nightmare in jboss 4.0.5

[meissa]

Hi all,

I'm seriousely tearing my hair off with jboss 4.0.5 classloding problems 

We're trying to migrate from jboss 4.0.3.SP1 to jboss 4.0.5.
About 10 applications are concerned (all of them are ears)  and each of them have their loader repository defined like below in jboss-app.xml file
Each application has it own log4j.jar 


<jboss-app>
    <loader-repository>nis_portail:loader=my_appXloader</loader-repository>
</jboss-app>


When we start Jboss after putting webapps in deploy directory.
We're getting the error messages below:

log4j:ERROR A "org.jboss.logging.util.OnlyOnceErrorHandler" object is not assignable to a "org.apache.log4j.spi.ErrorHandler" variable.
log4j:ERROR The class "org.apache.log4j.spi.ErrorHandler" was loaded by 
log4j:ERROR [org.jboss.mx.loading.UnifiedClassLoader3 at 7f30f8{ url=file:/D:/Documents/developpements/workspace/nis_portail_ear/deploy/portail_ear.ear/ ,addedOrder=48}] whereas object of type 
log4j:ERROR "org.jboss.logging.util.OnlyOnceErrorHandler" was loaded by [org.jboss.system.server.NoAnnotationURLClassLoader at 1a33d48].
log4j:ERROR Could not create an Appender. Reported error follows.
java.lang.ClassCastException: org.jboss.logging.appender.DailyRollingFileAppender
	at org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.java:165)
	at org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurator.java:140)
	at org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfigurator.java:153)
	at org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOMConfigurator.java:415)
	at org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:384)
	at org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:783)
	at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:666)
	at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:616)
	at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:602)
	at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:460)
	at org.apache.log4j.LogManager.(LogManager.java:113)
	at org.apache.log4j.Logger.getLogger(Logger.java:85)

I've seen in the forum that a solution to solve this problem is to remove
log4j.jar from application librairies.
I would like to know if there is not another solution because some applications MUST use spécific log4j.jar versions to log properly.
And all theses application worked fine  with JBoss4.0.3SP1

Any suggestion would be greatly appreciated.

Meissa


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