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Date: Sun, 02 Jul 2006 17:44:30 -0400
From: Avi Deitcher <avi@deitcher.net>
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To: Tomcat Users List <users@tomcat.apache.org>
Subject: Re: log4j in webapp hanging Tomcat?
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To add to it: I kept two webapps running and had them
System.out.println(logger), where each is in the same category/class, to
check that each one is running its own; it is. I then removed every
webapp I could and ran it again with just the simple filter + index.jsp
to check. Same result. Sigh.

Avi Deitcher wrote:

>Hello Boris,
>
>Not much luck. I verified that I am running the latest versions of
>commons-logging and log4j. I kept log4j direct in the webapp to avoid
>any chance of commons-logging getting confused, as described in the
>article below. I also removed any reference to log4j or commons-logging
>from shared/ and common/.
>
>I tried something even simpler: a single Web app in its own context with
>*nothing* but a /index.jsp and a single Filter class. No JSF, no
>facelets, no EL, nothing in WEB-INF/lib except for log4j-1.2.13.jar,
>which is the latest.... and it still hangs.
>
>This leaves the unavoidable conclusion that it *must* be some
>interaction between log4j and Tomcat. I can think of nothing else to try
>except following the commons-logging FUD page below, but I am unsure how
>that would impact.
>
>Help? :-(
>
>Boris Unckel wrote:
>
>  
>
>>Hello Avi,
>>
>>Avi Deitcher wrote:
>>
>>    
>>
>>>Boris,
>>>
>>>Thank you, too. The main issue here is that I *do* want to separate my
>>>webapp's logging from Tomcat's, so it can be fully self-contained.
>>>Hence, I included log4j.jar and log4j.properties within my own webapp,
>>>which should make a lot of sense. In the development case, I am pushing
>>>the logs to the console, which end up intermixes with Tomcat's logs, but
>>>that is an easy switch in log4j.properties. Also, it appears that
>>>x4juli, according to the Website, is not quite ready for production.
>>>
>>>Any idea why this would cause hanging?
>>>Avi
>>>      
>>>
>>If there is really a conflict between el and logj4j, try out the
>>following to be sure:
>>Please use the highest available version of log4j and commons-logging:
>>http://logging.apache.org/log4j/docs/download.html
>>http://jakarta.apache.org/site/downloads/downloads_commons-logging.cgi
>>
>>Follow the instructions in
>>http://wiki.apache.org/jakarta-commons/Commons_Logging_FUD
>>to separate container commons-logging and webapps commons-logging.
>>
>>Put log4j.jar in $CATALINA_HOME/server/lib and a log4j.properties in
>>$CATALINA_HOME/server/classes
>>
>>Take care to remove any log4j.jar and commons-logging-xx.jar from
>>$CATALINA_HOME/common/lib
>>or $CATALINA_HOME/shared/lib
>>
>>Take care that commons-logging or log4j is not present at
>>system-classpath due to your startup with Netbeans,
>>this may cause the problem. (Does the problem only occur with startup
>>in Netbeans? Does it occur standalone, too?)
>>
>>Put in logj4.jar in WEB-INF/lib and log4j.properties in
>>WEB-INF/classes as you desired with a webapp specific
>>configuration.
>>
>>Regards
>>Boris
>>
>>
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>>    
>>
>
>  
>

-- 
______________________________
Avi Deitcher
avi@deitcher.net


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