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From Richard Sitze <rsi...@us.ibm.com>
Subject Re: [logging] releasing log4j resources
Date Mon, 07 Feb 2005 21:34:25 GMT
robert burrell donkin <robertburrelldonkin@blueyonder.co.uk> wrote on 
02/07/2005 02:45:28 PM:

> certainly the web application deployer should know :)
> 
> IIRC it should be possible to tap into lifecycle events and perform the
> shutdown by creating a small amount of code external to the actual
> application. 
> 
> anyone object to me marking this one as WONTFIX?

+1 to mark as WONTFIX.

JCL *uses* a logger implementation, it shouldn't attempt to configure it 
or manage it.

Consider:

         Parent [commons-logging-api.jar, Log4j]
            |
       +----+----+
       |         |
     ChildA    ChildB [uses Log,
                       Log bound to Log4JLogger,
                       Log4JLogger bound to LogFactoryImpl,
                       LogFactoryImpl instance bound to ChildB]

When ChildB is disposed of, we currently do not have anyway of recognizing 
that the LogFactoryImpl using Log4J is being managed by Parent or ChildB. 
The ChildB classloader, or rather the LogFactoryImpl, should not attempt 
to manage this resource, as that may cause problems for both Parent and 
ChildA.


> 
> - robert
> 
> On Mon, 2005-02-07 at 20:02, Ceki Gülcü wrote:
> > Shouldn't this web-app which apparently knows it is using log4j call 
> > LogManger.shutdown() directly?
> > 
> > At 09:05 PM 2/7/2005, you wrote:
> > >http://issues.apache.org/bugzilla/show_bug.cgi?id=32662 describes an
> > >issues that arises when restarting web apps in tomcat. JCL bridges to
> > >log4j which has a rolling file appender configured. the file appender
> > >doesn't roll when the application is restarted. the proposed solution 
is
> > >to add a call to LogManager.shutdown.
> > >
> > >i'm a little worried that calling shutdown may be inappropriate in 
this
> > >circumstance the JVM isn't closing, just a web application. before i
> > >take this question to the log4j lists, i wondered whether any log4j
> > >experts would be so kind as to either confirm my concerns or set my 
mind
> > >at ease.
> > >
> > >- robert
> > >
> > >
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> 
> 
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*******************************************
Richard A. Sitze
IBM WebSphere WebServices Development

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