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Posted to dev@commons.apache.org by bu...@apache.org on 2005/10/05 03:41:54 UTC
DO NOT REPLY [Bug 36927] New: - disabling of TCCL

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http://issues.apache.org/bugzilla/show_bug.cgi?id=36927

           Summary: disabling of TCCL
           Product: Commons
           Version: unspecified
          Platform: Other
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Logging
        AssignedTo: commons-dev@jakarta.apache.org
        ReportedBy: dvoytenko@reveredata.com


I separated this request from 35774 as it seems to provide a viable and easy 
solution to a big number of ClassLoader-related problems of using JCL in shared 
environments. The solution relies on having an option (configured via system 
properties) to disable TCCL usage and only use LogFactory's ClassLoader. When 
TCCL is disabled, logger implementation and caching should be performed in the 
JCL's ClassLoader only (cache will be reduced to a single record). This would 
remove any memory leak issues as well as other inconsitencies (see 35774 for 
some samples). 

There're two main scenarios how JCL is used in the shared environment: a) 
deployed in the shared class loader (shared for Tomcat and UCL for JBoss), b) 
deployed in the application's class loader in the child-first ClassLoader 
setup. In both cases this solution works well and disabled TCCL could even be a 
reasonable default (though it depends on other uses). In case of deployment 
within application's classloader (case [b]), two versions of JCL can coexist 
redirecting logs for the application's classes to application's LogFactory 
instance and shared classes to shared LogFactory.

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