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From "Ernest Pasour (JIRA)" <j...@apache.org>
Subject [jira] Created: (LANG-626) object cloning with SerializationUtils has classloader problems with no workaround
Date Fri, 18 Jun 2010 19:55:23 GMT
object cloning with SerializationUtils has classloader problems with no workaround
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                 Key: LANG-626
                 URL: https://issues.apache.org/jira/browse/LANG-626
             Project: Commons Lang
          Issue Type: Bug
          Components: lang.*
         Environment: WebLogic 10.3
            Reporter: Ernest Pasour


In WebLogic 10.3, commons_lang is included on the main classpath, trumping the commons_lang
on a webapp classpath (in webinf/lib).  This causes ClassNotFoundException errors when using
SerializationUtils.clone() because Java serialization uses the classloader of the current
class (class invoked from) when doing serialization.  Java serialization does not respond
to the thread context classloader.

Fix: The following web page suggests a fix (including the full source code) that honors the
context classloader if set.  I don't know if this is the ideal solution, but at least it allows
the problem to be worked around without affecting working behavior for existing clients.
http://www.mail-archive.com/commons-dev@jakarta.apache.org/msg44524.html

Workaround: There is a flag to set on weblogic that inverts the classloader.  *HOWEVER*, this
only works if the webapp does not need certain xml jars.   Otherwise, WebLogic will fail to
start because *it* has classloader issues.    Therefore, this is not an acceptable workaround.
 

Another workaround: The only workaround I know of is to copy the SerializationUtils class
into a different package in my app so that the proper invocation context will be used for
serialization.  This is very undesirable.

I found these 3 bugs in the database that all seem to be the same problem.  
https://issues.apache.org/jira/browse/OJB-140
https://issues.apache.org/jira/browse/LANG-241
https://issues.apache.org/jira/browse/JS2-831



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