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From Nicolai Marck Ødum (JIRA) <...@myfaces.apache.org>
Subject [jira] Created: (TRINIDAD-1812) Memory use is very high in J2EE cluster with session replication (Weblogic) when using pageflowscope
Date Fri, 21 May 2010 10:03:16 GMT
Memory use is very high in J2EE cluster with session replication (Weblogic) when using pageflowscope
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                 Key: TRINIDAD-1812
                 URL: https://issues.apache.org/jira/browse/TRINIDAD-1812
             Project: MyFaces Trinidad
          Issue Type: Bug
          Components: Components
    Affects Versions: 1.2.7-core
         Environment: Weblogic 10 and all versions forward.

            Reporter: Nicolai Marck Ødum
            Priority: Critical


In a Weblogic cluster with session replication the memory use (the size of the web session)
is much higher on the server that has a copy of the session then on the primary server.

The problem is related to multiple session attributes that have references to the same shared
object in Trinidad. This design has a negative side effect with Weblogic because of the transitive
closure ff session attributes. The shared object (and the object graph below it) is copied
for each attribute.

I have created a simple guide with a modified example of the demo application from Trinidad
that shows the problem.


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