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From Chester Twomey <>
Subject Portlet plugin and model driven
Date Tue, 29 May 2012 20:56:10 GMT

I am trying to implement a form within a portlet using the model
driven interface, and the portlet plugin inside of a clustered
environment.  Each time I submit the form I get this exception
SEVERE: Unable to serialize delta request for sessionid

I am using tomcat 6.0.33 with pluto portal 1.1.7.

Sample project to replicate: git://

Question also posted to

Am I setting anything up wrong?  Should I take a different approach?
It seems like when the portlet transitions from Action Phase to render
phase it attempts to put the entire stack into the session.  When i
step into the code struts2 objects cause the exception.  Initially i
suspected the convention plugin, but once removed i was left with the
same problem.


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