[jboss-user] [Clustering/JBoss] - Re: ConcurrentModificationException during session serializa

[smarlow@redhat.com]

Currently, deployed applications do not hold a RL lock while processing requests.  If we introduce a RL lock to be held while processing requests, will that be slower?  

There is some potential additional overhead to the ReadWriteLock (http://java.sun.com/j2se/1.5.0/docs/api/java/util/concurrent/locks/ReadWriteLock.html).

Perhaps it would be better (performance wise) to synchronize on the session level facade object as I think the performance should be close to what applications currently see (whether or not they also synchronize on the session object when accessing mutable attributes).  

What do you think?

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