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From Filip Hanik - Dev Lists <devli...@hanik.com>
Subject Re: ConcurrentModificationException on tomcat cluster with SimpleTcpCluster strategy
Date Tue, 22 Jan 2008 23:36:54 GMT
if you look at the stack trace, there is no error in the clustering 
code. something is modifying your session attribute while the cluster is 
trying to send it

Filip

Christopher Schultz wrote:
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> Filip,
>
> Filip Hanik - Dev Lists wrote:
> | the solution is to not store stuff in the session modified by other
> | threads, if that's the case, then its not really something you wanna
> | store in a session
>
> What's wrong with modifying something in a session? It's not being
> modified by "other threads"... it's being modified by request-handling
> threads. The only synchronization issue is that the replication code
> basically needs to take a snapshot of the session, but that's not
> possible because there is no standard way to do it.
>
> I suppose if you have to modify something in the session, you can
> copy-and-modify and then put it back... but that's not very efficient.
>
> - -chris
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