Dennis wrote:
>I've been working with a cluster of tomcat servers and wanted to change
>the useDirtyFlag to false so that the session is replicated after every
>request whether or not it was changed.
>
>Here is my modified server.xml fragment:
>---CUT---
>
>managerClassName="org.apache.catalina.cluster.session.DeltaManager"
> expireSessionsOnShutdown="false"
> useDirtyFlag="false"
>---END CUT---
>
>
To answer my own problem.. DeltaManager ignores the useDirtyFlag. I
changed it to SimpleTcpReplicationManager and got the desired effect.
Possibly DeltaManager has a bug because the session, although changed,
was not replicated.
>After restarting the servers in the cluster, I noticed that the behavior
>was the same as with the flag set to true. Objects in the session
>quickly become out of sync across the multiple servers because they are
>getting modifed but setAttribute is not being called.
>
>I searched around google and the mail archive a bit but didn't find any
>references to people having trouble with this. Before I started digging
>in the clustering code, I thought I'd see if anyone has any idea as to
>whether or not I have the correct expectation of the useDirtyFlag or if
>there might be some other problem.
>
>I'm using Tomcat 5.5.9.
>
>Thanks
>Dennis
>
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