On 16/07/2010 06:49, Matt Peterson wrote:
While load testing our clustered Tomcats, we are seeing the following stack
trace in our catalina.out occasionally, but not regularly:
Jul 16, 2010 3:34:49 PM org.apache.catalina.ha.session.DeltaManager
messageReceived
SEVERE: Manager [localhost#/urs]: Unable to receive message through TCP
channel
java.lang.IllegalStateException: removeAttribute: Session already
invalidated
<snip/>
Under what conditions would this occur? Could it be that a session diff is
being transmitted, but the session it relates to has been invalidated by the
time the diff is processed (via a user logout for example)? Or could it be
that a timeout has been reached???
Someone at $work has been doing a load test with tc Server (which has
identical code to Tomcat in this area) and seen the same issue. I know
it isn't due to timeout since the sessions are only a few seconds old
when it happens. My current guess is that the messages are not being
processed in the same order as they are sent. I need to dig into this
more to figure out if this is a configuration issue or a bug.
I did wonder if switching to channel send options 6 would fix it. I'll
get them to try that and see.
Mark
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org
For additional commands, e-mail: users-h...@tomcat.apache.org
