What Kieran said about jstack (but never ask him for database advice :-
P). If your sessions are deadlocking, that will point it out.
Otherwise, check your sleep() and terminate() methods in Session. If
you have any code in them, make it like this:
public void sleep() {
try {
// your code here
}
finally {
super.sleep();
}
}
If you are using 5.3 and have a logout method that calls
session.terminate(), users double clicking on the logout link can also
do this.
Chuck
On Mar 9, 2010, at 7:02 PM, Kieran Kelleher wrote:
Use jstack to see the stack traces of the deadlocked request threads.
Also Wonder has a SessionDeadlock detection feature that is useful
to trap session deadlocks, report them and fix them. I have found
that to be the most useful way to find bugs that cause sesion
deadlocks. In my case, and this was a long time ago so the details
are hazy, Session deadlocks were being caused by an error in
appendToResponse of the ExcelGenerator wrapper because the Wonder
install had "merged" with old versiona and I had two versions of the
same POI jar in the deployed framework.
HTH, Kieran
On Mar 9, 2010, at 9:40 PM, Paul Hoadley wrote:
On 10/03/2010, at 1:04 PM, Chuck Hill wrote:
Did the app actually stop and restart the previous night? If you
have a stuck session, it will start refusing sessions, but it
can't actually stop and restart. That sounds like what you are
seeing.
Ah, bingo. It didn't stop and restart.
JavaMonitor is telling me there are 13 active sessions, and I can
guarantee that there are not 13 users currently logged in. Where
do I start looking to debug these stuck sessions?
--
Paul.
http://logicsquad.net/
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--
Chuck Hill Senior Consultant / VP Development
Practical WebObjects - for developers who want to increase their
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