CFMX 6.1 Memory Leak?

[jarviswabi]

I've been chasing down the cause of JVM memory spikes for the last few weeks,
and am getting closer to finding the source. Basically, our CFMX 6.1 server
will periodically spike its JVM memory, going from 200Mb (normal running level)
to 1Gb+ in a matter of minutes. We had a Microsoft Operations Manager rule
monitoring the JRUN memory usage and restarting the CFMX service at 1GB as a
preventative measure, but realized that was hurting more than it was helping.
So we've removed that rule, and given the JVM 1.5Gb to play with. I added
SeeFusion for monitoring, and am capturing my JVM heap stats every two minutes
so I can see the spikes.

Over the last two days, I caught two such incidents, and in both cases, there
were scheduled jobs that had not finished appearing in SeeFusion as "active",
but didn't appear to be doing anything. The jobs that got "stuck" do a series
of database reads through a JDBC driver, and normally finish each query in
milliseconds, but in these cases it looks like it hits a query that doesn't
return a result, and the process just hangs out forever, ignoring the timeout I
set in the Scheduled Task setup. But what's really strange is that this
process was sitting there doing nothing for 3 hours, and the JVM stayed nice
and steady at 200Mb, then all of a sudden it spiked up to 1.5Gb in a matter of
minutes, with no other active requests, and nothing visibly happening in that
process. So it looks to me like a memory leak of some sort, but all in a
matter of minutes rather than a gradual thing.

Also, at some point, the JVM maxed out at 1.5Gb used, and ColdFusion
restarted. Will it restart itself when it hits that point? Our MOM logs don't
show that MOM did it (we have the rule set to 1.5Gb) like it used to, but maybe
that program is buggy. I didn't realize ColdFusion could bounce itself when
needed, but maybe I missed that. It would be sort of nice if it was that smart.

[tompeer1]

Did you ever resolve this issue. We're getting the same problem. I've posted to this thread:

[url]http://www.adobe.com/cfusion/webforums/forum/messageview.cfm?catid=143&threadid=793215[/url]

[Unregistered]

Nice article.

Another good tool I found with excellent UI and qualitative memory analysis, http://appdynamics.com/documents/white_papers/WP_MEMORY_LEAKS.pdf. Have been using it for some time now and find it super friendly.