Do you also have performance data for the front end machines?
What OS are you running?Would definitely recommending installing sar (or sysstat package) if you are running linux.
If Linux, which kernel? If it really is heap, have a look at:http://hausheer.osola.com/docs/5 for a simple description on how to fix this...
Below is the google link which shows how this was found.... http://www.google.com/search?rls=en-us&q=java.lang.OutOfMemoryError:+Java+heap+space&ie=UTF-8&oe=UTF-8
The thing I am wondering also is why it shuts down cleanly sometimes. Is there something internally that triggers that with this version of Tomcat, would an out of heap memory situation cause that. Maybe its in one of the logs but I am still going through all of them. There are multiple megs ofthem.
Are you sure it shuts down cleanly - this seems strange - you may want to chnage `ulimit -c 1000` so that you can see whether it really core dumps or not.... what does `ps auxH` report on your machine? How much memory is the thing using? How high have you configured your memory settings for the JVM? Cheers Andrew
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