JVM Stability

[Tim Jones_3]

We have a production environment with 24 web server instances running on 4 hosts (6 per). Each instance has a java connector tied to it, each running in it's own JVM.

The issue is stability. Our JVMs are fine with a low load, but once we get a little traffic they start crashing left and right, leaving core dumps as they go.

We are using jvm 1.2.2.05, with all the recommended patches for it and kernel parameter settings.

Could this problem be alleviated by upgrading the JVM? Are there any other issues that could be affecting stability? What is the best way to realistically stress our environment and figure out what the issue is?

Thanks,

Tim

[Santosh Nair_1]

I believe HP's patching policy on JVM is that they deliver the patches in the form of a new release of the JVM. The latest 1.2 release is 1.2.0.9. There were a lot of HotSpot issues that were resolved with this release.

See the release notes:

http://www.hp.com/products1/unix/java/java2/sdkrte/infolibrary/release_notes_SDK_1-2-2-09.html#Features of this Release

-Santosh

[Praveen Bezawada]

Hi
We had the problem of JVM crash with JVM1.2.2.07 and 1.2.2.05.
The problem was with the deprecated method 'stop', most of the time when stop was called it was causing a core dump. We changed the stop to interrupt, now it seems to be working fine.
Hope this helps.

...BPK...