Java HotSpot Virtual Machine

Hi,

I've been experiencing a lot of crashes of the Sun JVM on both Ubuntu Server 10.04.1 and 10.04.2. The crashes seem to happening at random intervals. Sometimes they occur when the server is stressed, other times when there is no load on the server at all.

I'm running a host with four virtual machines using KVM as the virtualisation technology. Each of the guests is configured to have 1 gigabyte of memory.

The host:

law@gandalf:~$ uname -a Linux gandalf 2.6.32-27-server #49-Ubuntu SMP Thu Dec 2 02:05:21 UTC 2010 x86_64 GNU/Linux

And each guest:

confluence@lw-confluence:~$ uname -a Linux lw-confluence 2.6.32-24-server #43-Ubuntu SMP Thu Sep 16 16:05:42 UTC 2010 x86_64 GNU/Linux

On 3 of the guests I am running an instance of Tomcat with a single application. I am running:

1 instance of Atlassian Jira
1 instance of Atlassian Confluence
1 instance of Magnolia CMS
I have experienced random crashes of the JVM across all three machines. I have experienced these crashes in JVM versions 1.6.0_22 (64 bit), 1.6.0_24 (64 bit) and 1.6.0_24 (32 bit).

The crash seems to be consistently occurring within a native call to libjvm.so. I believe that it is happening when the JVM requests garbage collection, but I'm not fully sure of this. I have a sample of some of the crash dumps:

On the guest running Confluence:

http://pastebin.com/BaC9yddr

On the guest running Jira:

http://pastebin.com/hfC0m9sv

I have tried the following thus far:

Re-installing the JVM
Updating the JVM from 1.6.0_22 to 1.6.0_24
Using a 32-bit JVM instead of the 64 bit version

I'm at a bit of a loss as to what to try next, so any help would be greatly appreciated.