Customer is encountering a hang with a JBoss application running 1.5.0_07 and 1.5.0_12 on RHEL AS 4 Update 5.

When the hang occurs, java will not respond to kill -3 and the customer is unable to attach j* commands (such as jstack) to the process.

I have included the JVM flags in the comments of this bug.  The customer has gcored the hung java process and provided a pstack (attached) of the hang.  I have also had the customer try running several pstacks of the live process (pstack1, pstack2, and pstack3) which are attached.  We see no movement of the process at all from the pstacks of the live process.

The customer also notices Eden is 100% full around the time of the hang.  A couple of GC logs have been collected with -verbose:gc, -XX:+PrintGCTimeStamps, and -XX:+PrintGCDetails which are also attached to this report.

I've had the customer try running with -client and they encounter a crash.  I've attached an hs_err log from this crash.