OpenJDK breaks on processWorkerExit with no breakpoint

I'm running tomcat 7.0.21 on OpenJDK

java version "1.6.0_20"
OpenJDK Runtime Environment (IcedTea6 1.9.9) (6b20-1.9.9-0ubuntu1~10.10.2)
OpenJDK 64-Bit Server VM (build 19.0-b09, mixed mode)

in debug mode via Eclipse.开发者_开发知识库

Periodically after serving an arbitrary number of requests, OpenJDK starts to break at:

At this point there is very little stack left, usually:

and very little to go on as far as what might have cause the issue...

Anyone have any insight on what might be happening?

In debug mode in eclipse by default, break on uncaught exceptions is checked. Since you don't have a catch method here, it's likely that an uncaught exception is being thrown and the debugger is breaking for you immediately before the exception is thrown. You can turn it off in preferences under Java->Debug.

Spot on, still relevant in 2015 with latest Eclipse too. Make sure to keep the check-box under green highlight circle to be unchecked. I am adding image to highlight the change