I was able to reproduce the same regionserver asking for the same local block over 300 times within the same 2 minute window by running one of my heavy workloads.
Let me try and gather some stack dumps. I agree that jstack crashing the jvm is concerning but there is nothing in the errors to know why it happened. I will keep that conversation out of here. As an addendum, I am using asynchbase as my client. Not sure if the arrival of multiple requests for rowkeys that could be in the same non-cached block causes hbase to queue up a non-cached block read via SCR and since the box is under load, it queues up multiple of these and makes the problem worse. Thanks, Viral On Mon, Jul 8, 2013 at 3:53 PM, Andrew Purtell <apurt...@apache.org> wrote: > but unless the behavior you see is the _same_ regionserver asking for the > _same_ block many times consecutively, it's probably workload related. >
