On Mon, Jul 8, 2013 at 12:22 PM, Viral Bajaria <viral.baja...@gmail.com>wrote:
> - I tried taking a stack trace using jstack but after the dump it crashed > the regionserver. I also did not take the dump on the offending > regionserver, rather took it on the regionservers that were making the > block count. I will take a stack trace on the offending server. Is there > any other tool besides jstack ? I don't want to crash my regionserver. > jstack crashing the JVM is concerning but maybe off topic. As an alternative you can poll the regionserver for a stack dump on its infoport, e.g. http://<host>:60010/stacks but unless the behavior you see is the _same_ regionserver asking for the _same_ block many times consecutively, it's probably workload related. > To answer Vladimir's points: > - Data access pattern definitely turns out to be uniform over a period of > time. > - I just did a sweep of my code base and found that there are a few places > where Scanner are using block cache. I will disable that and see how it > goes. > Please let us know how it goes. -- Best regards, - Andy Problems worthy of attack prove their worth by hitting back. - Piet Hein (via Tom White)
