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From Xuan Li <xuan.drea...@gmail.com>
Subject High CPU usage on region server
Date Thu, 14 May 2015 18:18:20 GMT
I am seeing a wired issue on my hbase cluster: randomly, one or two region
servers in the cluster will have very high CPU utilization(close to 100%), even
these servers aren’t doing that much qps. Restart the region server will solve
it, but after a while the hot cpu usage problem will come back again on other
region servers.
I am running hbase 0.94.7, with a wide schema design(like couple hundreds
column). The cluster serves both read/write requests, with about 5K read/500K
Here is the jstack dump on high cpu usage region server: Preview image
[http://pastebin.com/UQr2FPze] RegionServer jstack [http://pastebin.com/UQr2FPze] ** Pastebin
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only! [http://pastebin.com/UQr2FPze] pastebin.com [http://pastebin.com/UQr2FPze] Mixmax [https://emailapps.mixmax.com/img/badge_mixmax.png]
Seems the cpu is busy with:

Any idea why it would be like this? Thanks!

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