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From uamadman <uamadm...@gmail.com>
Subject Region Server Thread with a Single High Idle CPU
Date Mon, 15 Dec 2014 15:27:26 GMT
I've done a bit of digging and hope someone can shed some light on my
particular issue. One and Only One of my region servers after each restart
is randomly "Plagued" with a single maxed out CPU-Core and a Read Request
chart registering around 40k read requests per second. The remaining 13
dance around 2-5% and sit promptly at 0 reads per/s. Is this normal? And
Why?

Cluster Stats: 1 Master/14 Nodes Quad\Dual-Core 2.8-3.0Ghz 6-8gb ram each
with a single 500Gb Drive
Table Stats: ~150 Tables Total Split into 590 Regions 
1 table w/ 2.5Billion Rows 500 Columns
4 tables w/ 60-250 Million Rows 1000 Columns
~145 tables w/ 100K Rows 25 Columns

Standard-Key-Template: abcd123456

Versions:

CDH: 5.1.2-1.cdh5.1.2.p0.3

HBase Version: 0.98.1-cdh5.1.2, rUnknown

HBase Compiled: Mon Aug 25 19:33:59 PDT 2014, jenkins

Hadoop Version: 2.3.0-cdh5.1.2, r8e266e052e423af592871e2dfe09d54c03f6a0e8

Hadoop Compiled: 2014-08-26T01:36Z, jenkins

Cheers,
Jon



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