Andrew Purtell created HBASE-16676:
Summary: All RPC requests serviced by PriorityRpcServer in some
deploys after HBASE-13375
Issue Type: Bug
Affects Versions: 1.2.3, 1.2.2, 1.2.1, 1.2.0, 2.0.0, 1.3.0, 1.4.0
Reporter: Andrew Purtell
I have been trying to track down why 1.2.x won't sometimes pass a 1 billion row
ITBLL run while 0.98.22 and 1.1.6 will always, and a defeat of RPC
prioritization could explain it. We get stuck during the loading phase and the
loader job eventually fails.
All testing is done in an insecure environment under the same UNIX user
(clusterdock) so effectively all ops are issued by the superuser.
Doing unrelated work - or so I thought! - I was looking at object allocations
by YCSB workload by thread and when looking at the RegionServer RPC threads
noticed that for 0.98.22 and 1.1.6, as expected, the vast majority of
allocations are from threads named "B.defaultRpcServer.handler*". In 1.2.0 and
up, instead the vast majority are from threads named
"PriorityRpcServer.handler*" with very little from threads named
"B.defaultRpcServer.handler*". A git bisect to find the change that causes
this leads to HBASE-13375, and so of course this makes sense out of what I am
seeing, but is this really what we want? What about production environments
(insecure and degenerate secure) where all ops are effectively issued by the
superuser? We run one of these at Salesforce.
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