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From Christian Schäfer <syrious3...@hotmail.de>
Subject Key Region is not moved to alternative RegionServer on RegionServer shutoff
Date Thu, 12 Jan 2012 11:30:14 GMT


I currently perform some tests that measure put/second performance.

Created a pre-splitted table to spread load like this:

create 'myTable', 'Family1', {SPLITS => ['111111.00000.0000000000000', '222222.00000.0000000000000',
'333333.00000.0000000000000', '444444.00000.0000000000000']}

Due to this 4 limits there are 5 regions each assigned to one region server.

Referring to the stats from HMaster the load was spread.

Now I just wanted to proof fault tolerance by shutting of one region server while running
puts on all region servers.

BUT: after region server shutdown I wondered that the key region is not moved to any alternative
region server but is simply no more there.
This way always my puts are blocked  -> grinding halt of the system

Logs of HMaster is clean.
HMaster is generally able to move regions as I noticed when HMaster's Heap Size was set too

Has anyone an advice?
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