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From Matt Corgan <mcor...@hotpads.com>
Subject infinite loop of RS_ZK_REGION_SPLIT on .94.2
Date Sat, 03 Nov 2012 20:54:30 GMT
We upgraded from .94.0 to .94.2 last week and have started to encounter
infinite loops of region-transition on splits.  I'm not sure yet if it's
all splits nor if it's related to load.  Solution so far has been to
restart the regionserver process.

log snippet:

It's repeating these two lines:
2012-11-02 01:35:33,312 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x13ab46479832b76 Attempting to transition node
cf3e9bc069e1888983c06dc8e053ffcf from RS_ZK_REGION_SPLIT to
2012-11-02 01:35:33,364 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
regionserver:60020-0x13ab46479832b76 Successfully transitioned node
cf3e9bc069e1888983c06dc8e053ffcf from RS_ZK_REGION_SPLIT to

with the occasional:
2012-11-02 01:35:34,476 DEBUG
org.apache.hadoop.hbase.regionserver.SplitTransaction: Still waiting on the
master to process the split for cf3e9bc069e1888983c06dc8e053ffcf

Should the region transition from RS_ZK_REGION_SPLIT to itself?  It looks
wrong, but I'm not familiar with the code at all.


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