bharath v created HBASE-11405:
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Summary: Multiple invocations of hbck in parallel disables
balancer permanently
Key: HBASE-11405
URL: https://issues.apache.org/jira/browse/HBASE-11405
Project: HBase
Issue Type: Bug
Components: Balancer, hbck
Affects Versions: 0.99.0
Reporter: bharath v
This is because of the following piece of code in hbck
{code:borderStyle=solid}
boolean oldBalancer = admin.setBalancerRunning(false, true);
try {
onlineConsistencyRepair();
}
finally {
admin.setBalancerRunning(oldBalancer, false);
}
{code}
Newer invocations set oldBalancer to false as it was disabled by previous
invocations and this disables balancer permanently unless its manually turned
on by the user. Easy to reproduce, just run hbck 100 times in a loop in 2
different sessions and you can see that balancer is set to false in the HMaster
logs.
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