stack created HBASE-15207:
-----------------------------
Summary: Stuck balancer; logging ten lines a millisecond
Key: HBASE-15207
URL: https://issues.apache.org/jira/browse/HBASE-15207
Project: HBase
Issue Type: Bug
Components: Balancer
Affects Versions: 1.2.0
Reporter: stack
Last night my logs filled with this (10x256MB log files):
....
2016-02-01 11:25:26,958 DEBUG [B.defaultRpcServer.handler=9,queue=0,port=16000]
balancer.BaseLoadBalancer: Lowest locality region server with non zero regions
is ve0542.halxg.cloudera.com with locality 0.0
2016-02-01 11:25:26,958 DEBUG [B.defaultRpcServer.handler=9,queue=0,port=16000]
balancer.BaseLoadBalancer: Lowest locality region index is 0 and its region
server contains 1 regions
...
Added by this:
commit 54028140f4f19a6af81c8c8f29dda0c52491a0c9
Author: tedyu <[email protected]>
Date: Thu Aug 13 09:11:59 2015 -0700
HBASE-13376 Improvements to Stochastic load balancer (Vandana
Ayyalasomayajula)
Looks like balancer got stuck. Logging at ten lines a millisecond.
Here is lead up. Nothing in particular jumps out. Rerun doesn't show this.
{code}
2016-01-28 05:56:22,572 DEBUG
[ve0524.halxg.cloudera.com,16000,1453988766013_ChoreService_1]
balancer.BaseLoadBalancer: Server ve0526.halxg.cloudera.com had 0 regions.
2016-01-28 05:56:22,572 DEBUG
[ve0524.halxg.cloudera.com,16000,1453988766013_ChoreService_1]
balancer.BaseLoadBalancer: Server ve0532.halxg.cloudera.com had 0 regions.
2016-01-28 05:56:22,572 DEBUG
[ve0524.halxg.cloudera.com,16000,1453988766013_ChoreService_1]
balancer.BaseLoadBalancer: Server ve0538.halxg.cloudera.com had 0 regions.
2016-01-28 05:56:22,572 DEBUG
[ve0524.halxg.cloudera.com,16000,1453988766013_ChoreService_1]
balancer.BaseLoadBalancer: Lowest locality region server with non zero regions
is ve0540.halxg.cloudera.com with locality 0.0
2016-01-28 05:56:22,572 DEBUG
[ve0524.halxg.cloudera.com,16000,1453988766013_ChoreService_1]
balancer.BaseLoadBalancer: Lowest locality region index is 0 and its region
server contains 1 regions
2016-01-28 05:56:22,573 DEBUG
[ve0524.halxg.cloudera.com,16000,1453988766013_ChoreService_1]
balancer.BaseLoadBalancer: Server ve0526.halxg.cloudera.com had 0 regions.
2016-01-28 05:56:22,573 DEBUG
[ve0524.halxg.cloudera.com,16000,1453988766013_ChoreService_1]
balancer.BaseLoadBalancer: Server ve0532.halxg.cloudera.com had 0 regions.
2016-01-28 05:56:22,573 DEBUG
[ve0524.halxg.cloudera.com,16000,1453988766013_ChoreService_1]
balancer.BaseLoadBalancer: Server ve0538.halxg.cloudera.com had 0 regions.
2016-01-28 05:56:22,573 DEBUG
[ve0524.halxg.cloudera.com,16000,1453988766013_ChoreService_1]
balancer.BaseLoadBalancer: Lowest locality region server with non zero regions
is ve0540.halxg.cloudera.com with locality 0.0
2016-01-28 05:56:22,573 DEBUG
[ve0524.halxg.cloudera.com,16000,1453988766013_ChoreService_1]
balancer.BaseLoadBalancer: Lowest locality region index is 0 and its region
server contains 1 regions
2016-01-28 05:56:22,573 DEBUG
[ve0524.halxg.cloudera.com,16000,1453988766013_ChoreService_1]
balancer.BaseLoadBalancer: Server ve0526.halxg.cloudera.com had 0 regions.
2016-01-28 05:56:22,573 DEBUG
[ve0524.halxg.cloudera.com,16000,1453988766013_ChoreService_1]
balancer.BaseLoadBalancer: Server ve0532.halxg.cloudera.com had 0 regions.
2016-01-28 05:56:22,573 DEBUG
[ve0524.halxg.cloudera.com,16000,1453988766013_ChoreService_1]
balancer.BaseLoadBalancer: Server ve0538.halxg.cloudera.com had 0 regions.
....
{code}
Nothing else is happening on this master
Happens just after a Master joins cluster after being killed by a monkey.
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