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https://issues.apache.org/jira/browse/HBASE-15549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15219097#comment-15219097
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stack commented on HBASE-15549:
-------------------------------
Balancer gets messed up if master is not carrying regions:
{code}
hbase(main):008:0* balancer force
NameError: undefined local variable or method `force' for #<Object:0x3d620a1>
hbase(main):009:0> balancer 'force'
ERROR: java.io.IOException: 6
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2285)
at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:109)
at
org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:137)
at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:112)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ArrayIndexOutOfBoundsException: 6
at
org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer$Cluster.getLocalityOfRegion(BaseLoadBalancer.java:869)
at
org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer$LocalityCostFunction.cost(StochasticLoadBalancer.java:1186)
at
org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.computeCost(StochasticLoadBalancer.java:521)
at
org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.balanceCluster(StochasticLoadBalancer.java:335)
at
org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.balanceCluster(StochasticLoadBalancer.java:264)
at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1276)
at
org.apache.hadoop.hbase.master.MasterRpcServices.balance(MasterRpcServices.java:352)
at
org.apache.hadoop.hbase.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java:60465)
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2240)
... 4 more
{code}
This is w/ my setting tables for master to 'none' (which makes for some nice
stack traces in logs complaining about no such table 'none')
> Undo HMaster carrying regions in master branch as default
> ---------------------------------------------------------
>
> Key: HBASE-15549
> URL: https://issues.apache.org/jira/browse/HBASE-15549
> Project: HBase
> Issue Type: Bug
> Components: Balancer, master
> Reporter: stack
> Attachments: 15549.patch
>
>
> I thought we had an issue to do this but I can't find it so here is a new one.
> Currently, in master branch, HMaster is a RegionServer and carries meta
> regions such as hbase:meta. Disable this facility by default until better
> thought through (I think we should undo master ever carrying regions; FBers
> are thinking we should go forward with notion that master carries meta/system
> regions. TODO). I want to disable it because this facility is not finished
> and meantime I want to test new stuff coming in on master branch w/o this new
> feature getting in the way.
> Parking here a patch that has how to disable master carrying regions and a
> probably redundant test that ensures all works when master is not carrying
> meta regions (added because it WASN'T working for me -- but was pilot error).
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