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https://issues.apache.org/jira/browse/HBASE-25225?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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lixiaobao reassigned HBASE-25225:
---------------------------------
Assignee: lixiaobao
> Create table very slowly if there are multi regions
> ---------------------------------------------------
>
> Key: HBASE-25225
> URL: https://issues.apache.org/jira/browse/HBASE-25225
> Project: HBase
> Issue Type: Bug
> Affects Versions: 2.2.6
> Reporter: Guanghao Zhang
> Assignee: lixiaobao
> Priority: Blocker
>
> Run the same UT TestRegionReplicaFailover on my local PC, mvn clean test
> -Dtest=TestRegionReplicaFailover, branch-2.2 takes 8 mins but branch-2.3 only
> needs 2 mins.
>
> I found the problem is related to procedure schedule. See the below log:
> 2020-10-21 13:52:28,097 INFO [PEWorker-1]
> procedure2.ProcedureExecutor(1427): Finished pid=296, ppid=45, state=SUCCESS;
> org.apache.hadoop.hbase.master.assignment.OpenRegionProcedure in 1.6250sec
> 2020-10-21 13:52:28,538 INFO [PEWorker-3]
> procedure2.ProcedureExecutor(1427): Finished pid=45, ppid=20, state=SUCCESS;
> TransitRegionStateProcedure table=testLotsOfRegionRepli2,
> region=50703895da3cb8c942d3197600d549bc, ASSIGN in 59.4330sec
>
> The real assign procedure only cost 1.6 seconds but the
> TransitRegionStateProcedure cost 59.4 seconds. The pid=45 procedure was
> initialized at 2020-10-21 13:51:28,666. It was added to TableQueue at
> 2020-10-21 13:51:28,789. But took xlock to run at 2020-10-21 13:52:24,761.
> See the below log:
> {color:#ff0000}2020-10-21 13:51:28,789{color} DEBUG [PEWorker-4]
> procedure.MasterProcedureScheduler(352): Add
> TableQueue(testLotsOfRegionRepli2, xlock=true (20) sharedLock=0 size=25) to
> run queue because: pid=45, ppid=20,
> state=RUNNABLE:REGION_STATE_TRANSITION_GET_ASSIGN_CANDIDATE;
> TransitRegionStateProcedure table=testLotsOfRegionRepli2,
> region=50703895da3cb8c942d3197600d549bc, ASSIGN has the excusive lock access
> {color:#ff0000}2020-10-21 13:52:24,761{color} INFO [PEWorker-2]
> procedure.MasterProcedureScheduler(737): Took xlock for pid=45, ppid=20,
> state=RUNNABLE:REGION_STATE_TRANSITION_GET_ASSIGN_CANDIDATE;
> TransitRegionStateProcedure table=testLotsOfRegionRepli2,
> region=50703895da3cb8c942d3197600d549bc, ASSIGN
>
> But when I tried this UT on another PC, it only cost 2 mins, which is the
> same with branch-2.3. It is weird.
>
> Marked this as blocker for release 2.2.7.
>
> If you are interested for this, please run "mvn clean test
> -Dtest=TestRegionReplicaFailover" and comment the cost time here. Thanks.
>
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