Guanghao Zhang created HBASE-19965:
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Summary: Fix flaky TestAsyncRegionAdminApi
Key: HBASE-19965
URL: https://issues.apache.org/jira/browse/HBASE-19965
Project: HBase
Issue Type: Sub-task
Reporter: Guanghao Zhang
See
[https://builds.apache.org/job/HBase%20Nightly/job/branch-2/284/testReport/junit/org.apache.hadoop.hbase.client/TestAsyncRegionAdminApi/testMergeRegions_0_/]
java.lang.AssertionError: expected:<2> but was:<3> at
org.apache.hadoop.hbase.client.TestAsyncRegionAdminApi.testMergeRegions(TestAsyncRegionAdminApi.java:359)
Merge regions not work. The table still have 3 regions after the
MergeRegionsProcedure finished.
The master start balance region 9e2773ba1efba79a2defa276e9a26ed4. But because
the MergeRegionsProcedure pid=138 start work first, so the balance need wait
for the lock. But after merge regions finished, the MoveRegionProcedure pid=139
start work and assign 9e2773ba1efba79a2defa276e9a26ed4 to a new region server.
This is not right. The MoveRegionProcedure should skip to assign a region which
was marked as offline. Or we should clear the merged regions' procedure when
MergeRegionsProcedure finished.
Logs:
2018-02-08 16:24:44,608 INFO [master/cd4730e3eae2:0.Chore.1]
master.HMaster(1454): balance
hri=testMergeRegions,,1518107079782.9e2773ba1efba79a2defa276e9a26ed4.,
source=cd4730e3eae2,39077,1518106776411,
destination=cd4730e3eae2,40578,1518106776318 2018-02-08 16:24:44,608 DEBUG
[RpcServer.default.FPBQ.Fifo.handler=4,queue=0,port=37885]
procedure2.ProcedureExecutor(868): Stored pid=138,
state=RUNNABLE:MERGE_TABLE_REGIONS_PREPARE;
MergeTableRegionsProcedure table=testMergeRegions,
regions=[9e2773ba1efba79a2defa276e9a26ed4, 8f8fd5cd032313e1aadb83e31e1b7479],
forcibly=false
......
2018-02-08 16:24:50,111 INFO [PEWorker-13] procedure2.ProcedureExecutor(1249):
Finished pid=138, state=SUCCESS; MergeTableRegionsProcedure
table=testMergeRegions, regions=[9e2773ba1efba79a2defa276e9a26ed4,
8f8fd5cd032313e1aadb83e31e1b7479], forcibly=false in 5.5710sec 2018-02-08
16:24:50,113 INFO [PEWorker-13] procedure.MasterProcedureScheduler(813):
pid=139, state=RUNNABLE:MOVE_REGION_UNASSIGN; MoveRegionProcedure
hri=testMergeRegions,,1518107079782.9e2773ba1efba79a2defa276e9a26ed4.,
source=cd4730e3eae2,39077,1518106776411,
destination=cd4730e3eae2,40578,1518106776318 testMergeRegions
testMergeRegions,,1518107079782.9e2773ba1efba79a2defa276e9a26ed4.
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