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: 2020-10-21 13:51:28,789 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 2020-10-21 13:52:24,761 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. Any ideas about this? Thanks.
