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From "zhaoyunjiong (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-12667) Deadlock in AssignmentManager
Date Wed, 10 Dec 2014 08:24:12 GMT
zhaoyunjiong created HBASE-12667:
------------------------------------

             Summary: Deadlock in AssignmentManager
                 Key: HBASE-12667
                 URL: https://issues.apache.org/jira/browse/HBASE-12667
             Project: HBase
          Issue Type: Bug
          Components: master
    Affects Versions: 0.98.0
            Reporter: zhaoyunjiong


No order between regionPlans and regionStates caused dead lock.
Trunk don't have the problem since it's already got refactor.

"master:phxhshdc11en0004:60000":
        at org.apache.hadoop.hbase.master.AssignmentManager.clearRegionPlan(AssignmentManager.java:2898)
        - waiting to lock <0x000000048cefe520> (a java.util.TreeMap)
        at org.apache.hadoop.hbase.master.AssignmentManager.regionOnline(AssignmentManager.java:1286)
        at org.apache.hadoop.hbase.master.AssignmentManager.handleRegionSplitting(AssignmentManager.java:3552)
        - locked <0x000000048cf6fc10> (a org.apache.hadoop.hbase.master.RegionStates)
        at org.apache.hadoop.hbase.master.AssignmentManager.processRegionsInTransition(AssignmentManager.java:732)
        at org.apache.hadoop.hbase.master.AssignmentManager.processRegionInTransition(AssignmentManager.java:601)
        at org.apache.hadoop.hbase.master.AssignmentManager.processDeadServersAndRecoverLostRegions(AssignmentManager.java:2851)
        at org.apache.hadoop.hbase.master.AssignmentManager.processDeadServersAndRegionsInTransition(AssignmentManager.java:519)
        at org.apache.hadoop.hbase.master.AssignmentManager.joinCluster(AssignmentManager.java:459)
        at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:900)
        at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:609)
        at java.lang.Thread.run(Thread.java:744)
"AM.-pool1-t10":
        at org.apache.hadoop.hbase.master.RegionStates.getRegionAssignments(RegionStates.java:154)
        - waiting to lock <0x000000048cf6fc10> (a org.apache.hadoop.hbase.master.RegionStates)
        at org.apache.hadoop.hbase.master.AssignmentManager.getSnapShotOfAssignment(AssignmentManager.java:3610)
        at org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.getRegionAssignmentsByServer(BaseLoadBalancer.java:1146)
        at org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.createCluster(BaseLoadBalancer.java:959)
        at org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.randomAssignment(BaseLoadBalancer.java:1010)
        at org.apache.hadoop.hbase.master.AssignmentManager.getRegionPlan(AssignmentManager.java:2209)
        - locked <0x000000048cefe520> (a java.util.TreeMap)
        at org.apache.hadoop.hbase.master.AssignmentManager.getRegionPlan(AssignmentManager.java:2166)
        at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1886)
        at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1445)
        at org.apache.hadoop.hbase.master.AssignCallable.call(AssignCallable.java:45)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)




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