Peeyush Gupta created ASTERIXDB-3400:
----------------------------------------

             Summary: Possible deadlock in GlobalVirtualBufferCache
                 Key: ASTERIXDB-3400
                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-3400
             Project: Apache AsterixDB
          Issue Type: Bug
          Components: IDX - Indexes
            Reporter: Peeyush Gupta


There is a possibility of deadlock while dropping and index and flush operation 
are happening simultaneously. Following show the deadlocked threads stack trace


{noformat}
"Executor-2784:622b93ec1479bc98eaffbc87b93ca050" [tid=3270 state=BLOCKED 
lock=org.apache.asterix.common.context.PrimaryIndexOperationTracker@2f1ba30a 
lockOwner="SAO:JID:0.807:TAID:TID:ANID:ODID:0:0:39:0" (tid=3314]  at 
app//org.apache.asterix.common.context.GlobalVirtualBufferCache.flushed(GlobalVirtualBufferCache.java:184)
   - <locked 
org.apache.asterix.common.context.GlobalVirtualBufferCache@7af81de2>  at 
app//org.apache.hyracks.storage.am.lsm.common.impls.AbstractLSMMemoryComponent.flushed(AbstractLSMMemoryComponent.java:349)
  at 
app//org.apache.hyracks.storage.am.lsm.common.impls.LSMHarness.doExitComponents(LSMHarness.java:284)
 at 
app//org.apache.hyracks.storage.am.lsm.common.impls.LSMHarness.exitComponents(LSMHarness.java:360)
   at 
app//org.apache.hyracks.storage.am.lsm.common.impls.LSMHarness.flush(LSMHarness.java:540)
    at 
app//org.apache.hyracks.storage.am.lsm.common.impls.LSMTreeIndexAccessor.flush(LSMTreeIndexAccessor.java:123)
        at 
app//org.apache.hyracks.storage.am.lsm.common.impls.FlushOperation.call(FlushOperation.java:38)
      at 
app//org.apache.hyracks.storage.am.lsm.common.impls.FlushOperation.call(FlushOperation.java:29)
      at 
[email protected]/java.util.concurrent.FutureTask.run(FutureTask.java:264)   at 
[email protected]/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
    at 
[email protected]/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at [email protected]/java.lang.Thread.run(Thread.java:840)

"SAO:JID:0.807:TAID:TID:ANID:ODID:0:0:39:0" [tid=3314 state=BLOCKED 
lock=org.apache.asterix.common.context.GlobalVirtualBufferCache@7af81de2 
lockOwner="Executor-2784:622b93ec1479bc98eaffbc87b93ca050" (tid=3270]      at 
app//org.apache.asterix.common.context.GlobalVirtualBufferCache.unregister(GlobalVirtualBufferCache.java:143)
        at 
app//org.apache.hyracks.storage.am.lsm.common.impls.AbstractLSMMemoryComponent.deallocate(AbstractLSMMemoryComponent.java:308)
       at 
app//org.apache.hyracks.storage.am.lsm.common.impls.AbstractLSMIndex.deallocateMemoryComponents(AbstractLSMIndex.java:264)
   at 
app//org.apache.hyracks.storage.am.lsm.common.impls.AbstractLSMIndex.deactivate(AbstractLSMIndex.java:244)
   - <locked 
org.apache.hyracks.storage.am.lsm.btree.column.impls.lsm.LSMColumnBTree@6f64ebfe>
     at 
app//org.apache.asterix.common.context.DatasetLifecycleManager.closeIndex(DatasetLifecycleManager.java:631)
  - <locked 
org.apache.asterix.common.context.PrimaryIndexOperationTracker@2f1ba30a>      
at 
app//org.apache.asterix.common.context.DatasetLifecycleManager.unregister(DatasetLifecycleManager.java:171)
  - <locked org.apache.asterix.common.context.DatasetLifecycleManager@3e63567b> 
  at 
app//org.apache.hyracks.storage.am.common.dataflow.IndexDataflowHelper.destroy(IndexDataflowHelper.java:96)
  - <locked org.apache.asterix.common.context.DatasetLifecycleManager@3e63567b> 
  at 
app//org.apache.hyracks.storage.am.common.dataflow.IndexDropOperatorNodePushable.dropIndex(IndexDropOperatorNodePushable.java:90)
    at 
app//org.apache.hyracks.storage.am.common.dataflow.IndexDropOperatorNodePushable.initialize(IndexDropOperatorNodePushable.java:78)
   at 
app//org.apache.hyracks.api.rewriter.runtime.SuperActivityOperatorNodePushable$$Lambda$1682/0x0000000800943f20.run(Unknown
 Source)   at 
app//org.apache.hyracks.api.rewriter.runtime.SuperActivityOperatorNodePushable.lambda$runInParallel$0(SuperActivityOperatorNodePushable.java:233)
    at 
app//org.apache.hyracks.api.rewriter.runtime.SuperActivityOperatorNodePushable$$Lambda$1686/0x00000008009449c8.call(Unknown
 Source)  at 
[email protected]/java.util.concurrent.FutureTask.run(FutureTask.java:264)   at 
[email protected]/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
    at 
[email protected]/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at [email protected]/java.lang.Thread.run(Thread.java:840){noformat}



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