Description
I've reproduced this problem consistently on a 20 node cluster.
The first run fails on a node (jon-snaphots-2 in this case) to take snapshot due to a NotServingRegionException (this is acceptable)
2013-01-23 13:32:48,631 DEBUG org.apache.hadoop.hbase.errorhandling.ForeignExceptionDispatcher: accepting received exception org.apache.hadoop.hbase.errorhandling.ForeignException$ProxyThrowable via jon-snapshots-2.ent.cloudera.com,22101,1358976524369:org.apache.hadoop.hbase.errorhandling.ForeignException$ProxyThrowable: org.apache.hadoop.hbase.NotServingRegionException: TestTable,0002493652,1358976652443.b858147ad87a7812ac9a73dd8fef36ad. is closing at org.apache.hadoop.hbase.errorhandling.ForeignException.deserialize(ForeignException.java:184) at org.apache.hadoop.hbase.procedure.ZKProcedureCoordinatorRpcs.abort(ZKProcedureCoordinatorRpcs.java:240) at org.apache.hadoop.hbase.procedure.ZKProcedureCoordinatorRpcs$1.nodeCreated(ZKProcedureCoordinatorRpcs.java:182) at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:294) at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:519) at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495) Caused by: org.apache.hadoop.hbase.errorhandling.ForeignException$ProxyThrowable: org.apache.hadoop.hbase.NotServingRegionException: TestTable,0002493652,1358976652443.b858147ad87a7812ac9a73dd8fef36ad. is closing at org.apache.hadoop.hbase.regionserver.snapshot.RegionServerSnapshotManager$SnapshotSubprocedurePool.waitForOutstandingTasks(RegionServerSnapshotManager.java:343) at org.apache.hadoop.hbase.regionserver.snapshot.FlushSnapshotSubprocedure.flushSnapshot(FlushSnapshotSubprocedure.java:107) at org.apache.hadoop.hbase.regionserver.snapshot.FlushSnapshotSubprocedure.insideBarrier(FlushSnapshotSubprocedure.java:123) at org.apache.hadoop.hbase.procedure.Subprocedure.call(Subprocedure.java:181) at org.apache.hadoop.hbase.procedure.Subprocedure.call(Subprocedure.java:52) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) 2013-01-23 13:32:48,631 DEBUG org.apache.hadoop.hbase.errorhandling.ForeignExceptionDispatcher: Recieved error, notifying listeners... 2013-01-23 13:32:48,730 ERROR org.apache.hadoop.hbase.procedure.Procedure: Procedure 'pe-6' execution failed! org.apache.hadoop.hbase.errorhandling.ForeignException$ProxyThrowable via jon-snapshots-2.ent.cloudera.com,22101,1358976524369:org.apache.hadoop.hbase.errorhandling.ForeignException$ProxyThrowable: org.apache.hadoop.hbase.NotServingRegionException: TestTable,0002493652,1358976652443.b858147ad87a7812ac9a73dd8fef36ad. is closing at org.apache.hadoop.hbase.errorhandling.ForeignExceptionDispatcher.rethrowException(ForeignExceptionDispatcher.java:84) at org.apache.hadoop.hbase.procedure.Procedure.waitForLatch(Procedure.java:357) at org.apache.hadoop.hbase.procedure.Procedure.call(Procedure.java:203) at org.apache.hadoop.hbase.procedure.Procedure.call(Procedure.java:68) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) Caused by: org.apache.hadoop.hbase.errorhandling.ForeignException$ProxyThrowable: org.apache.hadoop.hbase.NotServingRegionException: TestTable,0002493652,1358976652443.b858147ad87a7812ac9a73dd8fef36ad. is closing at org.apache.hadoop.hbase.regionserver.snapshot.RegionServerSnapshotManager$SnapshotSubprocedurePool.waitForOutstandingTasks(RegionServerSnapshotManager.java:343) at org.apache.hadoop.hbase.regionserver.snapshot.FlushSnapshotSubprocedure.flushSnapshot(FlushSnapshotSubprocedure.java:107) at org.apache.hadoop.hbase.regionserver.snapshot.FlushSnapshotSubprocedure.insideBarrier(FlushSnapshotSubprocedure.java:123) at org.apache.hadoop.hbase.procedure.Subprocedure.call(Subprocedure.java:181) at org.apache.hadoop.hbase.procedure.Subprocedure.call(Subprocedure.java:52) ... 5 more
Subsequent snapshot attempts that require jon-snapshot-2 to participate fail like this:
org.apache.hadoop.hbase.errorhandling.ForeignException$ProxyThrowable via jon-snapshots-2.ent.cloudera.com,22101,1358976524369:org.apache.hadoop.hbase.errorhandling.ForeignException$ProxyThrowable: java.util.concurrent.CancellationException at org.apache.hadoop.hbase.errorhandling.ForeignException.deserialize(ForeignException.java:184) at org.apache.hadoop.hbase.procedure.ZKProcedureCoordinatorRpcs.abort(ZKProcedureCoordinatorRpcs.java:240) at org.apache.hadoop.hbase.procedure.ZKProcedureCoordinatorRpcs$1.nodeCreated(ZKProcedureCoordinatorRpcs.java:182) at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:294) at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:519) at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495) Caused by: org.apache.hadoop.hbase.errorhandling.ForeignException$ProxyThrowable: java.util.concurrent.CancellationException at org.apache.hadoop.hbase.procedure.Subprocedure.cancel(Subprocedure.java:270) at org.apache.hadoop.hbase.procedure.Subprocedure.call(Subprocedure.java:202) at org.apache.hadoop.hbase.procedure.Subprocedure.call(Subprocedure.java:52) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) 2013-01-23 13:32:59,557 DEBUG org.apache.hadoop.hbase.errorhandling.ForeignExceptionDispatcher: Recieved error, notifying listeners... 2013-01-23 13:32:59,810 ERROR org.apache.hadoop.hbase.procedure.Procedure: Procedure 'pe-7' execution failed! org.apache.hadoop.hbase.errorhandling.ForeignException$ProxyThrowable via jon-snapshots-2.ent.cloudera.com,22101,1358976524369:org.apache.hadoop.hbase.errorhandling.ForeignException$ProxyThrowable: java.util.concurrent.CancellationException at org.apache.hadoop.hbase.errorhandling.ForeignExceptionDispatcher.rethrowException(ForeignExceptionDispatcher.java:84) at org.apache.hadoop.hbase.procedure.Procedure.waitForLatch(Procedure.java:357) at org.apache.hadoop.hbase.procedure.Procedure.call(Procedure.java:203) at org.apache.hadoop.hbase.procedure.Procedure.call(Procedure.java:68) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303) at java.util.concurrent.FutureTask.run(FutureTask.java:138) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) Caused by: org.apache.hadoop.hbase.errorhandling.ForeignException$ProxyThrowable: java.util.concurrent.CancellationException at org.apache.hadoop.hbase.procedure.Subprocedure.cancel(Subprocedure.java:270) at org.apache.hadoop.hbase.procedure.Subprocedure.call(Subprocedure.java:202) at org.apache.hadoop.hbase.procedure.Subprocedure.call(Subprocedure.java:52) ... 5 more