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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9863) Intermittently TestZooKeeper#testRegionAssignmentAfterMasterRecoveryDueToZKExpiry hangs
Date Fri, 01 Nov 2013 17:15:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13811464#comment-13811464
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stack commented on HBASE-9863:
------------------------------

Just to say I don't mind digging in deeper since this is fix to a flakey unit tests and fixing
these is important, hard work.

> Intermittently TestZooKeeper#testRegionAssignmentAfterMasterRecoveryDueToZKExpiry hangs
> ---------------------------------------------------------------------------------------
>
>                 Key: HBASE-9863
>                 URL: https://issues.apache.org/jira/browse/HBASE-9863
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>         Attachments: 9863-v1.txt
>
>
> TestZooKeeper#testRegionAssignmentAfterMasterRecoveryDueToZKExpiry sometimes hung.
> Here were two recent occurrences:
> https://builds.apache.org/job/PreCommit-HBASE-Build/7676/console
> https://builds.apache.org/job/PreCommit-HBASE-Build/7671/console
> There were 9 occurrences of the following in both stack traces:
> {code}
> "FifoRpcScheduler.handler1-thread-5" daemon prio=10 tid=0x09df8800 nid=0xc17 waiting
for monitor entry [0x6fdf8000]
>    java.lang.Thread.State: BLOCKED (on object monitor)
>   at org.apache.hadoop.hbase.master.TableNamespaceManager.isTableAvailableAndInitialized(TableNamespaceManager.java:250)
>   - waiting to lock <0x7f69b5f0> (a org.apache.hadoop.hbase.master.TableNamespaceManager)
>   at org.apache.hadoop.hbase.master.HMaster.isTableNamespaceManagerReady(HMaster.java:3146)
>   at org.apache.hadoop.hbase.master.HMaster.getNamespaceDescriptor(HMaster.java:3105)
>   at org.apache.hadoop.hbase.master.HMaster.createTable(HMaster.java:1743)
>   at org.apache.hadoop.hbase.master.HMaster.createTable(HMaster.java:1782)
>   at org.apache.hadoop.hbase.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java:38221)
>   at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:1983)
>   at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:92)
> {code}
> The test hung here:
> {code}
> "pool-1-thread-1" prio=10 tid=0x74f7b800 nid=0x5aa5 in Object.wait() [0x74efe000]
>    java.lang.Thread.State: TIMED_WAITING (on object monitor)
>   at java.lang.Object.wait(Native Method)
>   - waiting on <0xcc848348> (a org.apache.hadoop.hbase.ipc.RpcClient$Call)
>   at org.apache.hadoop.hbase.ipc.RpcClient.call(RpcClient.java:1436)
>   - locked <0xcc848348> (a org.apache.hadoop.hbase.ipc.RpcClient$Call)
>   at org.apache.hadoop.hbase.ipc.RpcClient.callBlockingMethod(RpcClient.java:1654)
>   at org.apache.hadoop.hbase.ipc.RpcClient$BlockingRpcChannelImplementation.callBlockingMethod(RpcClient.java:1712)
>   at org.apache.hadoop.hbase.protobuf.generated.MasterProtos$MasterService$BlockingStub.createTable(MasterProtos.java:40372)
>   at org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation$5.createTable(HConnectionManager.java:1931)
>   at org.apache.hadoop.hbase.client.HBaseAdmin$2.call(HBaseAdmin.java:598)
>   at org.apache.hadoop.hbase.client.HBaseAdmin$2.call(HBaseAdmin.java:594)
>   at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:116)
>   - locked <0x7faa26d0> (a org.apache.hadoop.hbase.client.RpcRetryingCaller)
>   at org.apache.hadoop.hbase.client.RpcRetryingCaller.callWithRetries(RpcRetryingCaller.java:94)
>   - locked <0x7faa26d0> (a org.apache.hadoop.hbase.client.RpcRetryingCaller)
>   at org.apache.hadoop.hbase.client.HBaseAdmin.executeCallable(HBaseAdmin.java:3124)
>   at org.apache.hadoop.hbase.client.HBaseAdmin.createTableAsync(HBaseAdmin.java:594)
>   at org.apache.hadoop.hbase.client.HBaseAdmin.createTable(HBaseAdmin.java:485)
>   at org.apache.hadoop.hbase.TestZooKeeper.testRegionAssignmentAfterMasterRecoveryDueToZKExpiry(TestZooKeeper.java:486)
> {code}



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