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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9948) HMaster should handle duplicate log split requests
Date Wed, 08 Jan 2014 20:26:51 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13865851#comment-13865851
] 

Ted Yu commented on HBASE-9948:
-------------------------------

Let me search my computer to see if I have the test output.

Meanwhile, you can loop TestRestartCluster and see if the duplicate message appears in test
output.

Thanks

> HMaster should handle duplicate log split requests
> --------------------------------------------------
>
>                 Key: HBASE-9948
>                 URL: https://issues.apache.org/jira/browse/HBASE-9948
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>            Assignee: Gustavo Anatoly
>         Attachments: HBASE-9948-v2.patch, HBASE-9948.patch
>
>
> I saw the following in test output for TestRestartCluster:
> {code}
> 2013-11-11 19:59:55,538 DEBUG [M:0;kiyo:36213] master.SplitLogManager(327): Scheduling
batch of logs to split
> 2013-11-11 19:59:55,538 INFO  [M:0;kiyo:36213] master.SplitLogManager(329): started splitting
1 logs in [hdfs://localhost:46376/user/hortonzy/hbase/WALs/kk,44962,1384199990193-splitting]
> 2013-11-11 19:59:55,538 WARN  [M:0;kiyo:36213] master.SplitLogManager(1048): Failure
because two threads can't wait for the same task; path=/hbase/splitWAL/WALs%2Fkk%2C44962%2C1384199990193-splitting%2Fkk%252C44962%252C1384199990193.1384199993702.meta
> 2013-11-11 19:59:55,538 FATAL [M:0;kiyo:36213] master.HMaster(2188): Master server abort:
loaded coprocessors are: [org.apache.hadoop.hbase.coprocessor.MultiRowMutationEndpoint]
> 2013-11-11 19:59:55,538 FATAL [M:0;kiyo:36213] master.HMaster(2193): Unhandled exception.
Starting shutdown.
> java.io.IOException: duplicate log split scheduled for hdfs://localhost:46376/user/hortonzy/hbase/WALs/kk,44962,1384199990193-splitting/kk%2C44962%2C1384199990193.1384199993702.meta
>         at org.apache.hadoop.hbase.master.SplitLogManager.splitLogDistributed(SplitLogManager.java:343)
>         at org.apache.hadoop.hbase.master.MasterFileSystem.splitLog(MasterFileSystem.java:409)
>         at org.apache.hadoop.hbase.master.MasterFileSystem.splitMetaLog(MasterFileSystem.java:301)
>         at org.apache.hadoop.hbase.master.MasterFileSystem.splitMetaLog(MasterFileSystem.java:292)
>         at org.apache.hadoop.hbase.master.HMaster.assignMeta(HMaster.java:1038)
>         at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:868)
>         at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:605)
>         at java.lang.Thread.run(Thread.java:724)
> 2013-11-11 19:59:55,539 INFO  [M:0;kiyo:36213] master.HMaster(2386): Aborting
> 2013-11-11 19:59:55,539 DEBUG [M:0;kiyo:36213] master.HMaster(1234): Stopping service
threads
> {code}
> HMaster should handle duplicate log split requests, instead of aborting.



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