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https://issues.apache.org/jira/browse/HBASE-9948?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13865858#comment-13865858
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Gustavo Anatoly commented on HBASE-9948:
----------------------------------------
Thanks, [~yuzhih...@gmail.com]
> 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, runtest.sh
>
>
> 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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