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https://issues.apache.org/jira/browse/HBASE-7878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13615364#comment-13615364
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Nicolas Liochon commented on HBASE-7878:
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bq. Another is through SplitLogWorker.
So when we have the distributed log on (the default) it's done by the region
server. Would it make sense to have it done by the master even before
distributing the tasks to the region servers: this way the NN would do the
recovery while we're distributing the tasks.
> recoverFileLease does not check return value of recoverLease
> ------------------------------------------------------------
>
> Key: HBASE-7878
> URL: https://issues.apache.org/jira/browse/HBASE-7878
> Project: HBase
> Issue Type: Bug
> Components: util
> Affects Versions: 0.95.0, 0.94.6
> Reporter: Eric Newton
> Assignee: Ted Yu
> Priority: Critical
> Fix For: 0.95.0, 0.98.0
>
> Attachments: 7878.94, 7878-94.addendum, 7878-94.addendum2,
> 7878-addendum.txt, 7878-trunk.addendum, 7878-trunk.addendum2,
> 7878-trunk-v10.txt, 7878-trunk-v11-test.txt, 7878-trunk-v12.txt,
> 7878-trunk-v13.txt, 7878-trunk-v14.txt, 7878-trunk-v15.patch,
> 7878-trunk-v16.txt, 7878-trunk-v2.txt, 7878-trunk-v3.txt, 7878-trunk-v4.txt,
> 7878-trunk-v5.txt, 7878-trunk-v6.txt, 7878-trunk-v7.txt, 7878-trunk-v8.txt,
> 7878-trunk-v9.txt, 7878-trunk-v9.txt
>
>
> I think this is a problem, so I'm opening a ticket so an HBase person takes a
> look.
> Apache Accumulo has moved its write-ahead log to HDFS. I modeled the lease
> recovery for Accumulo after HBase's lease recovery. During testing, we
> experienced data loss. I found it is necessary to wait until recoverLease
> returns true to know that the file has been truly closed. In FSHDFSUtils,
> the return result of recoverLease is not checked. In the unit tests created
> to check lease recovery in HBASE-2645, the return result of recoverLease is
> always checked.
> I think FSHDFSUtils should be modified to check the return result, and wait
> until it returns true.
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