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https://issues.apache.org/jira/browse/HBASE-7878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13615458#comment-13615458
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Ted Yu commented on HBASE-7878:
-------------------------------
Interesting idea.
In SplitLogManager#splitLogDistributed(), we can issue lease recovery request
after obtaining log file list:
{code}
FileStatus[] logfiles = getFileList(logDirs, filter);
{code}
One intricacy I can think of is that such lease recovery request is issued from
master. SplitLogWorker may encounter the following exception:
{code}
Caused by: org.apache.hadoop.hdfs.protocol.RecoveryInProgressException: Failed
to close file /user/jenkins/hbase/TestHLog/hlogdir/hlog.1364388129638. Lease
recovery is in progress. Try again later.
{code}
Note: RecoveryInProgressException isn't in hadoop 1.0
> 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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