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https://issues.apache.org/jira/browse/HBASE-7878?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13585030#comment-13585030
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Uma Maheswara Rao G commented on HBASE-7878:
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+1 for committing this patch. Later once HDFS API comes to know whether file is
comlpetely colsed or not, that time may be we can limit retries with config.
But I am not sure why append and close required in code?[not part of this
patch]. Looping one more time by invoking recoverLease itself can get true
return value if file is closed. If file is not closed append call also will
fail anyway.
> 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
> Reporter: Eric Newton
> Assignee: Ted Yu
> Priority: Critical
> Fix For: 0.96.0, 0.94.6
>
> Attachments: 7878-trunk-v2.txt, 7878-trunk-v3.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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