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https://issues.apache.org/jira/browse/HBASE-8670?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13672064#comment-13672064
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Andrew Purtell commented on HBASE-8670:
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Are we still supporting pre Hadoop 1 versions with 0.94?
> [0.94] Backport HBASE-8449 and HBASE-8204 to 0.94 (Refactor recoverLease
> retries and pauses)
> --------------------------------------------------------------------------------------------
>
> Key: HBASE-8670
> URL: https://issues.apache.org/jira/browse/HBASE-8670
> Project: HBase
> Issue Type: Bug
> Components: Filesystem Integration, master, wal
> Reporter: Enis Soztutar
> Assignee: Enis Soztutar
> Fix For: 0.94.9
>
> Attachments: hbase-8670_v1.patch
>
>
> Some history:
> Up until 0.94.8, Hbase did not check the result of recoverLease() call, but
> things kind of worked since we are checking for 0-length files in distributed
> log split tasks from region servers. If lease recovery is not finished, the
> log file will report 0 length, and the task will fail, and master will then
> re-call recoverLease() and reassign the task. This scheme might fail for log
> files that are larger than 1 hdfs block though.
> In 0.94.8, we committed (HBASE-8354, which is backport of HBASE-7878) and
> later increased the sleep time to 4 secs in HBASE-8389.
> However, the proper solution arrived in trunk in HBASE-8449 which uses a
> backoff sleep policy + isFileClosed() api. We should backport this patch to
> 0.94 as well.
> isFileClosed() is released in Hadoop 1.2.0 (HDFS-4774) and 2.0.5(HDFS-4525).
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