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Posted to hdfs-dev@hadoop.apache.org by "Hairong Kuang (JIRA)" <ji...@apache.org> on 2011/01/07 21:29:52 UTC
[jira] Resolved: (HDFS-1555) HDFS 20 append: Disallow pipeline
recovery if a file is already being lease recovered
[ https://issues.apache.org/jira/browse/HDFS-1555?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hairong Kuang resolved HDFS-1555.
---------------------------------
Resolution: Fixed
Hadoop Flags: [Reviewed]
I just committed this!
> HDFS 20 append: Disallow pipeline recovery if a file is already being lease recovered
> -------------------------------------------------------------------------------------
>
> Key: HDFS-1555
> URL: https://issues.apache.org/jira/browse/HDFS-1555
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 0.20-append
> Reporter: Hairong Kuang
> Assignee: Hairong Kuang
> Fix For: 0.20-append
>
> Attachments: appendRecoveryRace.patch, recoveryRace.patch
>
>
> When a file is under lease recovery and the writer is still alive, the write pipeline will be killed and then the writer will start a pipeline recovery. Sometimes the pipeline recovery may race before the lease recovery and as a result fail the lease recovery. This is very bad if we want to support the strong recoverLease semantics in HDFS-1554. So it would be nice if we could disallow a file's pipeline recovery while its lease recovery is in progress.
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