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Posted to hdfs-dev@hadoop.apache.org by "Hairong Kuang (JIRA)" <ji...@apache.org> on 2010/12/23 00:35:00 UTC
[jira] Created: (HDFS-1555) HDFS 20 append: Disallow pipeline
recovery if a file is already being lease recovered
HDFS 20 append: Disallow pipeline recovery if a file is already being lease recovered
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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
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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[jira] Resolved: (HDFS-1555) HDFS 20 append: Disallow pipeline
recovery if a file is already being lease recovered
Posted by "Hairong Kuang (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HDFS-1555?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hairong Kuang resolved HDFS-1555.
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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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