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https://issues.apache.org/jira/browse/HADOOP-727?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Owen O'Malley resolved HADOOP-727.
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Resolution: Duplicate
I think we can close this now that Zookeeper is a subproject.
> Hadoop should include a general purpose distributed lock manager
> ----------------------------------------------------------------
>
> Key: HADOOP-727
> URL: https://issues.apache.org/jira/browse/HADOOP-727
> Project: Hadoop Core
> Issue Type: New Feature
> Components: ipc
> Reporter: Sameer Paranjpye
> Assignee: Owen O'Malley
> Priority: Minor
>
> Related to HADOOP-726. Currently, there is no good way for distributed apps
> using HDFS or Map/Reduce to synchronize their operations. HDFS locking
> doesn't work very well and lock management is an unnecessary burden on the
> namenode. In addition, it depending on the filesystem for locking could make
> applications less portable. Hadoop should implement a general purpose
> distributed lock management service.
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