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https://issues.apache.org/jira/browse/HDFS-7603?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee updated HDFS-7603:
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Status: Patch Available (was: Open)
> The background replication queue initialization may not let other run
> ---------------------------------------------------------------------
>
> Key: HDFS-7603
> URL: https://issues.apache.org/jira/browse/HDFS-7603
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: rolling upgrades
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Priority: Critical
> Attachments: HDFS-7603.patch
>
>
> The background replication queue initialization processes configured number
> of blocks at a time and releases the namesystem write lock. This was to let
> namenode start serving right after a standby to active transition or leaving
> safe mode. However, this does not allow others to run much if the lock
> fairness is set to "unfair" for the higher throughput.
> I propose adding a delay between unlocking and locking in the async repl
> queue init thread.
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