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https://issues.apache.org/jira/browse/HDFS-13820?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on HDFS-13820 started by Hrishikesh Gadre.
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> Disable CacheReplicationMonitor If No Cached Paths Exist
> --------------------------------------------------------
>
> Key: HDFS-13820
> URL: https://issues.apache.org/jira/browse/HDFS-13820
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: caching
> Affects Versions: 2.10.0, 3.2.0
> Reporter: BELUGA BEHR
> Assignee: Hrishikesh Gadre
> Priority: Minor
>
> Stating with [HDFS-6106] the loop for checking caching is set to be every 30
> seconds.
> Please implement a way to disable the {{CacheReplicationMonitor}} class if
> there are no paths specified. Adding the first cached path to the NameNode
> should kick off the {{CacheReplicationMonitor}} and when the last one is
> deleted, the {{CacheReplicationMonitor}} should be disabled again.
> Alternatively, provide a configuration flag to turn this feature off
> altogether.
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