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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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Hrishikesh Gadre updated HDFS-13820:
------------------------------------
    Attachment: HDFS-13820-002.patch

> 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
>         Attachments: HDFS-13820-001.patch, HDFS-13820-002.patch
>
>
> 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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