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https://issues.apache.org/jira/browse/HDFS-17685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HDFS-17685:
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    Labels: pull-request-available  (was: )

> Option to explicitly choose DFS client lease renewal interval
> -------------------------------------------------------------
>
>                 Key: HDFS-17685
>                 URL: https://issues.apache.org/jira/browse/HDFS-17685
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: dfsclient
>            Reporter: Charles Connell
>            Priority: Minor
>              Labels: pull-request-available
>
> Currently, DFSClients send lease renewals to the NameNode at an interval 
> equal to half of {{ipc.client.rpc-timeout.ms}}. This logic dates back to 2009 
> in HDFS-278. At my company, we are interested in using short DFS client 
> timeouts (< 10 seconds). However, we're currently hesitant to do so because 
> that would flood the NameNode with lease renewals.
> I propose a setting {{dfs.client.lease.renewal.interval.ms}} that, if 
> nonzero, would be used as the lease renewal interval instead of 
> {{ipc.client.rpc-timeout.ms / 2}}. This would be useful for advanced users 
> that want to control their RPC timeout and lease renewals separately.



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