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https://issues.apache.org/jira/browse/HDFS-11945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee reassigned HDFS-11945:
---------------------------------

    Assignee: Kihwal Lee

> Internal lease recovery may not be retried for a long time
> ----------------------------------------------------------
>
>                 Key: HDFS-11945
>                 URL: https://issues.apache.org/jira/browse/HDFS-11945
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: namenode
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>
> Lease is assigned per client who is identified by its holder ID or client ID, 
> thus a renewal or an expiration of a lease affects all files being written by 
> the client.
> When a client/writer dies without closing a file, its lease expires in one 
> hour (hard limit) and the namenode tries to recover the lease. As a part of 
> the process, the namenode takes the ownership of the lease and renews it. If 
> the recovery does not finish successfully, the lease will expire in one hour 
> and the namenode will try again to recover the lease.
> However, if a file system has another lease expiring within the hour, the 
> recovery attempt for the lease will push forward the expiration of the lease 
> held by the namenode.  This causes failed lease recoveries to be not retried 
> for a long time. We have seen it happening for days.



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