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https://issues.apache.org/jira/browse/HDFS-6338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13989220#comment-13989220
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Fengdong Yu commented on HDFS-6338:
-----------------------------------

Ted,

recoverLease() is not I want, which is revoke the lease. but I aim to delete 
the lease. explain in detail:

DFSClient can generate a clientID such as NOMAPREDUCE-1000 before write file-a 
on HDFS, but it was interrupted and not closed normally.

then I try to write it again, DFSClient will generate annothe clientID, such as 
NOMAPREDUCE-1001, then it throw an exception such as :

failed to create file because this file is already being created by 
NOMAPREDUCE-1000.

So I have to waite NOMAPREDUCE-1000 expire. 


> Add a RPC method to allow administrator to delete the file lease.
> -----------------------------------------------------------------
>
>                 Key: HDFS-6338
>                 URL: https://issues.apache.org/jira/browse/HDFS-6338
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: namenode
>    Affects Versions: 2.4.0
>            Reporter: Fengdong Yu
>            Assignee: Fengdong Yu
>            Priority: Minor
>
> we have to wait file lease expire after unexpected interrupt during HDFS 
> writing. so I want to add a RPC method to allow administrator delete the file 
> lease.
> Please leave comments here, I am workong on the patch now.



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