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https://issues.apache.org/jira/browse/HDFS-1142?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12870870#action_12870870
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sam rash commented on HDFS-1142:
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note: I think this case also violates() sync semantics if during 5 the client 
called sync. 

> Lease recovery doesn't reassign lease when triggered by append()
> ----------------------------------------------------------------
>
>                 Key: HDFS-1142
>                 URL: https://issues.apache.org/jira/browse/HDFS-1142
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.21.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-1142.txt, hdfs-1142.txt
>
>
> If a soft lease has expired and another writer calls append(), it triggers 
> lease recovery but doesn't reassign the lease to a new owner. Therefore, the 
> old writer can continue to allocate new blocks, try to steal back the lease, 
> etc. This is for the testRecoveryOnBlockBoundary case of HDFS-1139

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