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https://issues.apache.org/jira/browse/HDFS-12754?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16252905#comment-16252905
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Xiao Chen commented on HDFS-12754:
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Thanks for clarifying [~yangjiandan], sorry if I wasn't articulating clearly. I
think we're saying the same thing here: {{dfsClient.closeAllFilesBeingWritten}}
out of the LeaseRenewer's {{synchronized}} block, which eliminates the previous
sequence that could lead to the deadlock.
> Lease renewal can hit a deadlock
> ---------------------------------
>
> Key: HDFS-12754
> URL: https://issues.apache.org/jira/browse/HDFS-12754
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.8.1
> Reporter: Kuhu Shukla
> Assignee: Kuhu Shukla
> Attachments: HDFS-12754.001.patch, HDFS-12754.002.patch,
> HDFS-12754.003.patch, HDFS-12754.004.patch, HDFS-12754.005.patch,
> HDFS-12754.006.patch, HDFS-12754.007.patch
>
>
> The Client and the renewer can hit a deadlock during close operation since
> closeFile() reaches back to the DFSClient#removeFileBeingWritten. This is
> possible if the client class close when the renewer is renewing a lease.
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