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https://issues.apache.org/jira/browse/HDFS-3032?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee updated HDFS-3032:
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Status: Patch Available (was: Open)
> Lease renewer tries forever even if renewal is not possible
> -----------------------------------------------------------
>
> Key: HDFS-3032
> URL: https://issues.apache.org/jira/browse/HDFS-3032
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: hdfs client
> Affects Versions: 0.23.0, 0.24.0, 0.23.1
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Fix For: 0.24.0, 0.23.2, 0.23.3
>
> Attachments: hdfs-3032.patch.txt
>
>
> When LeaseRenewer gets an IOException while attempting to renew for a client,
> it retries after sleeping 500ms. If the exception is caused by a condition
> that will never change, it keeps talking to the name node until the DFSClient
> object is closed or aborted. With the FileSystem cache, a DFSClient can stay
> alive for very long time. We've seen the cases in which node managers and
> long living jobs flooding name node with this type of calls.
> The current proposal is to abort the client when RemoteException is caught
> during renewal. LeaseRenewer already does abort on all clients when it sees a
> SocketTimeoutException.
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