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https://issues.apache.org/jira/browse/HDFS-2788?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13185882#comment-13185882
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Kihwal Lee commented on HDFS-2788:
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Yes, that seems to be the case.
> HdfsServerConstants#DN_KEEPALIVE_TIMEOUT is dead code
> -----------------------------------------------------
>
> Key: HDFS-2788
> URL: https://issues.apache.org/jira/browse/HDFS-2788
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: data-node
> Affects Versions: 0.22.0, 0.23.0
> Reporter: Eli Collins
> Assignee: Eli Collins
> Attachments: hdfs-2788.txt
>
>
> HDFS-941 introduced HdfsServerConstants#DN_KEEPALIVE_TIMEOUT but its never
> used. Perhaps was renamed to
> DFSConfigKeys#DFS_DATANODE_SOCKET_REUSE_KEEPALIVE_DEFAULT while the patch was
> written and the old one wasn't deleted.
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