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https://issues.apache.org/jira/browse/HADOOP-9898?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13810687#comment-13810687
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Andrew Wang commented on HADOOP-9898:
-------------------------------------
+1, LGTM. Thanks Todd. Will commit shortly.
> Set SO_KEEPALIVE on all our sockets
> -----------------------------------
>
> Key: HADOOP-9898
> URL: https://issues.apache.org/jira/browse/HADOOP-9898
> Project: Hadoop Common
> Issue Type: Bug
> Components: ipc, net
> Affects Versions: 3.0.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Minor
> Attachments: hadoop-9898.txt
>
>
> We recently saw an issue where network issues between slaves and the NN
> caused ESTABLISHED TCP connections to pile up and leak on the NN side. It
> looks like the RST packets were getting dropped, which meant that the client
> thought the connections were closed, while they hung open forever on the
> server.
> Setting the SO_KEEPALIVE option on our sockets would prevent this kind of
> leak from going unchecked.
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