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Posted to common-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2013/08/22 23:17:51 UTC

[jira] [Created] (HADOOP-9898) Set SO_KEEPALIVE on all our sockets

Todd Lipcon created HADOOP-9898:
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             Summary: 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
            Priority: Minor


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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