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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4859) Add timeout in FileJournalManager
Date Tue, 28 May 2013 17:02:21 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13668447#comment-13668447
] 

Todd Lipcon commented on HDFS-4859:
-----------------------------------

Hey Kihwal. Are you planning on using NFS based HA? I'd highly recommend using QJM instead
-- it has timeout features and has been much more reliable for us in production clusters.
                
> Add timeout in FileJournalManager
> ---------------------------------
>
>                 Key: HDFS-4859
>                 URL: https://issues.apache.org/jira/browse/HDFS-4859
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha, namenode
>    Affects Versions: 2.0.4-alpha
>            Reporter: Kihwal Lee
>
> Due to absence of explicit timeout in FileJournalManager, error conditions that incur
long delay (usually until driver timeout) can make namenode unresponsive for long time. This
directly affects NN's failure detection latency, which is critical in HA.

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