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From "Todd Lipcon (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2812) When becoming active, NN should treat all leases as freshly renewed
Date Thu, 19 Jan 2012 20:48:39 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2812?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Todd Lipcon updated HDFS-2812:

    Attachment: hdfs-2812.txt
> When becoming active, NN should treat all leases as freshly renewed
> -------------------------------------------------------------------
>                 Key: HDFS-2812
>                 URL: https://issues.apache.org/jira/browse/HDFS-2812
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, name-node
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Critical
>         Attachments: hdfs-2812.txt
> I haven't seen this yet in practice, but I think the following is a bug:
> - Clients currently only renew leases to the active NN
> - Leases are written into the log when created, but there is no record to renew them
> - In Standby state, we don't check leases for expiration. But, when we fail over and
start the lease monitor, since the leases haven't been renewed, they might end up getting
incorrectly released.

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