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From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2507) HA: Allow saveNamespace operations to be canceled
Date Wed, 26 Oct 2011 20:27:32 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2507?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13136324#comment-13136324

Todd Lipcon commented on HDFS-2507:

The failing tests are failing because TestDfsOverAvroRpc failed right before it, leaving a
locked namespace directory in place. This is not a new issue due to this patch. This should
be ready for review.
> HA: Allow saveNamespace operations to be canceled
> -------------------------------------------------
>                 Key: HDFS-2507
>                 URL: https://issues.apache.org/jira/browse/HDFS-2507
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: name-node
>    Affects Versions: HA branch (HDFS-1623), 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>         Attachments: hdfs-2507.txt
> For HDFS-2291 (checkpointing in HA setup) we need to allow the StandbyNode to handle
a failover while it may be in the middle of saving a checkpoint. This implies that checkpoints
need to be abortable.
> This JIRA is to implement this functionality. Even though this is only needed for HA,
I think we should do the infrastructure in trunk to simplify future merges.

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