hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Eli Collins (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2691) HA: Tests and fixes for pipeline targets and replica recovery
Date Mon, 30 Jan 2012 00:37:10 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13195895#comment-13195895
] 

Eli Collins commented on HDFS-2691:
-----------------------------------

+1  looks great
                
> HA: Tests and fixes for pipeline targets and replica recovery
> -------------------------------------------------------------
>
>                 Key: HDFS-2691
>                 URL: https://issues.apache.org/jira/browse/HDFS-2691
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Critical
>         Attachments: hdfs-2691.txt, hdfs-2691.txt, hdfs-2691.txt, hdfs-2691.txt
>
>
> Currently there are some TODOs around pipeline/recovery code in the HA branch. For example,
commitBlockSynchronization only gets sent to the active NN which may have failed over by that
point. So, we need to write some tests here and figure out what the correct behavior is.
> Another related area is the treatment of targets in the pipeline. When a pipeline is
created, the active NN adds the "expected locations" to the BlockInfoUnderConstruction, but
the DN identifiers aren't logged with the OP_ADD. So after a failover, the BlockInfoUnderConstruction
will have no targets and I imagine replica recovery would probably trigger some issues.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message