hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Vinay (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-4238) [HA] Standby namenode should not do purging of shared storage edits.
Date Tue, 04 Dec 2012 04:57:59 GMT

    [ https://issues.apache.org/jira/browse/HDFS-4238?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13509506#comment-13509506
] 

Vinay commented on HDFS-4238:
-----------------------------

Thanks Todd, patch looks good to me. +1.
                
> [HA] Standby namenode should not do purging of shared storage edits.
> --------------------------------------------------------------------
>
>                 Key: HDFS-4238
>                 URL: https://issues.apache.org/jira/browse/HDFS-4238
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: ha
>    Affects Versions: 3.0.0, 2.0.2-alpha
>            Reporter: Vinay
>            Assignee: Todd Lipcon
>         Attachments: hdfs-4238.txt, hdfs-4238.txt
>
>
> This happened in our cluster,
> >> Standby NN was keep doing checkpoint every one hour and uploading to Active
NN was continuously failing due to some kerberos issue and nobody noticed this, since Active
was servicing properly.
> >> Active NN was up for long time with fsimage having very least transaction.
> >> Standby NN has saved the checkpoint in its name dir and purged the txns >
1000000 from shared storage ( includes edits which are not present in Active NN's fsimage)
> >> After some time Active NN is restarted and StandBy NN switched to Active.
> Now current Standby not able to load any edits from shared storage, as expected edits
are not present in shared storage. Its keep running idle.
> So {{editLog.purgeLogsOlderThan(purgeLogsFrom);}} always should be called from Active
NameNode.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

Mime
View raw message