hadoop-hdfs-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HDFS-3693) QJM: JNStorage should read its storage info even before a writer becomes active
Date Wed, 25 Jul 2012 21:48:35 GMT

     [ https://issues.apache.org/jira/browse/HDFS-3693?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon resolved HDFS-3693.
-------------------------------

       Resolution: Fixed
    Fix Version/s: QuorumJournalManager (HDFS-3077)
     Hadoop Flags: Reviewed

Committed to branch, with nit addressed in the commit. Thanks for reviewing.
                
> QJM: JNStorage should read its storage info even before a writer becomes active
> -------------------------------------------------------------------------------
>
>                 Key: HDFS-3693
>                 URL: https://issues.apache.org/jira/browse/HDFS-3693
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>    Affects Versions: QuorumJournalManager (HDFS-3077)
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Minor
>             Fix For: QuorumJournalManager (HDFS-3077)
>
>         Attachments: hdfs-3693.txt
>
>
> In order for QJM to work with HA, the standby needs to be able to read from a JournalNode
even when no active has written to it. In the current code, it reads the StorageInfo only
when {{newEpoch()}} is called. But, that's only called when a writer becomes active. This
causes the SBN to fail at startup since the JN thinks its storage info is uninitialized.

--
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