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From "Todd Lipcon (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-2753) Standby namenode stuck in safemode during a failover
Date Mon, 09 Jan 2012 20:57:39 GMT

     [ https://issues.apache.org/jira/browse/HDFS-2753?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Todd Lipcon updated HDFS-2753:
------------------------------

    Attachment: hdfs-2753.txt

Attached patch includes a new unit test which triggered the bug as described.

I also fixed several issues in the patch that Hari had uploaded:
- should use javadoc style comments for member variables
- no need to introduce a new function {{processedBlockReport}} in {{DatanodeDescriptor}} since
we already have {{receivedBlockReport}} for the same purpose
- the new function was never being called, since it was mistakenly put inside the "skip processing"
code path instead of the "do processing" code path
- renamed {{firstBlockReport()}} function to {{isFirstBlockReport()}} since it returns a boolean
                
> Standby namenode stuck in safemode during a failover
> ----------------------------------------------------
>
>                 Key: HDFS-2753
>                 URL: https://issues.apache.org/jira/browse/HDFS-2753
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: ha, name-node
>    Affects Versions: HA branch (HDFS-1623)
>            Reporter: Hari Mankude
>            Assignee: Hari Mankude
>         Attachments: HDFS-2753.patch, hdfs-2753.txt
>
>
> Write traffic initiated from the client. Manual failover is done by killing NN and converting
a  different standby to active. NN is restarted as standby. The restarted standby stays in
safemode forever. More information in the description.

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