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From "Jing Zhao (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-6038) JournalNode hardcodes NameNodeLayoutVersion in the edit log file
Date Wed, 05 Mar 2014 23:20:49 GMT

     [ https://issues.apache.org/jira/browse/HDFS-6038?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Jing Zhao updated HDFS-6038:

    Status: Patch Available  (was: Open)

> JournalNode hardcodes NameNodeLayoutVersion in the edit log file
> ----------------------------------------------------------------
>                 Key: HDFS-6038
>                 URL: https://issues.apache.org/jira/browse/HDFS-6038
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: datanode, ha, hdfs-client, namenode
>            Reporter: Haohui Mai
>            Assignee: Jing Zhao
>         Attachments: HDFS-6038.000.patch, HDFS-6038.001.patch, HDFS-6038.002.patch
> In HA setup, the JNs receive edit logs (blob) from the NN and write into edit log files.
In order to write well-formed edit log files, the JNs prepend a header for each edit log file.
> The problem is that the JN hard-codes the version (i.e., {{NameNodeLayoutVersion}} in
the edit log, therefore it generates incorrect edit logs when the newer release bumps the
{{NameNodeLayoutVersion}} during rolling upgrade.

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