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https://issues.apache.org/jira/browse/HDFS-3573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HDFS-3573:
------------------------------

       Resolution: Fixed
    Fix Version/s: 3.0.0
     Hadoop Flags: Reviewed
           Status: Resolved  (was: Patch Available)
    
> Supply NamespaceInfo when instantiating JournalManagers
> -------------------------------------------------------
>
>                 Key: HDFS-3573
>                 URL: https://issues.apache.org/jira/browse/HDFS-3573
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: name-node
>    Affects Versions: 3.0.0
>            Reporter: Todd Lipcon
>            Assignee: Todd Lipcon
>            Priority: Minor
>             Fix For: 3.0.0
>
>         Attachments: hdfs-3573.txt, hdfs-3573.txt, hdfs-3573.txt, 
> hdfs-3573.txt
>
>
> Currently, the JournalManagers are instantiated before the NamespaceInfo is 
> loaded from local storage directories. This is problematic since the JM may 
> want to verify that the storage info associated with the journal matches the 
> NN which is starting up (eg to prevent an operator accidentally configuring 
> two clusters against the same remote journal storage). This JIRA rejiggers 
> the initialization sequence so that the JMs receive NamespaceInfo as a 
> constructor argument.

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