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Posted to hdfs-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2012/06/27 03:49:43 UTC

[jira] [Created] (HDFS-3573) Supply NamespaceInfo when instantiating JournalManagers

Todd Lipcon created HDFS-3573:
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             Summary: 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
         Attachments: 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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