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From "Todd Lipcon (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-2634) Standby needs to ingest latest edit logs before transitioning to active`
Date Mon, 05 Dec 2011 23:06:40 GMT
Standby needs to ingest latest edit logs before transitioning to active`
------------------------------------------------------------------------

                 Key: HDFS-2634
                 URL: https://issues.apache.org/jira/browse/HDFS-2634
             Project: Hadoop HDFS
          Issue Type: Sub-task
          Components: ha, name-node
    Affects Versions: HA branch (HDFS-1623)
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon
            Priority: Critical


When the standby transitions to active state, it needs to _read_ the latest edit logs before
it reopens them for write access. Currently, the transition calls {{stopStandbyServices}},
which stops the tailer, but doesn't read ahead to the very end. This ends up leaving the shared
edits dir in an inconsistent state where we have overlapping transaction IDs.

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