HA: Fix NN Active->Standby transition
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Key: HDFS-2667
URL: https://issues.apache.org/jira/browse/HDFS-2667
Project: Hadoop HDFS
Issue Type: Sub-task
Components: ha, name-node
Affects Versions: HA branch (HDFS-1623)
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Currently when the active transitions to standby (eg for a manual failover) the
EditLogTailer starts tailing edits at the wrong transaction ID. This causes it
to double-apply a bunch of edits, which causes various problems. We need to add
a test which checks this state transition and fix any related bugs.
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