Standby needs to ingest latest edit logs before transitioning to active`
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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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