Karthik Kambatla created HADOOP-13860:
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Summary: ZKFailoverController.ElectorCallbacks should have a
non-trivial implementation for enterNeutralMode
Key: HADOOP-13860
URL: https://issues.apache.org/jira/browse/HADOOP-13860
Project: Hadoop Common
Issue Type: Bug
Reporter: Karthik Kambatla
ZKFailoverController.ElectorCallbacks implements enterNeutralMode trivially.
This can lead to a master staying active for longer than necessary, unless the
fencing scheme ensures the first active is transitioned to standby before
transitioning another master to active (e.g. ssh fencing).
YARN-5677 does this for YARN in EmbeddedElectorService. If we choose not to
implement, we should at least document this so any user of ZKFailoverController
in the future is aware.
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