Aihua Xu created HDFS-15664:
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Summary: Prevent Observer NameNode from becoming StandBy NameNode
Key: HDFS-15664
URL: https://issues.apache.org/jira/browse/HDFS-15664
Project: Hadoop HDFS
Issue Type: Sub-task
Components: auto-failover
Affects Versions: 2.10.0
Reporter: Aihua Xu
Assignee: Aihua Xu
When the cluster performs a failover from NN1 to NN2, NN2 is asking all the
other NNs to cede active state and transit to StandBy including the Observer
NameNodes.
Seems we should block Observer from becoming StandBy and participating in
Failover. Of course, since we can transit StandBy NameNode to Observer, we can
separately support promote Observer NameNode to StandBy NameNode.
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