tomscut created HDFS-16547:
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Summary: [SBN read] Namenode in safe mode should not be transfer
to observer state
Key: HDFS-16547
URL: https://issues.apache.org/jira/browse/HDFS-16547
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: tomscut
Assignee: tomscut
Currently, when a Namenode is in safemode(under starting or enter safemode
manually), we can transfer this Namenode to Observer by command. This Observer
node may receive many requests and then throw a SafemodeException, this causes
unnecessary failover on the client.
So Namenode in safe mode should not be transfer to observer state.
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