Aditya Raj Verma created HDFS-17763:
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Summary: backport HDFS-16547 to hadoop 3.3 feature to dissallow
observer transition if namenode is in safemode
Key: HDFS-17763
URL: https://issues.apache.org/jira/browse/HDFS-17763
Project: Hadoop HDFS
Issue Type: Improvement
Components: namenode
Affects Versions: 3.3.0
Reporter: Aditya Raj Verma
Fix For: 3.3.0
Backport HDFS-16547 to hadoop 3.3 feature to dissallow observer transition if
namenode is in safemode.
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 transfered to observer state.
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