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https://issues.apache.org/jira/browse/HDFS-17763?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aditya Raj Verma updated HDFS-17763:
------------------------------------
        Fix Version/s:     (was: 3.3.0)
    Affects Version/s:     (was: 3.3.0)

> 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
>            Reporter: Aditya Raj Verma
>            Priority: Major
>
> 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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