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https://issues.apache.org/jira/browse/HDFS-17763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17943221#comment-17943221
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ASF GitHub Bot commented on HDFS-17763:
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adityarverma closed pull request #7321: HDFS-17763: Backport HDFS-16547 feature
to block observer transition if namenode is in safemode
URL: https://github.com/apache/hadoop/pull/7321
> backport HDFS-16547 to hadoop 3.3 feature to block 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
> Labels: pull-request-available
>
> 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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