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https://issues.apache.org/jira/browse/HDFS-16547?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17636808#comment-17636808
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ASF GitHub Bot commented on HDFS-16547:
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xkrogen merged PR #4201:
URL: https://github.com/apache/hadoop/pull/4201
> [SBN read] Namenode in safe mode should not be transfered to observer state
> ---------------------------------------------------------------------------
>
> Key: HDFS-16547
> URL: https://issues.apache.org/jira/browse/HDFS-16547
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Tao Li
> Assignee: Tao Li
> Priority: Major
> Labels: pull-request-available
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> 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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