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https://issues.apache.org/jira/browse/HDFS-17402?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18023937#comment-18023937
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ASF GitHub Bot commented on HDFS-17402:
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github-actions[bot] closed pull request #6618: HDFS-17402. StartupSafeMode 
should not exit when resources are from l…
URL: https://github.com/apache/hadoop/pull/6618




> StartupSafeMode should not exit when resources are from low to available
> ------------------------------------------------------------------------
>
>                 Key: HDFS-17402
>                 URL: https://issues.apache.org/jira/browse/HDFS-17402
>             Project: Hadoop HDFS
>          Issue Type: Bug
>            Reporter: Zilong Zhu
>            Assignee: Zilong Zhu
>            Priority: Major
>              Labels: pull-request-available
>
> After HDFS-17231, NameNode can exit safemode automatically when resources are 
> from low to available. It used 
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem#leaveSafeMode, this 
> function will change BMSafeModeStatus. However, NameNode entering resource 
> low safe mode doesn't change BMSafeModeStatus in 
> org.apache.hadoop.hdfs.server.namenode.FSNamesystem#enterSafeMode. This is 
> not equal
> Now:
> a. NN enter StartupSafeMode
> b. NN enter ResourceLowSafeMode
> c. NN resources from low to available
> d. NN safemode off
>  
> Expectations:
> a. NN enter StartupSafeMode
> b. NN enter ResourceLowSafeMode
> c. NN resources from low to available
> d. NN exit ResourceLowSafeMode but in StartupSafeMode



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