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https://issues.apache.org/jira/browse/HDFS-9430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15036457#comment-15036457
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Tsz Wo Nicholas Sze commented on HDFS-9430:
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waitForLoadingFSImage() and checkNNStartup() safeguards FSNamesystem and
NameNodeRpcServer, respectively. In namenode, waitForLoadingFSImage() is not
needed as mentioned.
However, FSNamesystem is also used in SecondaryNameNode and BackupNode and they
don't have checkNNStartup(). We may forget about BackupNode since it is not
working for a long time anyway. We need to make sure SecondaryNameNode still
work correctly after the change.
> waitforloadingfsimage() can be removed since checknnstartup() already ensures
> image loaded and namenode started.
> ----------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-9430
> URL: https://issues.apache.org/jira/browse/HDFS-9430
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Brahma Reddy Battula
> Assignee: Brahma Reddy Battula
> Attachments: HDFS-9430.patch
>
>
> After initial startup,loading fsimage in between happens only for
> secondarynn..But it wn't server any client requests.
> So IMO it would be ok to remove it.
> Please check commement [here
> |https://issues.apache.org/jira/browse/HDFS-9413?focusedCommentId=15005129&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15005129]
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