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https://issues.apache.org/jira/browse/HDFS-1574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13153499#comment-13153499
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Harsh J commented on HDFS-1574:
-------------------------------
Via HDFS-2567, the file browser is also inaccessible when there are no
DataNodes available.
> HDFS cannot be browsed from web UI while in safe mode
> -----------------------------------------------------
>
> Key: HDFS-1574
> URL: https://issues.apache.org/jira/browse/HDFS-1574
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Priority: Blocker
> Labels: newbie
>
> As of HDFS-984, the NN does not issue delegation tokens while in safe mode
> (since it would require writing to the edit log). But the browsedfscontent
> servlet relies on getting a delegation token before redirecting to a random
> DN to browse the FS. Thus, the "browse the filesystem" link does not work
> while the NN is in safe mode.
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