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https://issues.apache.org/jira/browse/HDFS-3869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13446847#comment-13446847
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Eli Collins commented on HDFS-3869:
-----------------------------------
+1 looks great
I'd consider mentioning in a comment above journals that is COW because even
though FSEdit* is synchronized these uses may race with the Web UI (my
understanding of why it is now a CopyOnWriteArrayList).
> QJM: expose non-file journal manager details in web UI
> ------------------------------------------------------
>
> Key: HDFS-3869
> URL: https://issues.apache.org/jira/browse/HDFS-3869
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: name-node
> Affects Versions: QuorumJournalManager (HDFS-3077)
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Attachments: dir-failed.png, hdfs-3869.txt, hdfs-3869.txt,
> lagging-jn.png, open-for-read.png, open-for-write.png
>
>
> Currently, the NN web UI only contains NN storage directories on local disk.
> It should also include details about any non-file JournalManagers in use.
> This JIRA targets the QJM branch, but will be useful for BKJM as well.
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