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https://issues.apache.org/jira/browse/HBASE-21521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17688343#comment-17688343
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Xiaolin Ha commented on HBASE-21521:
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Merged the PR for 'Expose master startup status via web UI' to branch-2.4+.
Thanks [~bbeaudreault] for reviewing.
[~apurtell] Should we still need to expose the startup information to JMX? If
so, I'll add a new umbrella issue to cover both the web UI and JMX parts.
Thanks.
> Expose master startup status via web UI
> ---------------------------------------
>
> Key: HBASE-21521
> URL: https://issues.apache.org/jira/browse/HBASE-21521
> Project: HBase
> Issue Type: Improvement
> Components: master, UI
> Reporter: Andrew Kyle Purtell
> Assignee: Xiaolin Ha
> Priority: Major
> Fix For: 2.6.0, 3.0.0-alpha-4, 2.5.4
>
> Attachments: hbase-21521-1.png, hbase-21521-2.png, hbase-21521-3.png,
> hbase-21521-4.png, hbase-21521-revised-1.png, hbase-21521-revised-2.png
>
>
> Add an internal API to the master for tracking startup progress. Expose this
> information via JMX.
> Modify the master to bring the web UI up sooner. Will require tweaks to
> various views to prevent attempts to retrieve state before the master fully
> up (or else expect NPEs). Currently, before the master has fully initialized
> an attempt to use the web UI will return a 500 error code and display an
> error page.
> Finally, update the web UI to display startup progress, like HDFS-4249.
> Filing this for branch-1. Need to check what if anything is available or
> improved in branch-2 and master.
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