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https://issues.apache.org/jira/browse/HBASE-21521?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16916199#comment-16916199
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Andrew Purtell edited comment on HBASE-21521 at 8/26/19 11:00 PM:
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What stack said.
However, the inspiration for this idea comes in part from what HDFS does for
their namenode: HDFS-4249 . Judging by the screenshot on that JIRA a lot of
front end knowledge was not required. Looks like a table and some basic
formatting. rendered once. To update you refetch at the browser.
Namenode startup can be orders of magnitude longer than HBase master startup
for all but the really abnormal cases (like hundreds of queued
ServerCrashProcedures) so the pressure to do a detailed phase by phase status
report update is less, but would still be nice.
was (Author: apurtell):
What stack said.
However, the inspiration for this idea comes in part from what HDFS does for
their namenode: HDFS-4249
Namenode startup can be orders of magnitude longer than HBase master startup
for all but the really abnormal cases (like hundreds of queued
ServerCrashProcedures) so the pressure to do a detailed phase by phase status
report update is less, but would still be nice.
> Expose master startup status via JMX and web UI
> -----------------------------------------------
>
> Key: HBASE-21521
> URL: https://issues.apache.org/jira/browse/HBASE-21521
> Project: HBase
> Issue Type: Improvement
> Components: master, UI
> Reporter: Andrew Purtell
> Priority: Major
>
> 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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