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https://issues.apache.org/jira/browse/HBASE-21073?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16651749#comment-16651749
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stack commented on HBASE-21073:
-------------------------------
bq. ... i don't have any good ideas on how to test some of the various failure
conditions that you suggest you are interested in, from the issue description.
The item you cite could be a follow-on. What you have here is a nice first cut
at a 'maintenance mode' (or, hang on, let me review it again before I call it
'nice').
bq. We currently have a solution that will load meta, skip coproc, quotas,
favored nodes.
Also skips normalizer, balancer, catalogjanitor runs as the old maintenance
mode would.
This sounds good.
> "Maintenance mode" master
> -------------------------
>
> Key: HBASE-21073
> URL: https://issues.apache.org/jira/browse/HBASE-21073
> Project: HBase
> Issue Type: Sub-task
> Components: amv2, hbck2, master
> Reporter: stack
> Assignee: Mike Drob
> Priority: Major
> Attachments: HBASE-21073.master.001.patch,
> HBASE-21073.master.002.patch, HBASE-21073.master.003.patch,
> HBASE-21073.master.004.patch, HBASE-21073.master.005.patch,
> HBASE-21073.master.006.patch
>
>
> Make it so we can bring up a Master in "maintenance mode". This is parse of
> master wal procs but not taking on regionservers. It would be in a state
> where "repair" Procedures could run; e.g. a Procedure that could recover meta
> by looking for meta WALs, splitting them, dropping recovered.edits, and even
> making it so meta is readable. See parent issue for why needed (disaster
> recovery).
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