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https://issues.apache.org/jira/browse/HBASE-25549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17788828#comment-17788828
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Bryan Beaudreault commented on HBASE-25549:
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I'm curious how you plan to reopen regions with this feature. I don't think we
have a user API for reopening regions. You can unassign and then assign, but
that leaves you at risk of handling errors and recovery in your automation.
I wonder if https://issues.apache.org/jira/browse/HBASE-28215 is better for
handling RIT storms, since the hmaster procedure framework already has error
handling and state recovery built in, just not throttling (yet).
I still like this feature for things like changing region normalizer target
sizes and such, in which case I plan to never reopen the regions (until they
reopen organically as regions move).
> Provide a switch that allows avoiding reopening all regions when modifying a
> table to prevent RIT storms.
> ---------------------------------------------------------------------------------------------------------
>
> Key: HBASE-25549
> URL: https://issues.apache.org/jira/browse/HBASE-25549
> Project: HBase
> Issue Type: Improvement
> Components: master, shell
> Affects Versions: 3.0.0-alpha-1
> Reporter: Zhuoyue Huang
> Assignee: Zhuoyue Huang
> Priority: Major
> Fix For: 2.6.0, 3.0.0-beta-1, 2.5.7
>
>
> Under normal circumstances, modifying a table will cause all regions
> belonging to the table to enter RIT. Imagine the following two scenarios：
> # Someone entered the wrong configuration （e.g. negative
> 'hbase.busy.wait.multiplier.max' value） when altering the table, causing
> thousands of online regions to fail to open, leading to online accidents.
> # Modify the configuration of a table, but this modification is not urgent,
> the regions are not expected to enter RIT immediately.
> -'alter_lazy' is a new command to modify a table without reopening any online
> regions except those regions were assigned by other threads or split etc.-
>
> Provide an optional lazy_mode for the alter command to modify the
> TableDescriptor without the region entering the RIT. The modification will
> take effect when the region is reopened.
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