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https://issues.apache.org/jira/browse/HBASE-27078?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17544656#comment-17544656
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Duo Zhang commented on HBASE-27078:
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+1 on introducing these two configs if they are not already there.
> Allow configuring a separate timeout for meta scans
> ---------------------------------------------------
>
> Key: HBASE-27078
> URL: https://issues.apache.org/jira/browse/HBASE-27078
> Project: HBase
> Issue Type: Improvement
> Reporter: Bryan Beaudreault
> Priority: Major
>
> There is a {{hbase.client.meta.operation.timeout}} but it does not apply to
> meta scans, which are the primary use-case for clients (i.e. through
> RegionLocator).
> Many user-facing clients may want to have low rpc and scan timeouts. However,
> in periods of meta hotspotting, those timeouts can be way too low for the
> meta scans. The problem with low timeouts for meta scans is that without a
> populated MetaCache, user requests cannot succeed. In fact, user requests
> will continually try to re-scan meta until the MetaCache is populated. So
> having a lower rpc timeout will cause a situation where meta scans cannot
> succeed, and thus user requests cannot succeed. In this case I think it'd be
> preferable to relax the rpc timeout for meta requests so that a few long
> requests can unblock many faster requests.
> My suggestion would be to add an {{hbase.client.meta.rpc.timeout}} and ensure
> that it applies to meta scans. I also think it would be less confusing to
> have {{hbase.client.meta.operation.timeout}} apply as the scanner timeout
> period for meta scans.
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