[ https://issues.apache.org/jira/browse/HBASE-27078?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17556535#comment-17556535 ]
Bryan Beaudreault commented on HBASE-27078: ------------------------------------------- Per discussion, I'm going to add new config {{{}hbase.client.meta.scanner.timeout.period{}}}. This will solve the issue for the async client. The branch-2 blocking client has an additional bug, which I will tackle in https://issues.apache.org/jira/browse/HBASE-27142 > 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. -- This message was sent by Atlassian Jira (v8.20.7#820007)