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https://issues.apache.org/jira/browse/HBASE-29626?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Viraj Jasani resolved HBASE-29626.
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Fix Version/s: 2.7.0
3.0.0-beta-2
2.6.4
Hadoop Flags: Reviewed
Resolution: Fixed
> Refactor server side scan metrics for Coproc hooks
> --------------------------------------------------
>
> Key: HBASE-29626
> URL: https://issues.apache.org/jira/browse/HBASE-29626
> Project: HBase
> Issue Type: Improvement
> Reporter: Sanjeet Malhotra
> Assignee: Sanjeet Malhotra
> Priority: Minor
> Labels: pull-request-available
> Fix For: 2.7.0, 3.0.0-beta-2, 2.6.4
>
>
> HBASE-29398 introduced ThreadLocalServerSideScanMetrics to capture multiple
> scan metrics to capture very low level metrics. The change ended up making
> region scanner stateful and in coproc hooks it can happen that original
> scanner is closed rather a new region scanner is opened thus, we will lose
> the state/scan metrics stored in RegionScanner. The proposal is to refactor
> to make RegionScanner non stateful again and make
> ThreadLocalServerSideScanMetrics LimitedPrivate to consume in coproc hooks.
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