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https://issues.apache.org/jira/browse/HBASE-13421?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Lawlor updated HBASE-13421:
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Attachment: HBASE-13421-v2.patch
Updated patch to address checkstyle and javadoc warnings.
The failing test (TestFastFail) passed locally so may have just been flaky,
retry.
> Reduce the number of object creations introduced by HBASE-11544 in scan RPC
> hot code paths
> ------------------------------------------------------------------------------------------
>
> Key: HBASE-13421
> URL: https://issues.apache.org/jira/browse/HBASE-13421
> Project: HBase
> Issue Type: Sub-task
> Reporter: Jonathan Lawlor
> Assignee: Jonathan Lawlor
> Fix For: 2.0.0, 1.1.0
>
> Attachments: HBASE-13421-v1.patch, HBASE-13421-v2.patch
>
>
> HBASE-11544 made NextState the new return type of RegionScanner#nextRaw
> InternalScanner#next to allow state information to be passed back from a
> scanner (it was formerly a boolean indicating whether or not more values
> existed). The change in this return type led to an increased amount of
> objects being created... In the case that a scan spanned millions of rows,
> there was the potential for millions of object to be created.
> This issue looks to reduce the large amount of object creations from
> potentially many to at most one per RPC request.
> Please see the tail of the parent issue for relevant discussion on the design
> decisions related to this solution. This sub-task has been filed as it seems
> more appropriate to address the fix here rather than as an addendum to the
> parent.
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