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Posted to dev@hbase.apache.org by "Viraj Jasani (Jira)" <ji...@apache.org> on 2020/09/15 11:38:00 UTC
[jira] [Reopened] (HBASE-24831) Avoid invoke Counter using
reflection in SnapshotInputFormat
[ https://issues.apache.org/jira/browse/HBASE-24831?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Viraj Jasani reopened HBASE-24831:
----------------------------------
Reopening since this is breaking source compatibility by removing protected methods of IA.Public org.apache.hadoop.hbase.mapreduce.TableRecordReaderImpl.
Checked PR discussion but compatibility is not mentioned. Maybe an oversight?
> Avoid invoke Counter using reflection in SnapshotInputFormat
> -------------------------------------------------------------
>
> Key: HBASE-24831
> URL: https://issues.apache.org/jira/browse/HBASE-24831
> Project: HBase
> Issue Type: Improvement
> Reporter: Yechao Chen
> Assignee: Yechao Chen
> Priority: Major
> Labels: Performance, mapreduce, snapshot
> Fix For: 3.0.0-alpha-1, 2.4.0, 2.3.2
>
>
> In TableRecordReaderImpl we invoke Counter increment by reflection
> This will be called nextKeyValue() in TableSnapshotInputFormat
> reflection invoke is very slower than normal method call
> we can avoid these to improve the read performance
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