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https://issues.apache.org/jira/browse/HBASE-20056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16379833#comment-16379833
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Hadoop QA commented on HBASE-20056:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m
0s{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 3s{color}
| {color:red} HBASE-20056 does not apply to master. Rebase required? Wrong
Branch? See https://yetus.apache.org/documentation/0.7.0/precommit-patchnames
for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Issue | HBASE-20056 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12912382/HBASE-20056-barnch-1.2-v1.patch
|
| Console output |
https://builds.apache.org/job/PreCommit-HBASE-Build/11719/console |
| Powered by | Apache Yetus 0.7.0 http://yetus.apache.org |
This message was automatically generated.
> Performance optimization on MultiTableInputFormatBase#getSplits()
> ------------------------------------------------------------------
>
> Key: HBASE-20056
> URL: https://issues.apache.org/jira/browse/HBASE-20056
> Project: HBase
> Issue Type: Bug
> Components: hbase, mapreduce
> Affects Versions: 1.0.1, 1.3.1, 1.2.6
> Reporter: ShivaKumar SS
> Assignee: Yechao Chen
> Priority: Minor
> Labels: hbase, mapreduce, performance
> Attachments: HBASE-20056-barnch-1.2-v1.patch
>
>
> Currently this method iterates the List of scan objects to get splits and for
> each iteration it opens the HConnection object and closes it, which is heavy.
> It can be optimized such that a single Hconnection can be used to compute all
> the splits of for all the scan objects for their splits computation.
> This optimization will help in reducing the launch time for MR Job.
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