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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18665) ReversedScannerCallable invokes getRegionLocations incorrectly
Date Fri, 25 Aug 2017 12:02:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16141521#comment-16141521
] 

Hadoop QA commented on HBASE-18665:
-----------------------------------

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| {color:green}+1{color} | {color:green} hbaseanti {color} | {color:green}  0m  0s{color}
| {color:green} Patch does not have any anti-patterns. {color} |
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| {color:green} The patch appears to include 1 new or modified test files. {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  3m 34s{color}
| {color:green} master passed {color} |
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the patch passed {color} |
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| {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green} 38m 42s{color}
| {color:green} Patch does not cause any errors with Hadoop 2.6.1 2.6.2 2.6.3 2.6.4 2.6.5
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hbase-client in the patch passed. {color} |
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| {color:black}{color} | {color:black} {color} | {color:black} 50m 44s{color} | {color:black}
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|| Subsystem || Report/Notes ||
| Docker | Client=1.12.3 Server=1.12.3 Image:yetus/hbase:bdc94b1 |
| JIRA Issue | HBASE-18665 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12883704/HBASE-18665.master.002.patch
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| Optional Tests |  asflicense  javac  javadoc  unit  findbugs  hadoopcheck  hbaseanti  checkstyle
 compile  |
| uname | Linux 6e1ddade956c 3.13.0-119-generic #166-Ubuntu SMP Wed May 3 12:18:55 UTC 2017
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/component/dev-support/hbase-personality.sh
|
| git revision | master / 158f3da |
| Default Java | 1.8.0_144 |
| findbugs | v3.1.0-RC3 |
|  Test Results | https://builds.apache.org/job/PreCommit-HBASE-Build/8302/testReport/ |
| modules | C: hbase-client U: hbase-client |
| Console output | https://builds.apache.org/job/PreCommit-HBASE-Build/8302/console |
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This message was automatically generated.



> ReversedScannerCallable invokes getRegionLocations incorrectly
> --------------------------------------------------------------
>
>                 Key: HBASE-18665
>                 URL: https://issues.apache.org/jira/browse/HBASE-18665
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 2.0.0, 3.0.0, 1.4.0, 1.3.2, 1.5.0, 1.2.7, 1.1.13
>            Reporter: Peter Somogyi
>            Assignee: Peter Somogyi
>         Attachments: HBASE-18665.master.001.patch, HBASE-18665.master.002.patch
>
>
> The behavior of ReversedScannerCallable#prepare [1] and ScannerCallable#prepare [2] methods
differ how they call RpcRetryingCallerWithReadReplicas.getRegionLocations method.
> The reversed scanner uses the 'reload' parameter directly as the first argument - RpcRetryingCallerWithReadReplicas.getRegionLocations(reload,
id, getConnection(), getTableName(), getRow()) - however, the forward scanner passes '!reload'.
The getRegionLocations first parameter is 'useCache', the way we use it in ScannerCallable
is the correct one.
> The same call can be found in ReversedScannerCallable#locateRegionsInRange [3] also without
negating its value.
> [1] https://github.com/apache/hbase/blob/master/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ReversedScannerCallable.java#L89-L90
> [2] https://github.com/apache/hbase/blob/master/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ScannerCallable.java#L139-L140
> [3] https://github.com/apache/hbase/blob/master/hbase-client/src/main/java/org/apache/hadoop/hbase/client/ReversedScannerCallable.java#L143-L144



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