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From "Hive QA (Jira)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-22501) Stats reported multiple times during MR execution for UNION queries
Date Sat, 16 Nov 2019 00:34:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-22501?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16975493#comment-16975493
] 

Hive QA commented on HIVE-22501:
--------------------------------

| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  0s{color} |
{color:green} The patch does not contain any @author tags. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  9m 32s{color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m 10s{color} |
{color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 42s{color}
| {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  4m 10s{color} | {color:blue}
ql in master has 1544 extant Findbugs warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  3s{color} |
{color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 30s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  9s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m  9s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 41s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m  0s{color}
| {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  4m 21s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m  4s{color} |
{color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 15s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 26m 12s{color} | {color:black}
{color} |
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|| Subsystem || Report/Notes ||
| Optional Tests |  asflicense  javac  javadoc  findbugs  checkstyle  compile  |
| uname | Linux hiveptest-server-upstream 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u5 (2017-09-19)
x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /data/hiveptest/working/yetus_PreCommit-HIVE-Build-19446/dev-support/hive-personality.sh
|
| git revision | master / 078182a |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.1 |
| modules | C: ql U: ql |
| Console output | http://104.198.109.242/logs//PreCommit-HIVE-Build-19446/yetus.txt |
| Powered by | Apache Yetus    http://yetus.apache.org |


This message was automatically generated.



> Stats reported multiple times during MR execution for UNION queries
> -------------------------------------------------------------------
>
>                 Key: HIVE-22501
>                 URL: https://issues.apache.org/jira/browse/HIVE-22501
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Daniel Voros
>            Assignee: Daniel Voros
>            Priority: Major
>              Labels: mapreduce
>         Attachments: HIVE-22501.1.patch
>
>
> Take the following example:
> {code}
> set hive.execution.engine=mr;
> create table tb(id string) stored as orc;
> insert into tb values('1');
> create table tb2 like tb stored as orc;
> insert into tb2 select * from tb union all select * from tb;
> {code}
> Last insert results in 2 records in the table, but {{TOTAL_TABLE_ROWS_WRITTEN}} statistic
(and number of affected rows on the consolse) is 4.
> We seem to traverse the operator graph multiple times starting from every TS operator
and increment the counters every time we hit the FS operator. UNION-ing the table 3 times
results in 9 TOTAL_TABLE_ROWS_WRITTEN.



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