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From "Hadoop QA (Jira)" <j...@apache.org>
Subject [jira] [Commented] (TEZ-4130) Config for hard limiting the number of splits
Date Mon, 25 Jan 2021 17:13:00 GMT

    [ https://issues.apache.org/jira/browse/TEZ-4130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17271541#comment-17271541
] 

Hadoop QA commented on TEZ-4130:
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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}  1m 56s{color} | {color:blue}
Docker mode activated. {color} |
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} dupname {color} | {color:green}  0m  0s{color} |
{color:green} No case conflicting files found. {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:red}-1{color} | {color:red} test4tests {color} | {color:red}  0m  0s{color} | {color:red}
The patch doesn't appear to include any new or modified tests. Please justify why no new tests
are needed for this patch. Also please list what manual steps were performed to verify this
patch. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  5m 51s{color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 22s{color} |
{color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 22s{color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 26s{color} |
{color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} spotbugs {color} | {color:blue}  0m 55s{color} | {color:blue}
Used deprecated FindBugs config; considering switching to SpotBugs. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  0m 51s{color} |
{color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 14s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 13s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 13s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 11s{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} javadoc {color} | {color:green}  0m 15s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  0m 44s{color} |
{color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  1m 11s{color} | {color:green}
tez-mapreduce in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m  9s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 13m 38s{color} | {color:black}
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/89/artifact/out/Dockerfile
|
| JIRA Issue | TEZ-4130 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/12997601/TEZ-4130.02.patch
|
| Optional Tests | dupname asflicense javac javadoc unit spotbugs findbugs checkstyle compile
|
| uname | Linux 6964e6f4a189 4.15.0-128-generic #131-Ubuntu SMP Wed Dec 9 06:57:35 UTC 2020
x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | personality/tez.sh |
| git revision | master / 7c71780ae |
| Default Java | Private Build-1.8.0_275-8u275-b01-0ubuntu1~18.04-b01 |
|  Test Results | https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/89/testReport/ |
| Max. process+thread count | 215 (vs. ulimit of 5500) |
| modules | C: tez-mapreduce U: tez-mapreduce |
| Console output | https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/89/console |
| versions | git=2.17.1 maven=3.6.0 findbugs=3.0.1 |
| Powered by | Apache Yetus 0.12.0 https://yetus.apache.org |


This message was automatically generated.



> Config for hard limiting the number of splits
> ---------------------------------------------
>
>                 Key: TEZ-4130
>                 URL: https://issues.apache.org/jira/browse/TEZ-4130
>             Project: Apache Tez
>          Issue Type: Improvement
>            Reporter: László Bodor
>            Assignee: László Bodor
>            Priority: Major
>         Attachments: TEZ-4130.01.patch, TEZ-4130.02.patch
>
>
> During the investigation of a customer issue, I found that tez generated a dag plan containing
>4k tasks. It failed for hive because of bucket number limitations (4k). It can be configured
properly, e.g. bigger splits (tez.grouping.min-size), but maybe it would be more convenient
for users to config a hard limit for the number of splits.



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