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https://issues.apache.org/jira/browse/TEZ-4301?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17319090#comment-17319090
 ] 

Hadoop QA commented on TEZ-4301:
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| (/) *{color:green}+1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 12m 
14s{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:green}+1{color} | {color:green} test4tests {color} | {color:green}  0m 
 0s{color} | {color:green} The patch appears to include 1 new or modified test 
files. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 12m 
10s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
31s{color} | {color:green} master passed with JDK Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
34s{color} | {color:green} master passed with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
14s{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
39s{color} | {color:green} master passed with JDK Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
31s{color} | {color:green} master passed with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 {color} |
| {color:blue}0{color} | {color:blue} spotbugs {color} | {color:blue}  1m 
27s{color} | {color:blue} Used deprecated FindBugs config; considering 
switching to SpotBugs. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
25s{color} | {color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
21s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
17s{color} | {color:green} the patch passed with JDK Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
17s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
21s{color} | {color:green} the patch passed with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
21s{color} | {color:green} the patch passed {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
0m 18s{color} | {color:orange} tez-runtime-library: The patch generated 2 new + 
136 unchanged - 0 fixed = 138 total (was 136) {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 with JDK Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
18s{color} | {color:green} the patch passed with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  0m 
55s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}  5m 
12s{color} | {color:green} tez-runtime-library in the patch passed with JDK 
Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04. {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} 43m 38s{color} | 
{color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/107/artifact/out/Dockerfile
 |
| JIRA Issue | TEZ-4301 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/13023695/TEZ-4301.3.patch |
| Optional Tests | dupname asflicense javac javadoc unit spotbugs findbugs 
checkstyle compile |
| uname | Linux cf91b86ed812 4.15.0-136-generic #140-Ubuntu SMP Thu Jan 28 
05:20:47 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | personality/tez.sh |
| git revision | master / b93464487 |
| Default Java | Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 |
| Multi-JDK versions | /usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 |
| checkstyle | 
https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/107/artifact/out/diff-checkstyle-tez-runtime-library.txt
 |
| JDK Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04  Test Results | 
https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/107/testReport/ |
| Max. process+thread count | 132 (vs. ulimit of 5500) |
| modules | C: tez-runtime-library U: tez-runtime-library |
| Console output | 
https://ci-hadoop.apache.org/job/PreCommit-TEZ-Build/107/console |
| versions | git=2.25.1 maven=3.6.3 findbugs=3.0.1 |
| Powered by | Apache Yetus 0.12.0 https://yetus.apache.org |


This message was automatically generated.



> TezChlid OOM cause PipelineSorter may create too many sort span
> ---------------------------------------------------------------
>
>                 Key: TEZ-4301
>                 URL: https://issues.apache.org/jira/browse/TEZ-4301
>             Project: Apache Tez
>          Issue Type: Bug
>    Affects Versions: 0.9.0, 0.9.2
>         Environment: 
>            Reporter: CruiseCheung
>            Priority: Minor
>         Attachments: TEZ-4301.1.patch, TEZ-4301.2.patch, TEZ-4301.3.patch
>
>
> When previous span perItem is  much large than others, reserved.remaining() 
> is large。This  may create too many min sort span,cause now we use perItem 
> length to deduce next sort span's metaSize. In production,  we may have 1 
> million  sort span !
>  
> Previous sort span:
> [TezChild] |impl.PipelinedSorter|: Reducer 24: 
> reserved.remaining()=965738496, reserved.metasize=16777216
> [TezChild] |impl.PipelinedSorter|: Reducer 24: Span0.length = 677, perItem = 
> 1400122
> [TezChild] |impl.PipelinedSorter|: Reducer 24: done sorting span=0, 
> length=677, time=0
> [TezChild] |impl.PipelinedSorter|: Reducer 24: Heap = SpanIterator<0:676> 
> (span=Span[16777216,947882594]),
> [TezChild] |impl.PipelinedSorter|: Reducer 24: Span131.length = 1, perItem = 
> 442
> [TezChild] |impl.PipelinedSorter|: Reducer 24: 
> reserved.remaining()=276247288, reserved.metasize=16
> [TezChild] |impl.PipelinedSorter|: Reducer 24: New Span132.length = 1, 
> perItem = 442, counter:533341
>  [TezChild] |impl.PipelinedSorter|: Reducer 24: Span132.length = 1, perItem = 
> 416
>  [TezChild] |impl.PipelinedSorter|: Reducer 24: 
> reserved.remaining()=276246856, reserved.metasize=16
>  [TezChild] |impl.PipelinedSorter|: Reducer 24: New Span133.length = 1, 
> perItem = 416, counter:533342
>  



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