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https://issues.apache.org/jira/browse/MAPREDUCE-6541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15611597#comment-15611597
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Hadoop QA commented on MAPREDUCE-6541:
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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 11s
{color} | {color:blue} Docker mode activated. {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:green}+1{color} | {color:green} mvninstall {color} | {color:green} 6m
42s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 29s
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
18s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 28s
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
16s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 0m
34s {color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 15s
{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 0m
22s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 0m 20s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 0m 20s
{color} | {color:green} the patch passed {color} |
| {color:red}-1{color} | {color:red} checkstyle {color} | {color:red} 0m 15s
{color} | {color:red}
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app:
The patch generated 8 new + 226 unchanged - 0 fixed = 234 total (was 226)
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| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green} 0m 27s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 0m
12s {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} 0m
42s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 0m 13s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 9m 0s
{color} | {color:green} hadoop-mapreduce-client-app in the patch passed.
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| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
15s {color} | {color:green} The patch does not generate ASF License warnings.
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| {color:black}{color} | {color:black} {color} | {color:black} 21m 34s {color}
| {color:black} {color} |
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|| Subsystem || Report/Notes ||
| Docker | Image:yetus/hadoop:9560f25 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12835550/MAPREDUCE-6541.02.patch
|
| JIRA Issue | MAPREDUCE-6541 |
| Optional Tests | asflicense compile javac javadoc mvninstall mvnsite
unit findbugs checkstyle |
| uname | Linux 34acfc665c56 3.13.0-93-generic #140-Ubuntu SMP Mon Jul 18
21:21:05 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/hadoop/patchprocess/precommit/personality/provided.sh
|
| git revision | trunk / 4e403de |
| Default Java | 1.8.0_101 |
| findbugs | v3.0.0 |
| checkstyle |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6780/artifact/patchprocess/diff-checkstyle-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-app.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6780/testReport/ |
| modules | C:
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app U:
hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app |
| Console output |
https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/6780/console |
| Powered by | Apache Yetus 0.3.0 http://yetus.apache.org |
This message was automatically generated.
> Exclude scheduled reducer memory when calculating available mapper slots from
> headroom to avoid deadlock
> ---------------------------------------------------------------------------------------------------------
>
> Key: MAPREDUCE-6541
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6541
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Affects Versions: 2.7.1
> Reporter: Wangda Tan
> Assignee: Varun Saxena
> Attachments: MAPREDUCE-6541.01.patch, MAPREDUCE-6541.02.patch
>
>
> We saw a MR deadlock recently:
> - When NM restarted by framework without enable recovery, containers running
> on these nodes will be identified as "ABORTED", and MR AM will try to
> reschedule "ABORTED" mapper containers.
> - Since such lost mappers are "ABORTED" container, MR AM gives normal mapper
> priority (priority=20) to such mapper requests. If there's any pending
> reducer (priority=10) at the same time, mapper requests need to wait for
> reducer requests satisfied.
> - In our test, one mapper needs 700+ MB, reducer needs 1000+ MB, and RM
> available resource = mapper-request = (700+ MB), only one job was running in
> the system so scheduler cannot allocate more reducer containers AND MR-AM
> thinks there're enough headroom for mapper so reducer containers will not be
> preempted.
> MAPREDUCE-6302 can solve most of the problems, but in the other hand, I think
> we may need to exclude scheduled reducers resource when calculating
> #available-mapper-slots from headroom. Which we can avoid excessive reducer
> preemption.
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