[jira] [Commented] (YARN-8807) FairScheduler crashes RM with oversubscription turned on if an application is killed.

2018-10-09 Thread Haibo Chen (JIRA)


[ 
https://issues.apache.org/jira/browse/YARN-8807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16644132#comment-16644132
 ] 

Haibo Chen commented on YARN-8807:
--

Thanks [~rkanter], and [~zsiegl] for the review!

> FairScheduler crashes RM with oversubscription turned on if an application is 
> killed.
> -
>
> Key: YARN-8807
> URL: https://issues.apache.org/jira/browse/YARN-8807
> Project: Hadoop YARN
>  Issue Type: Sub-task
>  Components: fairscheduler, resourcemanager
>Affects Versions: YARN-1011
>Reporter: Haibo Chen
>Assignee: Haibo Chen
>Priority: Major
> Fix For: YARN-1011
>
> Attachments: YARN-8807-YARN-1011.00.patch, 
> YARN-8807-YARN-1011.01.patch
>
>
> When an application, that has got opportunistic containers allocated, is 
> killed, its containers are not released immediately.
> Fair scheduler would therefore continue to try to promote such orphaned 
> containers, which results in NPE.
> {code:java}
> java.lang.NullPointerException
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptToAssignReservedResourcesOrPromoteOpportunisticContainers(FairScheduler.java:1158)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptScheduling(FairScheduler.java:1129)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.nodeUpdate(FairScheduler.java:1001)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:1275)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairScheduler.testKillingApplicationWithOpportunisticContainersAssigned(TestFairScheduler.java:4019){code}



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[jira] [Commented] (YARN-8807) FairScheduler crashes RM with oversubscription turned on if an application is killed.

2018-10-09 Thread Robert Kanter (JIRA)


[ 
https://issues.apache.org/jira/browse/YARN-8807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16644094#comment-16644094
 ] 

Robert Kanter commented on YARN-8807:
-

+1 LGTM

> FairScheduler crashes RM with oversubscription turned on if an application is 
> killed.
> -
>
> Key: YARN-8807
> URL: https://issues.apache.org/jira/browse/YARN-8807
> Project: Hadoop YARN
>  Issue Type: Sub-task
>  Components: fairscheduler, resourcemanager
>Affects Versions: YARN-1011
>Reporter: Haibo Chen
>Assignee: Haibo Chen
>Priority: Major
> Attachments: YARN-8807-YARN-1011.00.patch, 
> YARN-8807-YARN-1011.01.patch
>
>
> When an application, that has got opportunistic containers allocated, is 
> killed, its containers are not released immediately.
> Fair scheduler would therefore continue to try to promote such orphaned 
> containers, which results in NPE.
> {code:java}
> java.lang.NullPointerException
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptToAssignReservedResourcesOrPromoteOpportunisticContainers(FairScheduler.java:1158)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptScheduling(FairScheduler.java:1129)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.nodeUpdate(FairScheduler.java:1001)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:1275)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairScheduler.testKillingApplicationWithOpportunisticContainersAssigned(TestFairScheduler.java:4019){code}



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[jira] [Commented] (YARN-8807) FairScheduler crashes RM with oversubscription turned on if an application is killed.

2018-10-09 Thread Haibo Chen (JIRA)


[ 
https://issues.apache.org/jira/browse/YARN-8807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16643638#comment-16643638
 ] 

Haibo Chen commented on YARN-8807:
--

The unit test failures are all unrelated.

> FairScheduler crashes RM with oversubscription turned on if an application is 
> killed.
> -
>
> Key: YARN-8807
> URL: https://issues.apache.org/jira/browse/YARN-8807
> Project: Hadoop YARN
>  Issue Type: Sub-task
>  Components: fairscheduler, resourcemanager
>Affects Versions: YARN-1011
>Reporter: Haibo Chen
>Assignee: Haibo Chen
>Priority: Major
> Attachments: YARN-8807-YARN-1011.00.patch, 
> YARN-8807-YARN-1011.01.patch
>
>
> When an application, that has got opportunistic containers allocated, is 
> killed, its containers are not released immediately.
> Fair scheduler would therefore continue to try to promote such orphaned 
> containers, which results in NPE.
> {code:java}
> java.lang.NullPointerException
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptToAssignReservedResourcesOrPromoteOpportunisticContainers(FairScheduler.java:1158)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptScheduling(FairScheduler.java:1129)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.nodeUpdate(FairScheduler.java:1001)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:1275)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairScheduler.testKillingApplicationWithOpportunisticContainersAssigned(TestFairScheduler.java:4019){code}



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[jira] [Commented] (YARN-8807) FairScheduler crashes RM with oversubscription turned on if an application is killed.

2018-10-08 Thread Hadoop QA (JIRA)


[ 
https://issues.apache.org/jira/browse/YARN-8807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16642705#comment-16642705
 ] 

Hadoop QA commented on YARN-8807:
-

| (x) *{color:red}-1 overall{color}* |
\\
\\
|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  0m 
20s{color} | {color:blue} Docker mode activated. {color} |
|| || || || {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: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} YARN-1011 Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 23m 
41s{color} | {color:green} YARN-1011 passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
46s{color} | {color:green} YARN-1011 passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
44s{color} | {color:green} YARN-1011 passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
47s{color} | {color:green} YARN-1011 passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
12m 53s{color} | {color:green} branch has no errors when building and testing 
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
18s{color} | {color:green} YARN-1011 passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
33s{color} | {color:green} YARN-1011 passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
47s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
42s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
42s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
37s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
48s{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} shadedclient {color} | {color:green} 
12m 27s{color} | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
25s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
28s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 78m  2s{color} 
| {color:red} hadoop-yarn-server-resourcemanager in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  1m 
17s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}137m 10s{color} | 
{color:black} {color} |
\\
\\
|| Reason || Tests ||
| Failed junit tests | 
hadoop.yarn.server.resourcemanager.TestApplicationMasterService |
|   | 
hadoop.yarn.server.resourcemanager.metrics.TestCombinedSystemMetricsPublisher |
\\
\\
|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:4b8c2b1 |
| JIRA Issue | YARN-8807 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12942929/YARN-8807-YARN-1011.01.patch
 |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 81b730c69666 3.13.0-143-generic #192-Ubuntu SMP Tue Feb 27 
10:45:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | YARN-1011 / efd8524 |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_181 |
| findbugs | v3.1.0-RC1 |
| unit | 
https://builds.apache.org/job/PreCommit-YARN-Build/22106/artifact/out/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/22106/testReport/ |
| Max. process+thread count | 982 (vs. ulimit of 1) |
| modu

[jira] [Commented] (YARN-8807) FairScheduler crashes RM with oversubscription turned on if an application is killed.

2018-10-08 Thread Haibo Chen (JIRA)


[ 
https://issues.apache.org/jira/browse/YARN-8807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16642621#comment-16642621
 ] 

Haibo Chen commented on YARN-8807:
--

Thanks for the review, [~rkanter]. I updated the patch to fix the compilation 
issue.

> FairScheduler crashes RM with oversubscription turned on if an application is 
> killed.
> -
>
> Key: YARN-8807
> URL: https://issues.apache.org/jira/browse/YARN-8807
> Project: Hadoop YARN
>  Issue Type: Sub-task
>  Components: fairscheduler, resourcemanager
>Affects Versions: YARN-1011
>Reporter: Haibo Chen
>Assignee: Haibo Chen
>Priority: Major
> Attachments: YARN-8807-YARN-1011.00.patch, 
> YARN-8807-YARN-1011.01.patch
>
>
> When an application, that has got opportunistic containers allocated, is 
> killed, its containers are not released immediately.
> Fair scheduler would therefore continue to try to promote such orphaned 
> containers, which results in NPE.
> {code:java}
> java.lang.NullPointerException
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptToAssignReservedResourcesOrPromoteOpportunisticContainers(FairScheduler.java:1158)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptScheduling(FairScheduler.java:1129)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.nodeUpdate(FairScheduler.java:1001)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:1275)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairScheduler.testKillingApplicationWithOpportunisticContainersAssigned(TestFairScheduler.java:4019){code}



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[jira] [Commented] (YARN-8807) FairScheduler crashes RM with oversubscription turned on if an application is killed.

2018-10-08 Thread Robert Kanter (JIRA)


[ 
https://issues.apache.org/jira/browse/YARN-8807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16642549#comment-16642549
 ] 

Robert Kanter commented on YARN-8807:
-

Looks good to me, though something must have changed since the patch was 
created because it doesn't compile anymore.

> FairScheduler crashes RM with oversubscription turned on if an application is 
> killed.
> -
>
> Key: YARN-8807
> URL: https://issues.apache.org/jira/browse/YARN-8807
> Project: Hadoop YARN
>  Issue Type: Sub-task
>  Components: fairscheduler, resourcemanager
>Affects Versions: YARN-1011
>Reporter: Haibo Chen
>Assignee: Haibo Chen
>Priority: Major
> Attachments: YARN-8807-YARN-1011.00.patch
>
>
> When an application, that has got opportunistic containers allocated, is 
> killed, its containers are not released immediately.
> Fair scheduler would therefore continue to try to promote such orphaned 
> containers, which results in NPE.
> {code:java}
> java.lang.NullPointerException
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptToAssignReservedResourcesOrPromoteOpportunisticContainers(FairScheduler.java:1158)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptScheduling(FairScheduler.java:1129)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.nodeUpdate(FairScheduler.java:1001)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:1275)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairScheduler.testKillingApplicationWithOpportunisticContainersAssigned(TestFairScheduler.java:4019){code}



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[jira] [Commented] (YARN-8807) FairScheduler crashes RM with oversubscription turned on if an application is killed.

2018-10-02 Thread Zoltan Siegl (JIRA)


[ 
https://issues.apache.org/jira/browse/YARN-8807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16636081#comment-16636081
 ] 

Zoltan Siegl commented on YARN-8807:


[~haibochen] thank you for the patch!
LGTM +1 (Non-binding)

> FairScheduler crashes RM with oversubscription turned on if an application is 
> killed.
> -
>
> Key: YARN-8807
> URL: https://issues.apache.org/jira/browse/YARN-8807
> Project: Hadoop YARN
>  Issue Type: Sub-task
>  Components: fairscheduler, resourcemanager
>Affects Versions: YARN-1011
>Reporter: Haibo Chen
>Assignee: Haibo Chen
>Priority: Major
> Attachments: YARN-8807-YARN-1011.00.patch
>
>
> When an application, that has got opportunistic containers allocated, is 
> killed, its containers are not released immediately.
> Fair scheduler would therefore continue to try to promote such orphaned 
> containers, which results in NPE.
> {code:java}
> java.lang.NullPointerException
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptToAssignReservedResourcesOrPromoteOpportunisticContainers(FairScheduler.java:1158)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptScheduling(FairScheduler.java:1129)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.nodeUpdate(FairScheduler.java:1001)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:1275)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairScheduler.testKillingApplicationWithOpportunisticContainersAssigned(TestFairScheduler.java:4019){code}



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[jira] [Commented] (YARN-8807) FairScheduler crashes RM with oversubscription turned on if an application is killed.

2018-09-21 Thread Haibo Chen (JIRA)


[ 
https://issues.apache.org/jira/browse/YARN-8807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16623809#comment-16623809
 ] 

Haibo Chen commented on YARN-8807:
--

The unit test failure TestCapacityOverTimePolicy.testAllocation, is unrelated 
to this patch.

> FairScheduler crashes RM with oversubscription turned on if an application is 
> killed.
> -
>
> Key: YARN-8807
> URL: https://issues.apache.org/jira/browse/YARN-8807
> Project: Hadoop YARN
>  Issue Type: Sub-task
>  Components: fairscheduler, resourcemanager
>Affects Versions: YARN-1011
>Reporter: Haibo Chen
>Assignee: Haibo Chen
>Priority: Major
> Attachments: YARN-8807-YARN-1011.00.patch
>
>
> When an application, that has got opportunistic containers allocated, is 
> killed, its containers are not released immediately.
> Fair scheduler would therefore continue to try to promote such orphaned 
> containers, which results in NPE.
> {code:java}
> java.lang.NullPointerException
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptToAssignReservedResourcesOrPromoteOpportunisticContainers(FairScheduler.java:1158)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.attemptScheduling(FairScheduler.java:1129)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.nodeUpdate(FairScheduler.java:1001)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler.handle(FairScheduler.java:1275)
>     at 
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairScheduler.testKillingApplicationWithOpportunisticContainersAssigned(TestFairScheduler.java:4019){code}



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[jira] [Commented] (YARN-8807) FairScheduler crashes RM with oversubscription turned on if an application is killed.

2018-09-20 Thread Hadoop QA (JIRA)


[ 
https://issues.apache.org/jira/browse/YARN-8807?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16622900#comment-16622900
 ] 

Hadoop QA commented on YARN-8807:
-

| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
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|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  
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| {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} YARN-1011 Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 28m 
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| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
48s{color} | {color:green} YARN-1011 passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
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| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
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| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
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|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
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| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
39s{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} shadedclient {color} | {color:green} 
10m 19s{color} | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
17s{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
24s{color} | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 69m 25s{color} 
| {color:red} hadoop-yarn-server-resourcemanager in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
23s{color} | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}143m 48s{color} | 
{color:black} {color} |
\\
\\
|| Reason || Tests ||
| Failed junit tests | 
hadoop.yarn.server.resourcemanager.reservation.TestCapacityOverTimePolicy |
\\
\\
|| Subsystem || Report/Notes ||
| Docker | Client=17.05.0-ce Server=17.05.0-ce Image:yetus/hadoop:c6870a1 |
| JIRA Issue | YARN-8807 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/12940672/YARN-8807-YARN-1011.00.patch
 |
| Optional Tests |  dupname  asflicense  compile  javac  javadoc  mvninstall  
mvnsite  unit  shadedclient  findbugs  checkstyle  |
| uname | Linux 2a50a3f8f61e 4.4.0-133-generic #159-Ubuntu SMP Fri Aug 10 
07:31:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /testptch/patchprocess/precommit/personality/provided.sh |
| git revision | YARN-1011 / 36ec27e |
| maven | version: Apache Maven 3.3.9 |
| Default Java | 1.8.0_181 |
| findbugs | v3.1.0-RC1 |
| unit | 
https://builds.apache.org/job/PreCommit-YARN-Build/21916/artifact/out/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt
 |
|  Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/21916/testReport/ |
| Max. process+thread count | 1048 (vs. ulimit of 1) |
| modules | C: 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-serv