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https://issues.apache.org/jira/browse/YARN-10467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17221175#comment-17221175
 ] 

Hadoop QA commented on YARN-10467:
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|| Vote || Subsystem || Runtime ||  Logfile || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  1m 
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} trunk Compile Tests {color} || ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 21m 
58s{color} |  | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  
2s{color} |  | {color:green} trunk passed with JDK 
Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
48s{color} |  | {color:green} trunk passed with JDK Private 
Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 
36s{color} |  | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
53s{color} |  | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
17m 45s{color} |  | {color:green} branch has no errors when building and 
testing our client artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
39s{color} |  | {color:green} trunk passed with JDK 
Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
35s{color} |  | {color:green} trunk passed with JDK Private 
Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 {color} |
| {color:blue}0{color} | {color:blue} spotbugs {color} | {color:blue}  1m 
47s{color} |  | {color:blue} Used deprecated FindBugs config; considering 
switching to SpotBugs. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
45s{color} |  | {color:green} trunk passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} || ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  0m 
49s{color} |  | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
54s{color} |  | {color:green} the patch passed with JDK 
Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
54s{color} |  | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  0m 
44s{color} |  | {color:green} the patch passed with JDK Private 
Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  0m 
44s{color} |  | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} blanks {color} | {color:green}  0m  
0s{color} |  | {color:green} The patch has no blanks issues. {color} |
| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
0m 31s{color} | 
[/results-checkstyle-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt|https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/253/artifact/out/results-checkstyle-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt]
 | {color:orange} 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager:
 The patch generated 3 new + 209 unchanged - 0 fixed = 212 total (was 209) 
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| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  0m 
49s{color} |  | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
18m  1s{color} |  | {color:green} patch has no errors when building and testing 
our client artifacts. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
36s{color} |  | {color:green} the patch passed with JDK 
Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 
32s{color} |  | {color:green} the patch passed with JDK Private 
Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  1m 
52s{color} |  | {color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} || ||
| {color:green}+1{color} | {color:green} unit {color} | {color:green}108m 
15s{color} |  | {color:green} hadoop-yarn-server-resourcemanager in the patch 
passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
28s{color} |  | {color:green} The patch does not generate ASF License warnings. 
{color} |
| {color:black}{color} | {color:black} {color} | {color:black}179m 12s{color} | 
 | {color:black}{color} |
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.40 ServerAPI=1.40 base: 
https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/253/artifact/out/Dockerfile
 |
| JIRA Issue | YARN-10467 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/13014166/YARN-10467.00.patch |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite 
unit shadedclient findbugs checkstyle |
| uname | Linux 1b09290a3c31 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 
23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | personality/hadoop.sh |
| git revision | trunk / 15a5f5367366fdd76933d0ff6499363fcbc8873e |
| Default Java | Private Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 |
| Multi-JDK versions | 
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.8+10-post-Ubuntu-0ubuntu118.04.1 
/usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_265-8u265-b01-0ubuntu2~18.04-b01 |
|  Test Results | 
https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/253/testReport/ |
| Max. process+thread count | 820 (vs. ulimit of 5500) |
| modules | C: 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
 U: 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
 |
| Console output | 
https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/253/console |
| versions | git=2.17.1 maven=3.6.0 findbugs=4.1.3 |
| Powered by | Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org |


This message was automatically generated.



> ContainerIdPBImpl objects can be leaked in RMNodeImpl.completedContainers
> -------------------------------------------------------------------------
>
>                 Key: YARN-10467
>                 URL: https://issues.apache.org/jira/browse/YARN-10467
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.10.0
>            Reporter: Haibo Chen
>            Assignee: Haibo Chen
>            Priority: Major
>             Fix For: 2.10.2
>
>         Attachments: YARN-10467.00.patch, YARN-10467.branch-2.10.00.patch
>
>
> In one of our recent heap analysis, we found that the majority of the heap is 
> occupied by {{RMNodeImpl.completedContainers}}<ContainerIdPBImp>, which 
> accounts for 19GB, out of 24.3 GB.  There are over 86 million 
> ContainerIdPBImpl objects, in contrast, only 161,601 RMContainerImpl objects 
> which represent the # of active containers that RM is still tracking.  
> Inspecting some ContainerIdPBImpl objects, they belong to applications that 
> have long finished. This indicates some sort of memory leak of 
> ContainerIdPBImpl objects in RMNodeImpl.
>  
> Right now, when a container is reported by a NM as completed, it is 
> immediately added to RMNodeImpl.completedContainers and later cleaned up 
> after the AM has been notified of its completion in the AM-RM heartbeat. The 
> cleanup can be broken into a few steps.
>  * Step 1:  the completed container is first added to 
> RMAppAttemptImpl.justFinishedContainers (this is asynchronous to being added 
> to {{RMNodeImpl.completedContainers}}).
>  * Step 2: During the heartbeat AM-RM heartbeat, the container is removed 
> from RMAppAttemptImpl.justFinishedContainers and added to 
> RMAppAttemptImpl.finishedContainersSentToAM
> Once a completed container gets added to 
> RMAppAttemptImpl.finishedContainersSentToAM, it is guaranteed to be cleaned 
> up from {{RMNodeImpl.completedContainers}}
>  
> However, if the AM exits (regardless of failure or success) before some 
> recently completed containers can be added to  
> RMAppAttemptImpl.finishedContainersSentToAM in previous heartbeats, there 
> won’t be any future AM-RM heartbeat to perform aforementioned step 2. Hence, 
> these objects stay in RMNodeImpl.completedContainers forever.
> We have observed in MR that AMs can decide to exit upon success of all it 
> tasks without waiting for notification of the completion of every container, 
> or AM may just die suddenly (e.g. OOM).  Spark and other framework may just 
> be similar.



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