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https://issues.apache.org/jira/browse/YARN-11656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17824960#comment-17824960
]
ASF GitHub Bot commented on YARN-11656:
---------------------------------------
hadoop-yetus commented on PR #6569:
URL: https://github.com/apache/hadoop/pull/6569#issuecomment-1986880158
:confetti_ball: **+1 overall**
| Vote | Subsystem | Runtime | Logfile | Comment |
|:----:|----------:|--------:|:--------:|:-------:|
| +0 :ok: | reexec | 0m 50s | | Docker mode activated. |
|||| _ Prechecks _ |
| +1 :green_heart: | dupname | 0m 0s | | No case conflicting files
found. |
| +0 :ok: | codespell | 0m 1s | | codespell was not available. |
| +0 :ok: | detsecrets | 0m 1s | | detect-secrets was not available.
|
| +1 :green_heart: | @author | 0m 0s | | The patch does not contain
any @author tags. |
| +1 :green_heart: | test4tests | 0m 0s | | The patch appears to
include 8 new or modified test files. |
|||| _ trunk Compile Tests _ |
| +0 :ok: | mvndep | 14m 8s | | Maven dependency ordering for branch |
| +1 :green_heart: | mvninstall | 36m 50s | | trunk passed |
| +1 :green_heart: | compile | 8m 56s | | trunk passed with JDK
Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1 |
| +1 :green_heart: | compile | 7m 41s | | trunk passed with JDK
Private Build-1.8.0_392-8u392-ga-1~20.04-b08 |
| +1 :green_heart: | checkstyle | 2m 8s | | trunk passed |
| +1 :green_heart: | mvnsite | 2m 0s | | trunk passed |
| +1 :green_heart: | javadoc | 2m 3s | | trunk passed with JDK
Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1 |
| +1 :green_heart: | javadoc | 1m 53s | | trunk passed with JDK
Private Build-1.8.0_392-8u392-ga-1~20.04-b08 |
| +1 :green_heart: | spotbugs | 4m 19s | | trunk passed |
| +1 :green_heart: | shadedclient | 40m 11s | | branch has no errors
when building and testing our client artifacts. |
|||| _ Patch Compile Tests _ |
| +0 :ok: | mvndep | 0m 31s | | Maven dependency ordering for patch |
| +1 :green_heart: | mvninstall | 1m 23s | | the patch passed |
| +1 :green_heart: | compile | 8m 3s | | the patch passed with JDK
Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1 |
| +1 :green_heart: | javac | 8m 3s | | the patch passed |
| +1 :green_heart: | compile | 8m 26s | | the patch passed with JDK
Private Build-1.8.0_392-8u392-ga-1~20.04-b08 |
| +1 :green_heart: | javac | 8m 26s | | the patch passed |
| +1 :green_heart: | blanks | 0m 0s | | The patch has no blanks
issues. |
| -0 :warning: | checkstyle | 2m 3s |
[/results-checkstyle-hadoop-yarn-project_hadoop-yarn.txt](https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6569/10/artifact/out/results-checkstyle-hadoop-yarn-project_hadoop-yarn.txt)
| hadoop-yarn-project/hadoop-yarn: The patch generated 20 new + 95 unchanged
- 3 fixed = 115 total (was 98) |
| +1 :green_heart: | mvnsite | 2m 5s | | the patch passed |
| +1 :green_heart: | javadoc | 1m 53s | | the patch passed with JDK
Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1 |
| +1 :green_heart: | javadoc | 1m 59s | | the patch passed with JDK
Private Build-1.8.0_392-8u392-ga-1~20.04-b08 |
| +1 :green_heart: | spotbugs | 4m 33s | | the patch passed |
| +1 :green_heart: | shadedclient | 41m 52s | | patch has no errors
when building and testing our client artifacts. |
|||| _ Other Tests _ |
| +1 :green_heart: | unit | 5m 40s | | hadoop-yarn-common in the patch
passed. |
| +1 :green_heart: | unit | 108m 43s | |
hadoop-yarn-server-resourcemanager in the patch passed. |
| +1 :green_heart: | asflicense | 0m 57s | | The patch does not
generate ASF License warnings. |
| | | 313m 2s | | |
| Subsystem | Report/Notes |
|----------:|:-------------|
| Docker | ClientAPI=1.44 ServerAPI=1.44 base:
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6569/10/artifact/out/Dockerfile
|
| GITHUB PR | https://github.com/apache/hadoop/pull/6569 |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall
mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets |
| uname | Linux 2c6393f94f3c 5.15.0-94-generic #104-Ubuntu SMP Tue Jan 9
15:25:40 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | dev-support/bin/hadoop.sh |
| git revision | trunk / 465a0de4f481ee2dc7383e6fb40b93e32135ba3c |
| Default Java | Private Build-1.8.0_392-8u392-ga-1~20.04-b08 |
| Multi-JDK versions |
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.22+7-post-Ubuntu-0ubuntu220.04.1
/usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_392-8u392-ga-1~20.04-b08 |
| Test Results |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6569/10/testReport/ |
| Max. process+thread count | 1597 (vs. ulimit of 5500) |
| modules | C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
U: hadoop-yarn-project/hadoop-yarn |
| Console output |
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6569/10/console |
| versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
This message was automatically generated.
> RMStateStore event queue blocked
> --------------------------------
>
> Key: YARN-11656
> URL: https://issues.apache.org/jira/browse/YARN-11656
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: yarn
> Affects Versions: 3.4.1
> Reporter: Bence Kosztolnik
> Assignee: Bence Kosztolnik
> Priority: Major
> Labels: pull-request-available
> Attachments: issue.png, log.png
>
>
> h2. Problem statement
>
> I observed Yarn cluster has pending and available resources as well, but the
> cluster utilization is usually around ~50%. The cluster had loaded with 200
> parallel PI example job (from hadoop-mapreduce-examples) with 20 map and 20
> reduce containers configured, on a 50 nodes cluster, where each node had 8
> cores, and a lot of memory (there was cpu bottleneck).
> Finally, I realized the RM had some IO bottleneck and needed 1~20 seconds to
> persist a RMStateStoreEvent (using FileSystemRMStateStore).
> To reduce the impact of the issue:
> - create a dispatcher where events can persist in parallel threads
> - create metric data for the RMStateStore event queue to be able easily to
> identify the problem if occurs on a cluster
> {panel:title=Issue visible on UI2}
> !issue.png|height=250!
> {panel}
> Also another way to identify the issue if we can see too much time is
> required to store info for app after reach new_saving state
> {panel:title=How issue can look like in log}
> !log.png|height=250!
> {panel}
> h2. Solution
> Created a *MultiDispatcher* class which implements the Dispatcher interface.
> The Dispatcher creates a separate metric object called _Event metrics for
> "rm-state-store"_ where we can see
> - how many unhandled events are currently present in the event queue for the
> specific event type
> - how many events were handled for the specific event type
> - average execution time for the specific event
> The dispatcher has the following configs ( the placeholder is for the
> dispatcher name, for example, rm-state-store )
> ||Config name||Description||Default value||
> |yarn.dispatcher.multi-thread.{}.*default-pool-size*|How many parallel
> threads should execute the parallel event execution| 4|
> |yarn.dispatcher.multi-thread.{}.*max-pool-size*|If the event queue is full
> the execution threads will scale up to this many|8|
> |yarn.dispatcher.multi-thread.{}.*keep-alive-seconds*|Execution threads will
> be destroyed after this many seconds|10|
> |yarn.dispatcher.multi-thread.{}.*queue-size*|Size of the eventqueue|1 000
> 000|
> |yarn.dispatcher.multi-thread.{}.*monitor-seconds*|The size of the event
> queue will be logged with this frequency (if not zero) |30|
> |yarn.dispatcher.multi-thread.{}.*graceful-stop-seconds*|After the stop
> signal the dispatcher will wait this many seconds to be able to process the
> incoming events before terminating them|60|
> {panel:title=Example output from RM JMX api}
> {noformat}
> ...
> {
> "name": "Hadoop:service=ResourceManager,name=Event metrics for
> rm-state-store",
> "modelerType": "Event metrics for rm-state-store",
> "tag.Context": "yarn",
> "tag.Hostname": CENSORED
> "RMStateStoreEventType#STORE_APP_ATTEMPT_Current": 51,
> "RMStateStoreEventType#STORE_APP_ATTEMPT_NumOps": 0,
> "RMStateStoreEventType#STORE_APP_ATTEMPT_AvgTime": 0.0,
> "RMStateStoreEventType#STORE_APP_Current": 124,
> "RMStateStoreEventType#STORE_APP_NumOps": 46,
> "RMStateStoreEventType#STORE_APP_AvgTime": 3318.25,
> "RMStateStoreEventType#UPDATE_APP_Current": 31,
> "RMStateStoreEventType#UPDATE_APP_NumOps": 16,
> "RMStateStoreEventType#UPDATE_APP_AvgTime": 2629.6666666666665,
> "RMStateStoreEventType#UPDATE_APP_ATTEMPT_Current": 31,
> "RMStateStoreEventType#UPDATE_APP_ATTEMPT_NumOps": 12,
> "RMStateStoreEventType#UPDATE_APP_ATTEMPT_AvgTime": 2048.6666666666665,
> "RMStateStoreEventType#REMOVE_APP_Current": 12,
> "RMStateStoreEventType#REMOVE_APP_NumOps": 3,
> "RMStateStoreEventType#REMOVE_APP_AvgTime": 1378.0,
> "RMStateStoreEventType#REMOVE_APP_ATTEMPT_Current": 0,
> "RMStateStoreEventType#REMOVE_APP_ATTEMPT_NumOps": 0,
> "RMStateStoreEventType#REMOVE_APP_ATTEMPT_AvgTime": 0.0,
> "RMStateStoreEventType#FENCED_Current": 0,
> "RMStateStoreEventType#FENCED_NumOps": 0,
> "RMStateStoreEventType#FENCED_AvgTime": 0.0,
> "RMStateStoreEventType#STORE_MASTERKEY_Current": 0,
> "RMStateStoreEventType#STORE_MASTERKEY_NumOps": 0,
> "RMStateStoreEventType#STORE_MASTERKEY_AvgTime": 0.0,
> "RMStateStoreEventType#REMOVE_MASTERKEY_Current": 0,
> "RMStateStoreEventType#REMOVE_MASTERKEY_NumOps": 0,
> "RMStateStoreEventType#REMOVE_MASTERKEY_AvgTime": 0.0,
> "RMStateStoreEventType#STORE_DELEGATION_TOKEN_Current": 0,
> "RMStateStoreEventType#STORE_DELEGATION_TOKEN_NumOps": 0,
> "RMStateStoreEventType#STORE_DELEGATION_TOKEN_AvgTime": 0.0,
> "RMStateStoreEventType#REMOVE_DELEGATION_TOKEN_Current": 0,
> "RMStateStoreEventType#REMOVE_DELEGATION_TOKEN_NumOps": 0,
> "RMStateStoreEventType#REMOVE_DELEGATION_TOKEN_AvgTime": 0.0,
> "RMStateStoreEventType#UPDATE_DELEGATION_TOKEN_Current": 0,
> "RMStateStoreEventType#UPDATE_DELEGATION_TOKEN_NumOps": 0,
> "RMStateStoreEventType#UPDATE_DELEGATION_TOKEN_AvgTime": 0.0,
> "RMStateStoreEventType#UPDATE_AMRM_TOKEN_Current": 0,
> "RMStateStoreEventType#UPDATE_AMRM_TOKEN_NumOps": 0,
> "RMStateStoreEventType#UPDATE_AMRM_TOKEN_AvgTime": 0.0,
> "RMStateStoreEventType#STORE_RESERVATION_Current": 0,
> "RMStateStoreEventType#STORE_RESERVATION_NumOps": 0,
> "RMStateStoreEventType#STORE_RESERVATION_AvgTime": 0.0,
> "RMStateStoreEventType#REMOVE_RESERVATION_Current": 0,
> "RMStateStoreEventType#REMOVE_RESERVATION_NumOps": 0,
> "RMStateStoreEventType#REMOVE_RESERVATION_AvgTime": 0.0,
> "RMStateStoreEventType#STORE_PROXY_CA_CERT_Current": 0,
> "RMStateStoreEventType#STORE_PROXY_CA_CERT_NumOps": 0,
> "RMStateStoreEventType#STORE_PROXY_CA_CERT_AvgTime": 0.0
> },
> ...
> {noformat}
> {panel}
> h2. Testing
> I deployed the MultiDispatcher supported version of yarn to the cluster and
> applied the following performance test:
> {code:bash}
> #!/bin/bash
> for i in {1..50};
> do
> ssh root@$i-node-url 'nohup ./perf.sh 4 1>/dev/null 2>/dev/nul &' &
> done
> sleep 300
> for i in {1..50};
> do
> ssh root@$i-node-url "pkill -9 -f perf" &
> done
> sleep 5
> echo "DONE"
> {code}
> Each node had do following perf script
> {code:bash}
> #!/bin/bash
> while true
> do
> if [ $(ps -o pid= -u hadoop | wc -l) -le $1 ]
> then
> hadoop jar /opt/hadoop-mapreduce-examples.jar pi 20 20 1>/dev/null
> 2>&1 &
> fi
> sleep 1
> done
> {code}
> This way in 5 minute (+ wait until all job finish) i could process 332 app.
> After i tested the same with the official build i needed 5 minute only to
> finish with the first app, after that 221 app were finished.
> I also tested it with LeveldbRMStateStore and ZKRMStateStore and did not
> found any problem with the implementation
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