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Posted to yarn-issues@hadoop.apache.org by "Hadoop QA (Jira)" <ji...@apache.org> on 2021/03/26 02:33:00 UTC
[jira] [Commented] (YARN-10705) Misleading DEBUG log for container
assignment needs to be removed when the container is actually reserved, not
assigned in FairScheduler
[ https://issues.apache.org/jira/browse/YARN-10705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17309102#comment-17309102 ]
Hadoop QA commented on YARN-10705:
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/850/artifact/out/Dockerfile |
| JIRA Issue | YARN-10705 |
| JIRA Patch URL | https://issues.apache.org/jira/secure/attachment/13022969/YARN-10705.001.patch |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient findbugs checkstyle spotbugs |
| uname | Linux 7dfcd5fd2cfa 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/hadoop.sh |
| git revision | trunk / 19e418c10d8 |
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| Multi-JDK versions | /usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 |
| Test Results | https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/850/testReport/ |
| Max. process+thread count | 815 (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/850/console |
| versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
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This message was automatically generated.
> Misleading DEBUG log for container assignment needs to be removed when the container is actually reserved, not assigned in FairScheduler
> ----------------------------------------------------------------------------------------------------------------------------------------
>
> Key: YARN-10705
> URL: https://issues.apache.org/jira/browse/YARN-10705
> Project: Hadoop YARN
> Issue Type: Bug
> Components: yarn
> Affects Versions: 3.4.0
> Reporter: Siddharth Ahuja
> Assignee: Siddharth Ahuja
> Priority: Minor
> Attachments: YARN-10705.001.patch
>
>
> Following DEBUG logs are logged if a container reservation is made when a node has been offered to the queue in FairScheduler:
> {code}
> 2021-02-10 07:33:55,049 DEBUG org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSAppAttempt: application_1610442362681_2607's resource request is reserved.
> 2021-02-10 07:33:55,049 DEBUG org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSLeafQueue: Assigned container in queue:root.pj_dc_pe container:<memory:-1, vCores:0>
> {code}
> The latter log from above seems to indicate a bad container assignment with <memory:-1, vCores:0> resource allocation, whereas, in actual, it is a bad log which shouldn't have been logged in the first place.
> This log comes from [1] after an application attempt with an unmet demand is checked for container assignment/reservation.
> If the container for this app attempt is reserved on the node, then, it returns <memory:-1, vCores:0> from [2].
> From [3]:
> {quote}
> * If an assignment was made, returns the resources allocated to the
> * container. If a reservation was made, returns
> * FairScheduler.CONTAINER_RESERVED. If no assignment or reservation was
> * made, returns an empty resource.
> {quote}
> We are checking for the empty resource at [4], but not FairScheduler.CONTAINER_RESERVED before logging out a message for container assignment specifically which is incorrect.
> Instead of:
> {code}
> if (!assigned.equals(none())) {
> LOG.debug("Assigned container in queue:{} container:{}",
> getName(), assigned);
> break;
> }
> {code}
> it should be:
> {code}
> // check if an assignment or a reservation was made.
> if (!assigned.equals(none())) {
> // only log container assignment if there is
> // an actual assignment, not a reservation.
> if (!assigned.equals(FairScheduler.CONTAINER_RESERVED)
> && LOG.isDebugEnabled()) {
> LOG.debug("Assigned container in queue:" + getName() + " " +
> "container:" + assigned);
> }
> break;
> }
> {code}
> [1] https://github.com/apache/hadoop/blob/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSLeafQueue.java#L356
> [2] https://github.com/apache/hadoop/blob/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSAppAttempt.java#L911
> [3] https://github.com/apache/hadoop/blob/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSAppAttempt.java#L842
> [4] https://github.com/apache/hadoop/blob/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/fair/FSLeafQueue.java#L355
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