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https://issues.apache.org/jira/browse/YARN-5543?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16007199#comment-16007199
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Hudson commented on YARN-5543:
------------------------------
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #11725 (See
[https://builds.apache.org/job/Hadoop-trunk-Commit/11725/])
YARN-5543. ResourceManager SchedulingMonitor could potentially terminate (shv:
rev 2ada100da7cfe12946e43da2929bd80c2a8bd833)
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/TestSchedulingMonitor.java
* (edit)
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/monitor/SchedulingMonitor.java
> ResourceManager SchedulingMonitor could potentially terminate the preemption
> checker thread
> -------------------------------------------------------------------------------------------
>
> Key: YARN-5543
> URL: https://issues.apache.org/jira/browse/YARN-5543
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacityscheduler, resourcemanager
> Affects Versions: 2.7.0, 2.6.1
> Reporter: Min Shen
> Assignee: Min Shen
> Labels: oct16-medium
> Fix For: 2.9.0, 2.7.4, 3.0.0-alpha3, 2.8.2
>
> Attachments: YARN-5543.001.patch, YARN-5543.002.patch,
> YARN-5543.003.patch, YARN-5543.004.patch, YARN-5543-branch-2.7.001.patch,
> YARN-5543-branch-2.7.002.patch
>
>
> In SchedulingMonitor.java, when the service starts, it starts a checker
> thread to perform Capacity Scheduler's preemption. However, the
> implementation of this checker thread has the following issue:
> {code}
> while (!stopped && !Thread.currentThread().isInterrupted()) {
> ....
> try {
> Thread.sleep(monitorInterval)
> } catch (InterruptedException e) {
> ....
> break;
> }
> }
> {code}
> The above code snippet will terminate the checker thread whenever it is
> interrupted.
> We noticed in our cluster that this could lead to CapacityScheduler's
> preemption disabled unexpectedly due to the checker thread getting terminated.
> We propose to use ScheduledExecutorService to improve the robustness of this
> part of the code to ensure the liveness of CapacityScheduler's preemption
> functionality.
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