Szilard Nemeth created YARN-9025:
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Summary: Make TestFairScheduler#testChildMaxResources more
reliable, as it is flaky now
Key: YARN-9025
URL: https://issues.apache.org/jira/browse/YARN-9025
Project: Hadoop YARN
Issue Type: Bug
Affects Versions: 3.3.0
Reporter: Szilard Nemeth
Assignee: Szilard Nemeth
During making the code patch for YARN-8059, I come across a flaky test, see
this link:
https://builds.apache.org/job/PreCommit-YARN-Build/22412/artifact/out/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt
This is the error message:
{code:java}
[ERROR] Tests run: 108, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 19.37
s <<< FAILURE! - in
org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairScheduler
[ERROR]
testChildMaxResources(org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairScheduler)
Time elapsed: 0.164 s <<< FAILURE!
java.lang.AssertionError: App 1 is not running with the correct number of
containers expected:<2> but was:<0>
at org.junit.Assert.fail(Assert.java:88){code}
So the thing is, even if we had 8 node updates, due to the nature of how we
handle the events, it can happen that no container is allocated for the
application.
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