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https://issues.apache.org/jira/browse/SPARK-25903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16933335#comment-16933335
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Jungtaek Lim commented on SPARK-25903:
--------------------------------------
Hit this again:
[https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/110979/testReport/]
> Flaky test: BarrierTaskContextSuite.throw exception on barrier() call timeout
> -----------------------------------------------------------------------------
>
> Key: SPARK-25903
> URL: https://issues.apache.org/jira/browse/SPARK-25903
> Project: Spark
> Issue Type: Bug
> Components: Tests
> Affects Versions: 2.4.0, 3.0.0
> Reporter: Marcelo Vanzin
> Priority: Major
>
> We hit this in our internal builds.
> {noformat}
> Expected exception org.apache.spark.SparkException to be thrown, but no
> exception was thrown
> Stacktrace
> org.scalatest.exceptions.TestFailedException: Expected exception
> org.apache.spark.SparkException to be thrown, but no exception was thrown
> at
> org.scalatest.Assertions$class.newAssertionFailedException(Assertions.scala:528)
> at
> org.scalatest.FunSuite.newAssertionFailedException(FunSuite.scala:1560)
> at org.scalatest.Assertions$class.intercept(Assertions.scala:822)
> at org.scalatest.FunSuite.intercept(FunSuite.scala:1560)
> at
> org.apache.spark.scheduler.BarrierTaskContextSuite$$anonfun$7.apply(BarrierTaskContextSuite.scala:94)
> at
> org.apache.spark.scheduler.BarrierTaskContextSuite$$anonfun$7.apply(BarrierTaskContextSuite.scala:76)
> at org.scalatest.OutcomeOf$class.outcomeOf(OutcomeOf.scala:85)
> {noformat}
> The problem from the logs is that the first task to call {{barrier()}} took a
> while, and at that point the "slow" task was already running, so the sleep
> finishes before the 2s timeout runs out.
> -
> https://amplab.cs.berkeley.edu/jenkins/view/Spark%20QA%20Test%20(Dashboard)/job/spark-master-test-maven-hadoop-2.7-ubuntu-scala-2.11/169/
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