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https://issues.apache.org/jira/browse/SPARK-28584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16899031#comment-16899031
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Dongjoon Hyun commented on SPARK-28584:
---------------------------------------
Oh, got it. Thank you for fixing that, [~vanzin].
> Flaky test: org.apache.spark.scheduler.TaskSchedulerImplSuite
> -------------------------------------------------------------
>
> Key: SPARK-28584
> URL: https://issues.apache.org/jira/browse/SPARK-28584
> Project: Spark
> Issue Type: Bug
> Components: Tests
> Affects Versions: 3.0.0
> Reporter: Marcelo Vanzin
> Assignee: Marcelo Vanzin
> Priority: Minor
> Fix For: 3.0.0
>
>
> This is another of those tests that don't seem to fail in PRs here, but fail
> more often than we'd like in our build machines. In this case it fails in
> several different ways, e.g.:
> {noformat}
> org.scalatest.exceptions.TestFailedException:
> Map(org.apache.spark.scheduler.TaskSetManager$$EnhancerByMockitoWithCGLIB$$c676cf51@412f9d43
> -> 1550579875956) did not contain key
> org.apache.spark.scheduler.TaskSetManager$$EnhancerByMockitoWithCGLIB$$c676cf51@1945f15f
> at
> org.scalatest.Assertions$class.newAssertionFailedException(Assertions.scala:528)
> at
> org.scalatest.FunSuite.newAssertionFailedException(FunSuite.scala:1560)
> at
> org.scalatest.Assertions$AssertionsHelper.macroAssert(Assertions.scala:501)
> at
> org.apache.spark.scheduler.TaskSchedulerImplSuite$$anonfun$21.apply(TaskSchedulerImplSuite.scala:635)
> at
> org.apache.spark.scheduler.TaskSchedulerImplSuite$$anonfun$21.apply(TaskSchedulerImplSuite.scala:591)
> {noformat}
> Or:
> {noformat}
> The code passed to eventually never returned normally. Attempted 40 times
> over 503.217543 milliseconds. Last failure message: tsm.isZombie was false.
> Error message:
> org.scalatest.exceptions.TestFailedDueToTimeoutException: The code passed to
> eventually never returned normally. Attempted 40 times over 503.217543
> milliseconds. Last failure message: tsm.isZombie was false.
> at
> org.scalatest.concurrent.Eventually$class.tryTryAgain$1(Eventually.scala:421)
> at
> org.scalatest.concurrent.Eventually$class.eventually(Eventually.scala:439)
> at
> org.apache.spark.scheduler.TaskSchedulerImplSuite.eventually(TaskSchedulerImplSuite.scala:44)
> at
> org.scalatest.concurrent.Eventually$class.eventually(Eventually.scala:337)
> at
> org.apache.spark.scheduler.TaskSchedulerImplSuite.eventually(TaskSchedulerImplSuite.scala:44)
> at
> org.apache.spark.scheduler.TaskSchedulerImplSuite$$anonfun$18.apply(TaskSchedulerImplSuite.scala:543)
> at
> org.apache.spark.scheduler.TaskSchedulerImplSuite$$anonfun$18.apply(TaskSchedulerImplSuite.scala:511)
> {noformat}
> There's a race condition in the test that can cause these different failures.
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