[SPARK-28214] Flaky test: org.apache.spark.streaming.CheckpointSuite.basic rdd checkpoints + dstream graph checkpoint recovery

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.0
• Fix Version/s: 3.0.0
• Component/s: DStreams, Tests
• Assignee: Jungtaek Lim
• Reporter: Marcelo Masiero Vanzin
• Created: 29/Jun/19 00:01
• Updated: 09/Sep/19 23:20
• Resolved: 09/Sep/19 22:37

Description

This test has failed a few times in some PRs. Example of a failure:

Error Message
org.scalatest.exceptions.TestFailedException: Map() was empty No checkpointed RDDs in state stream before first failure
Stacktrace
sbt.ForkMain$ForkError: org.scalatest.exceptions.TestFailedException: Map() was empty No checkpointed RDDs in state stream before first failure
	at org.scalatest.Assertions.newAssertionFailedException(Assertions.scala:528)
	at org.scalatest.Assertions.newAssertionFailedException$(Assertions.scala:527)
	at org.scalatest.FunSuite.newAssertionFailedException(FunSuite.scala:1560)
	at org.scalatest.Assertions$AssertionsHelper.macroAssert(Assertions.scala:501)
	at org.apache.spark.streaming.CheckpointSuite.$anonfun$new$3(CheckpointSuite.scala:266)
	at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
	at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)
	at org.scalatest.OutcomeOf.outcomeOf$(OutcomeOf.scala:83)
	at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
	at org.scalatest.Transformer.apply(Transformer.scala:22)
	at org.scalatest.Transformer.apply(Transformer.scala:20)
	at org.scalatest.FunSuiteLike$$anon$1.apply(FunSuiteLike.scala:186)
	at org.apache.spark.SparkFunSuite.withFixture(SparkFunSuite.scala:149)
	at org.scalatest.FunSuiteLike.invokeWithFixture$1(FunSuiteLike.scala:184)
	at org.scalatest.FunSuiteLike.$anonfun$runTest$1(FunSuiteLike.scala:196)
	at org.scalatest.SuperEngine.runTestImpl(Engine.scala:289)
	at org.scalatest.FunSuiteLike.runTest(FunSuiteLike.scala:196)
	at org.scalatest.FunSuiteLike.runTest$(FunSuiteLike.scala:178)
	at org.apache.spark.SparkFunSuite.org$scalatest$BeforeAndAfterEach$$super$runTest(SparkFunSuite.scala:56)
	at org.scalatest.BeforeAndAfterEach.runTest(BeforeAndAfterEach.scala:221)
	at org.scalatest.BeforeAndAfterEach.runTest$(BeforeAndAfterEach.scala:214)
	at org.apache.spark.streaming.CheckpointSuite.org$scalatest$BeforeAndAfter$$super$runTest(CheckpointSuite.scala:209)

On top of that, when this failure happens, the test leaves a running SparkContext behind, which makes every single unit test run after it on that project fail.

Issue Links

• links to: GitHub Pull Request #25731