Github user JoshRosen commented on the pull request:
https://github.com/apache/spark/pull/4066#issuecomment-72746842
I was able to reproduce one of the test failures locally:
```
[info] - repeatedly failing task that crashes JVM *** FAILED *** (1 minute,
40 seconds)
[info] The code passed to failAfter did not complete within 100000
milliseconds. (DistributedSuite.scala:123)
[info] org.scalatest.exceptions.TestFailedDueToTimeoutException:
[info] at
org.scalatest.concurrent.Timeouts$$anonfun$failAfter$1.apply(Timeouts.scala:249)
[info] at
org.scalatest.concurrent.Timeouts$$anonfun$failAfter$1.apply(Timeouts.scala:249)
[info] at
org.scalatest.concurrent.Timeouts$class.timeoutAfter(Timeouts.scala:345)
[info] at
org.scalatest.concurrent.Timeouts$class.failAfter(Timeouts.scala:245)
[info] at org.scalatest.concurrent.Timeouts$.failAfter(Timeouts.scala:358)
[info] at
org.apache.spark.DistributedSuite$$anonfun$11.apply$mcV$sp(DistributedSuite.scala:123)
[info] at
org.apache.spark.DistributedSuite$$anonfun$11.apply(DistributedSuite.scala:117)
[info] at
org.apache.spark.DistributedSuite$$anonfun$11.apply(DistributedSuite.scala:117)
[info] at
org.scalatest.Transformer$$anonfun$apply$1.apply$mcV$sp(Transformer.scala:22)
[info] at org.scalatest.OutcomeOf$class.outcomeOf(OutcomeOf.scala:85)
[info] at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
[info] at org.scalatest.Transformer.apply(Transformer.scala:22)
[info] at org.scalatest.Transformer.apply(Transformer.scala:20)
[info] at org.scalatest.FunSuiteLike$$anon$1.apply(FunSuiteLike.scala:166)
[info] at org.scalatest.Suite$class.withFixture(Suite.scala:1122)
[info] at org.scalatest.FunSuite.withFixture(FunSuite.scala:1555)
[info] at
org.scalatest.FunSuiteLike$class.invokeWithFixture$1(FunSuiteLike.scala:163)
[info] at
org.scalatest.FunSuiteLike$$anonfun$runTest$1.apply(FunSuiteLike.scala:175)
[info] at
org.scalatest.FunSuiteLike$$anonfun$runTest$1.apply(FunSuiteLike.scala:175)
[info] at org.scalatest.SuperEngine.runTestImpl(Engine.scala:306)
[info] at org.scalatest.FunSuiteLike$class.runTest(FunSuiteLike.scala:175)
[info] at
org.apache.spark.DistributedSuite.org$scalatest$BeforeAndAfterEach$$super$runTest(DistributedSuite.scala:31)
[info] at
org.scalatest.BeforeAndAfterEach$class.runTest(BeforeAndAfterEach.scala:255)
[info] at
org.apache.spark.DistributedSuite.runTest(DistributedSuite.scala:31)
[...]
```
I'm not sure what's causing this, since I don't think this test even
attempts to save Hadoop output. Maybe OutputCommitCoordinator is throwing an
exception and crashing the DAGScheduler?
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