attilapiros commented on a change in pull request #28848:
URL: https://github.com/apache/spark/pull/28848#discussion_r441393834
##########
File path:
core/src/test/scala/org/apache/spark/scheduler/DAGSchedulerSuite.scala
##########
@@ -540,6 +540,46 @@ class DAGSchedulerSuite extends SparkFunSuite with
LocalSparkContext with TimeLi
assert(mapStatus2(2).location.host === "hostB")
}
+ test("[SPARK-32003] All shuffle files for executor should be cleaned up on
fetch failure") {
+ // reset the test context with the right shuffle service config
+ afterEach()
+ val conf = new SparkConf()
+ conf.set(config.SHUFFLE_SERVICE_ENABLED.key, "true")
+ init(conf)
+
+ val shuffleMapRdd = new MyRDD(sc, 3, Nil)
+ val shuffleDep = new ShuffleDependency(shuffleMapRdd, new
HashPartitioner(3))
+ val shuffleId = shuffleDep.shuffleId
+ val reduceRdd = new MyRDD(sc, 3, List(shuffleDep), tracker =
mapOutputTracker)
+
+ submit(reduceRdd, Array(0, 1, 2))
+ // Map stage completes successfully,
+ // two tasks are run on an executor on hostA and one on an executor on
hostB
+ complete(taskSets(0), Seq(
+ (Success, makeMapStatus("hostA", 3)),
+ (Success, makeMapStatus("hostA", 3)),
+ (Success, makeMapStatus("hostB", 3))))
+ // Now the executor on hostA is lost
+ runEvent(ExecutorLost("hostA-exec", ExecutorExited(-100, false, "Container
marked as failed")))
+
+ // The MapOutputTracker has all the shuffle files
+ val initialMapStatuses =
mapOutputTracker.shuffleStatuses(shuffleId).mapStatuses
+ assert(initialMapStatuses.count(_ != null) == 3)
+ assert(initialMapStatuses(0).location.executorId === "hostA-exec")
+ assert(initialMapStatuses(1).location.executorId === "hostA-exec")
+ assert(initialMapStatuses(2).location.executorId === "hostB-exec")
Review comment:
This solution is fine but I think what we really care for is the number
of shuffle files on `hostA-exec` and not their order. So what I would do here
is:
```suggestion
val isLocatedOnHostA =
(status: MapStatus) => status != null && status.location.executorId ==
"hostA-exec"
assert(initialMapStatuses.count(isLocatedOnHostA) === 2)
```
And down below this filter can be reused like:
```scala
assert(mapStatuses.exists(isLocatedOnHostA) === false)
```
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