dongjoon-hyun commented on PR #40690:
URL: https://github.com/apache/spark/pull/40690#issuecomment-1661395670
Hi, @jiangxb1987 and all. It seems that we found a bug at Apache Spark
3.4.1. The following test code shows a regression.
If you don't mind, shall we revert this improvement PR from `branch-3.4`
while keeping it `master` and `branch-3.5`?
```scala
test("SPARK-XXX: getMapOutputLocation should not throw NPE") {
val tracker = newTrackerMaster()
try {
tracker.registerShuffle(0, 1, 1)
tracker.registerMapOutput(0, 0, MapStatus(BlockManagerId("exec-1",
"hostA", 1000),
Array(2L), 0))
tracker.removeOutputsOnHost("hostA")
assert(tracker.getMapOutputLocation(0, 0) == None)
} finally {
tracker.stop()
}
}
```
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