Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/15915#discussion_r92322708
--- Diff:
core/src/test/scala/org/apache/spark/storage/MemoryStoreSuite.scala ---
@@ -303,6 +303,34 @@ class MemoryStoreSuite
assert(memoryStore.currentUnrollMemoryForThisTask === 0) // discard
released the unroll memory
}
+ test("set unrollMemoryThreshold a huge value larger than Int.MaxValue") {
+ val tmpConf = conf.clone.set("spark.storage.unrollMemoryThreshold",
s"${1L + Int.MaxValue}")
+ val (memoryStore, blockInfoManager) = makeMemoryStore(12000L +
Int.MaxValue, tmpConf)
+ val smallList = List.fill(40)(new Array[Byte](100))
+ def smallIterator: Iterator[Any] =
smallList.iterator.asInstanceOf[Iterator[Any]]
+ assert(memoryStore.currentUnrollMemoryForThisTask === 0)
+
+ def putIteratorAsBytes[T](
+ blockId: BlockId,
+ iter: Iterator[T],
+ classTag: ClassTag[T]): Either[PartiallySerializedBlock[T], Long]
= {
+ assert(blockInfoManager.lockNewBlockForWriting(
+ blockId,
+ new BlockInfo(StorageLevel.MEMORY_ONLY_SER, classTag, tellMaster =
false)))
+ val res = memoryStore.putIteratorAsBytes(blockId, iter, classTag,
MemoryMode.ON_HEAP)
+ blockInfoManager.unlock(blockId)
+ res
+ }
+
+ // Unroll with plenty of space. This should succeed and cache both
blocks.
+ val result1 = putIteratorAsBytes("b1", smallIterator, ClassTag.Any)
+ val result2 = putIteratorAsBytes("b2", smallIterator, ClassTag.Any)
+ assert(memoryStore.contains("b1"))
+ assert(memoryStore.contains("b2"))
+ assert(result1.isRight) // unroll was successful
+ assert(result2.isRight)
--- End diff --
Let's also check if the `currentUnrollMemoryForThisTask` is the default
size 4MB.
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