[SPARK-21033][CORE][FOLLOW-UP] Update Spillable

[wangyum]

What changes were proposed in this pull request?

Update

SparkEnv.get.conf.getLong("spark.shuffle.spill.numElementsForceSpillThreshold", Long.MaxValue)

to

SparkEnv.get.conf.get(SHUFFLE_SPILL_NUM_ELEMENTS_FORCE_SPILL_THRESHOLD)

because of SHUFFLE_SPILL_NUM_ELEMENTS_FORCE_SPILL_THRESHOLD's default value is Integer.MAX_VALUE:

spark/core/src/main/scala/org/apache/spark/internal/config/package.scala

Lines 503 to 511 in c99fc9a

	private[spark] val SHUFFLE_SPILL_NUM_ELEMENTS_FORCE_SPILL_THRESHOLD =
	ConfigBuilder("spark.shuffle.spill.numElementsForceSpillThreshold")
	.internal()
	.doc("The maximum number of elements in memory before forcing the shuffle sorter to spill. " +
	"By default it's Integer.MAX_VALUE, which means we never force the sorter to spill, " +
	"until we reach some limitations, like the max page size limitation for the pointer " +
	"array in the sorter.")
	.intConf
	.createWithDefault(Integer.MAX_VALUE)

How was this patch tested?

N/A

[cloud-fan]

LGTM

[SparkQA]

Test build #89387 has finished for PR 21077 at commit a7de7c6.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

[cloud-fan]

thanks, merging to master!