Github user tgravescs commented on a diff in the pull request:
https://github.com/apache/spark/pull/11800#discussion_r60415488
--- Diff:
core/src/main/scala/org/apache/spark/deploy/history/FsHistoryProvider.scala ---
@@ -133,7 +133,8 @@ private[history] class FsHistoryProvider(conf:
SparkConf, clock: Clock)
*/
private val replayExecutor: ExecutorService = {
if (!conf.contains("spark.testing")) {
- ThreadUtils.newDaemonSingleThreadExecutor("log-replay-executor")
+ val numProcessors = Runtime.getRuntime.availableProcessors()
--- End diff --
I would rather see this configurable. Many times history server runs on
same machine as other things (like Yarn ResourceManager or history server for
MapReduce, etc) and I wouldn't want the history server to starve out more
important things.
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