Github user andrewor14 commented on a diff in the pull request:
https://github.com/apache/spark/pull/2143#discussion_r16735808
--- Diff: core/src/main/scala/org/apache/spark/ContextCleaner.scala ---
@@ -76,6 +76,20 @@ private[spark] class ContextCleaner(sc: SparkContext)
extends Logging {
private val blockOnCleanupTasks = sc.conf.getBoolean(
"spark.cleaner.referenceTracking.blocking", true)
+ /**
+ * Whether to disable blocking on shuffle tasks. This override is
effective only when
+ * blocking on cleanup tasks is enabled.
+ *
+ * When context cleaner is configured to block on every delete request,
it can throw timeout
+ * exceptions on cleanup of shuffle blocks, as reported in SPARK-3139.
To avoid that, this
+ * parameter disables blocking on shuffle cleanups when when
`blockOnCleanupTasks` is true).
+ * Note that this does not affect the cleanup of RDDs and broadcasts.
+ * This is intended to be a temporary workaround, until the real Akka
issue (referred to in
+ * the comment above `blockOnCleanupTasks`) is resolved.
+ */
+ private val disableBlockOnShuffleCleanupTasks = sc.conf.getBoolean(
+ "spark.cleaner.referenceTracking.disableBlockingForShuffles", true)
--- End diff --
+1 This is consistent with configs in other places where the more specific
one overrides the general one. Also, everywhere else we only have `enable`
configs, so having a `disable` one is not intuitive to me.
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