Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/1931#discussion_r16223115
--- Diff: core/src/main/scala/org/apache/spark/ContextCleaner.scala ---
@@ -65,11 +66,37 @@ private[spark] class ContextCleaner(sc: SparkContext)
extends Logging {
private val cleaningThread = new Thread() { override def run() {
keepCleaning() }}
/**
+ * Keep track of the reference queue length and log an error if this
exceeds a certain capacity.
+ * Unfortunately, Java's ReferenceQueue exposes neither the queue length
nor the enqueue method,
+ * so we have to do this through reflection. This is expensive, however,
so we should access
+ * this field only once in a while.
+ */
+ private val queueCapacity = 10000
--- End diff --
Well, this is not the capacity. It is just a warning threshold. it should
be named accordingly.
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