Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/11257#discussion_r53494513
--- Diff: core/src/main/scala/org/apache/spark/api/python/PythonRDD.scala
---
@@ -892,8 +933,18 @@ private[spark] class PythonBroadcast(@transient var
path: String) extends Serial
private def readObject(in: ObjectInputStream): Unit =
Utils.tryOrIOException {
val dir = new File(Utils.getLocalDir(SparkEnv.get.conf))
val file = File.createTempFile("broadcast", "", dir)
+ val queue = new ReferenceQueue[File]()
+ val exitWhenFinished=false
+ val phantomReferences = new ListBuffer[FilePhantomReference]()
+ val threadName = "WeakReference"
+ val phantomThread=new PhantomThread(threadName,queue,phantomReferences)
--- End diff --
it's not a good idea that creating a new thread for each PythonBroadcast.
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