Github user zsxwing commented on a diff in the pull request:
https://github.com/apache/spark/pull/11746#discussion_r57394811
--- Diff:
core/src/main/scala/org/apache/spark/deploy/worker/DriverRunner.scala ---
@@ -49,13 +49,16 @@ private[deploy] class DriverRunner(
val securityManager: SecurityManager)
extends Logging {
- @volatile private var process: Option[Process] = None
- @volatile private var killed = false
+ private var workerThread: Thread = null
+ private var process: Process = null
+ private var shutdownHook: AnyRef = null
--- End diff --
`shutdownHook` can be just a local var
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