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-rw-r--r--core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala2
1 files changed, 1 insertions, 1 deletions
diff --git a/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala b/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
index 2f45d192e1..5c5ecc8434 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/cluster/SparkDeploySchedulerBackend.scala
@@ -34,7 +34,7 @@ private[spark] class SparkDeploySchedulerBackend(
var client: AppClient = null
var stopping = false
var shutdownCallback : (SparkDeploySchedulerBackend) => Unit = _
- var appId: String = _
+ @volatile var appId: String = _
val registrationLock = new Object()
var registrationDone = false