diff --git a/flink-clients/src/main/java/org/apache/flink/client/LocalExecutor.java b/flink-clients/src/main/java/org/apache/flink/client/LocalExecutor.java
index abd35fc86df8a11121c71391a6fd135202061590..bb74bdb56a9e80b930c2488668437d1b4669624c 100644
--- a/flink-clients/src/main/java/org/apache/flink/client/LocalExecutor.java
+++ b/flink-clients/src/main/java/org/apache/flink/client/LocalExecutor.java
@@ -220,7 +220,7 @@ public class LocalExecutor extends PlanExecutor {
 
 	@Override
 	public void endSession(JobID jobID) throws Exception {
-		synchronized (LocalExecutor.class) {
+		synchronized (this.lock) {
 			LocalFlinkMiniCluster flink = this.flink;
 			if (flink != null) {
 				ActorGateway leaderGateway = flink.getLeaderGateway(AkkaUtils.getDefaultTimeoutAsFiniteDuration());