diff --git a/spark-operator/src/main/java/org/apache/spark/k8s/operator/config/SparkOperatorConfManager.java b/spark-operator/src/main/java/org/apache/spark/k8s/operator/config/SparkOperatorConfManager.java
index a3e8e369..13e87a9c 100644
--- a/spark-operator/src/main/java/org/apache/spark/k8s/operator/config/SparkOperatorConfManager.java
+++ b/spark-operator/src/main/java/org/apache/spark/k8s/operator/config/SparkOperatorConfManager.java
@@ -60,8 +60,10 @@ protected SparkOperatorConfManager() {
   }
 
   public String getValue(String key) {
-    String currentValue = configOverrides.getProperty(key);
-    return StringUtils.isEmpty(currentValue) ? getInitialValue(key) : currentValue;
+    synchronized (this) {
+      String currentValue = configOverrides.getProperty(key);
+      return StringUtils.isEmpty(currentValue) ? getInitialValue(key) : currentValue;
+    }
   }
 
   public String getInitialValue(String key) {