diff --git a/resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala b/resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
index 9a6a43914bca3..5ca624a8d66cb 100644
--- a/resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
+++ b/resource-managers/yarn/src/main/scala/org/apache/spark/deploy/yarn/ApplicationMaster.scala
@@ -211,9 +211,13 @@ private[spark] class ApplicationMaster(
   final def run(): Int = {
     try {
       val attemptID = if (isClusterMode) {
-        // Set the web ui port to be ephemeral for yarn so we don't conflict with
-        // other spark processes running on the same box
-        System.setProperty(UI_PORT.key, "0")
+        // Set the web ui port to be ephemeral for yarn if not set explicitly
+        // so we don't conflict with other spark processes running on the same box
+        // If set explicitly, Web UI will attempt to run on UI_PORT and try
+        // incrementally until UI_PORT + `spark.port.maxRetries`
+        if (System.getProperty(UI_PORT.key) == null) {
+          System.setProperty(UI_PORT.key, "0")
+        }
 
         // Set the master and deploy mode property to match the requested mode.
         System.setProperty("spark.master", "yarn")