diff --git a/spark-sql-application/src/main/scala/org/apache/spark/sql/FlintJobExecutor.scala b/spark-sql-application/src/main/scala/org/apache/spark/sql/FlintJobExecutor.scala
index d0fb201a6..135cc6dbd 100644
--- a/spark-sql-application/src/main/scala/org/apache/spark/sql/FlintJobExecutor.scala
+++ b/spark-sql-application/src/main/scala/org/apache/spark/sql/FlintJobExecutor.scala
@@ -548,7 +548,7 @@ trait FlintJobExecutor {
   }
 
   def getSegmentName(sparkSession: SparkSession): String = {
-    val maxExecutorsCount = sparkSession.conf.get(FlintSparkConf.MAX_EXECUTORS_COUNT.key)
+    val maxExecutorsCount = sparkSession.conf.get(FlintSparkConf.MAX_EXECUTORS_COUNT.key, "unknown")
     String.format("%se", maxExecutorsCount)
   }