diff --git a/kyuubi-common/src/main/scala/org/apache/kyuubi/Utils.scala b/kyuubi-common/src/main/scala/org/apache/kyuubi/Utils.scala
index accfca4c98f..0144dadbb86 100644
--- a/kyuubi-common/src/main/scala/org/apache/kyuubi/Utils.scala
+++ b/kyuubi-common/src/main/scala/org/apache/kyuubi/Utils.scala
@@ -340,7 +340,7 @@ object Utils extends Logging {
 
   private val PATTERN_FOR_KEY_VALUE_ARG = "(.+?)=(.+)".r
 
-  def redactCommandLineArgs(conf: KyuubiConf, commands: Array[String]): Array[String] = {
+  def redactCommandLineArgs(conf: KyuubiConf, commands: Iterable[String]): Iterable[String] = {
     val redactionPattern = conf.get(SERVER_SECRET_REDACTION_PATTERN)
     var nextKV = false
     commands.map {
diff --git a/kyuubi-common/src/test/scala/org/apache/kyuubi/UtilsSuite.scala b/kyuubi-common/src/test/scala/org/apache/kyuubi/UtilsSuite.scala
index 5973fc6e7a6..97d9cd1b552 100644
--- a/kyuubi-common/src/test/scala/org/apache/kyuubi/UtilsSuite.scala
+++ b/kyuubi-common/src/test/scala/org/apache/kyuubi/UtilsSuite.scala
@@ -167,7 +167,7 @@ class UtilsSuite extends KyuubiFunSuite {
     buffer += "--conf"
     buffer += "kyuubi.regular.property2=regular_value"
 
-    val commands = buffer.toArray
+    val commands = buffer
 
     // Redact sensitive information
     val redactedCmdArgs = Utils.redactCommandLineArgs(conf, commands)
@@ -183,7 +183,7 @@ class UtilsSuite extends KyuubiFunSuite {
     expectBuffer += "--conf"
     expectBuffer += "kyuubi.regular.property2=regular_value"
 
-    assert(expectBuffer.toArray === redactedCmdArgs)
+    assert(expectBuffer === redactedCmdArgs)
   }
 
   test("redact sensitive information") {
diff --git a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/ProcBuilder.scala b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/ProcBuilder.scala
index 9c7f0f510cb..dad7b1721ab 100644
--- a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/ProcBuilder.scala
+++ b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/ProcBuilder.scala
@@ -99,7 +99,7 @@ trait ProcBuilder {
 
   protected def proxyUser: String
 
-  protected val commands: Array[String]
+  protected val commands: Iterable[String]
 
   def conf: KyuubiConf
 
diff --git a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/chat/ChatProcessBuilder.scala b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/chat/ChatProcessBuilder.scala
index 121a20f5f23..ade6026b18f 100644
--- a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/chat/ChatProcessBuilder.scala
+++ b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/chat/ChatProcessBuilder.scala
@@ -59,7 +59,7 @@ class ChatProcessBuilder(
    */
   override protected def mainClass: String = "org.apache.kyuubi.engine.chat.ChatEngine"
 
-  override protected val commands: Array[String] = {
+  override protected val commands: Iterable[String] = {
     val buffer = new ArrayBuffer[String]()
     buffer += executable
 
@@ -98,7 +98,7 @@ class ChatProcessBuilder(
       buffer += "--conf"
       buffer += s"$k=$v"
     }
-    buffer.toArray
+    buffer
   }
 
   override def toString: String = {
diff --git a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/flink/FlinkProcessBuilder.scala b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/flink/FlinkProcessBuilder.scala
index f43adfbc216..0bf5a6394de 100644
--- a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/flink/FlinkProcessBuilder.scala
+++ b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/flink/FlinkProcessBuilder.scala
@@ -77,7 +77,7 @@ class FlinkProcessBuilder(
     ApplicationManagerInfo(clusterManager())
   }
 
-  override protected val commands: Array[String] = {
+  override protected val commands: Iterable[String] = {
     KyuubiApplicationManager.tagApplication(engineRefId, shortName, clusterManager(), conf)
     // unset engine credentials because Flink doesn't support them at the moment
     conf.unset(KyuubiReservedKeys.KYUUBI_ENGINE_CREDENTIALS_KEY)
@@ -143,7 +143,7 @@ class FlinkProcessBuilder(
           }
         }
 
-        buffer.toArray
+        buffer
 
       case _ =>
         val buffer = new ArrayBuffer[String]()
@@ -211,7 +211,7 @@ class FlinkProcessBuilder(
           buffer += "--conf"
           buffer += s"$k=$v"
         }
-        buffer.toArray
+        buffer
     }
   }
 
diff --git a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/hive/HiveProcessBuilder.scala b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/hive/HiveProcessBuilder.scala
index 3325d5f2e02..d7e2709119f 100644
--- a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/hive/HiveProcessBuilder.scala
+++ b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/hive/HiveProcessBuilder.scala
@@ -52,7 +52,7 @@ class HiveProcessBuilder(
 
   override protected def mainClass: String = "org.apache.kyuubi.engine.hive.HiveSQLEngine"
 
-  override protected val commands: Array[String] = {
+  override protected val commands: Iterable[String] = {
     KyuubiApplicationManager.tagApplication(engineRefId, shortName, clusterManager(), conf)
     val buffer = new ArrayBuffer[String]()
     buffer += executable
@@ -113,7 +113,7 @@ class HiveProcessBuilder(
       buffer += "--conf"
       buffer += s"$k=$v"
     }
-    buffer.toArray
+    buffer
   }
 
   override def shortName: String = "hive"
diff --git a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/jdbc/JdbcProcessBuilder.scala b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/jdbc/JdbcProcessBuilder.scala
index 3849c6431e9..5b52dbbb471 100644
--- a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/jdbc/JdbcProcessBuilder.scala
+++ b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/jdbc/JdbcProcessBuilder.scala
@@ -59,7 +59,7 @@ class JdbcProcessBuilder(
    */
   override protected def mainClass: String = "org.apache.kyuubi.engine.jdbc.JdbcSQLEngine"
 
-  override protected val commands: Array[String] = {
+  override protected val commands: Iterable[String] = {
     require(
       conf.get(ENGINE_JDBC_CONNECTION_URL).nonEmpty,
       s"Jdbc server url can not be null! Please set ${ENGINE_JDBC_CONNECTION_URL.key}")
@@ -101,7 +101,7 @@ class JdbcProcessBuilder(
       buffer += "--conf"
       buffer += s"$k=$v"
     }
-    buffer.toArray
+    buffer
   }
 
   override def toString: String = {
diff --git a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/spark/SparkBatchProcessBuilder.scala b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/spark/SparkBatchProcessBuilder.scala
index ef159bb93ad..7d69b90d5db 100644
--- a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/spark/SparkBatchProcessBuilder.scala
+++ b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/spark/SparkBatchProcessBuilder.scala
@@ -36,7 +36,7 @@ class SparkBatchProcessBuilder(
   extends SparkProcessBuilder(proxyUser, conf, batchId, extraEngineLog) {
   import SparkProcessBuilder._
 
-  override protected lazy val commands: Array[String] = {
+  override protected lazy val commands: Iterable[String] = {
     val buffer = new ArrayBuffer[String]()
     buffer += executable
     Option(mainClass).foreach { cla =>
@@ -66,7 +66,7 @@ class SparkBatchProcessBuilder(
 
     batchArgs.foreach { arg => buffer += arg }
 
-    buffer.toArray
+    buffer
   }
 
   private def sparkAppNameConf(): Map[String, String] = {
diff --git a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/spark/SparkProcessBuilder.scala b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/spark/SparkProcessBuilder.scala
index 086ca057de8..57d5f73357d 100644
--- a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/spark/SparkProcessBuilder.scala
+++ b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/spark/SparkProcessBuilder.scala
@@ -122,7 +122,7 @@ class SparkProcessBuilder(
     file.isDirectory && r.findFirstMatchIn(file.getName).isDefined
   }
 
-  override protected lazy val commands: Array[String] = {
+  override protected lazy val commands: Iterable[String] = {
     // complete `spark.master` if absent on kubernetes
     completeMasterUrl(conf)
 
@@ -149,7 +149,7 @@ class SparkProcessBuilder(
 
     mainResource.foreach { r => buffer += r }
 
-    buffer.toArray
+    buffer
   }
 
   override protected def module: String = "kyuubi-spark-sql-engine"
diff --git a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/trino/TrinoProcessBuilder.scala b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/trino/TrinoProcessBuilder.scala
index 5b755dec5a1..04dc49e037a 100644
--- a/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/trino/TrinoProcessBuilder.scala
+++ b/kyuubi-server/src/main/scala/org/apache/kyuubi/engine/trino/TrinoProcessBuilder.scala
@@ -50,7 +50,7 @@ class TrinoProcessBuilder(
 
   override protected def mainClass: String = "org.apache.kyuubi.engine.trino.TrinoSqlEngine"
 
-  override protected val commands: Array[String] = {
+  override protected val commands: Iterable[String] = {
     KyuubiApplicationManager.tagApplication(engineRefId, shortName, clusterManager(), conf)
     require(
       conf.get(ENGINE_TRINO_CONNECTION_URL).nonEmpty,
@@ -104,7 +104,7 @@ class TrinoProcessBuilder(
       buffer += "--conf"
       buffer += s"$k=$v"
     }
-    buffer.toArray
+    buffer
   }
 
   override def shortName: String = "trino"
diff --git a/kyuubi-server/src/test/scala/org/apache/kyuubi/engine/spark/SparkProcessBuilderSuite.scala b/kyuubi-server/src/test/scala/org/apache/kyuubi/engine/spark/SparkProcessBuilderSuite.scala
index 7bbe4ad0670..27fd36815f8 100644
--- a/kyuubi-server/src/test/scala/org/apache/kyuubi/engine/spark/SparkProcessBuilderSuite.scala
+++ b/kyuubi-server/src/test/scala/org/apache/kyuubi/engine/spark/SparkProcessBuilderSuite.scala
@@ -427,5 +427,5 @@ class SparkProcessBuilderSuite extends KerberizedTestHelper with MockitoSugar {
 
 class FakeSparkProcessBuilder(config: KyuubiConf)
   extends SparkProcessBuilder("fake", config) {
-  override protected lazy val commands: Array[String] = Array("ls")
+  override protected lazy val commands: Iterable[String] = Seq("ls")
 }