From 6c3493060a1d6d0a25bd5b559702fa167d1d339f Mon Sep 17 00:00:00 2001
From: miinhho <mjang6988@gmail.com>
Date: Sat, 11 Jul 2026 16:20:58 +0900
Subject: [PATCH] [ZEPPELIN-6506] Return empty list instead of null from
 completion() in Groovy interpreter

---
 .../main/java/org/apache/zeppelin/groovy/GroovyInterpreter.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/groovy/src/main/java/org/apache/zeppelin/groovy/GroovyInterpreter.java b/groovy/src/main/java/org/apache/zeppelin/groovy/GroovyInterpreter.java
index b8eef8c342e..3c6cbed8740 100644
--- a/groovy/src/main/java/org/apache/zeppelin/groovy/GroovyInterpreter.java
+++ b/groovy/src/main/java/org/apache/zeppelin/groovy/GroovyInterpreter.java
@@ -117,7 +117,7 @@ private Job getRunningJob(String paragraphId) {
   @Override
   public List<InterpreterCompletion> completion(String buf, int cursor,
                                                 InterpreterContext interpreterContext) {
-    return null;
+    return Collections.emptyList();
   }
 
   @SuppressWarnings("unchecked")