diff --git a/flink-end-to-end-tests/flink-end-to-end-tests-table-api/pom.xml b/flink-end-to-end-tests/flink-end-to-end-tests-table-api/pom.xml
index be819aa3c7af1..d7e88114adf44 100644
--- a/flink-end-to-end-tests/flink-end-to-end-tests-table-api/pom.xml
+++ b/flink-end-to-end-tests/flink-end-to-end-tests-table-api/pom.xml
@@ -39,6 +39,13 @@ under the License.
 			<scope>provided</scope>
 		</dependency>
 
+		<!-- Incompatible Scala library in user code shouldn't break table-planner -->
+		<dependency>
+			<groupId>org.scala-lang</groupId>
+			<artifactId>scala-library</artifactId>
+			<version>2.13.18</version>
+		</dependency>
+
 		<!-- Flink Table API -->
 		<dependency>
 			<groupId>org.apache.flink</groupId>
diff --git a/flink-end-to-end-tests/flink-end-to-end-tests-table-api/src/test/java/org/apache/flink/table/test/join/JoinWithCustomTypeExampleTest.java b/flink-end-to-end-tests/flink-end-to-end-tests-table-api/src/test/java/org/apache/flink/table/test/join/JoinWithCustomTypeExampleTest.java
new file mode 100644
index 0000000000000..0e51c0dbc5f95
--- /dev/null
+++ b/flink-end-to-end-tests/flink-end-to-end-tests-table-api/src/test/java/org/apache/flink/table/test/join/JoinWithCustomTypeExampleTest.java
@@ -0,0 +1,29 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.table.test.join;
+
+import org.junit.jupiter.api.Test;
+
+public class JoinWithCustomTypeExampleTest {
+
+    @Test
+    void testJoinWithCustomTypeExample() throws Exception {
+        JoinWithCustomTypeExample.main(new String[0]);
+    }
+}
diff --git a/flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/operators/join/adaptive/AdaptiveJoinOperatorFactory.java b/flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/operators/join/adaptive/AdaptiveJoinOperatorFactory.java
index 7246f3718c07f..890060082ae0b 100644
--- a/flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/operators/join/adaptive/AdaptiveJoinOperatorFactory.java
+++ b/flink-table/flink-table-runtime/src/main/java/org/apache/flink/table/runtime/operators/join/adaptive/AdaptiveJoinOperatorFactory.java
@@ -102,9 +102,10 @@ public StreamOperatorFactory<?> genOperatorFactory(
         ClassLoader classLoader =
                 plannerModule == null
                         ? userClassLoader
-                        : FlinkUserCodeClassLoaders.parentFirst(
+                        : FlinkUserCodeClassLoaders.childFirst(
                                 plannerModule.getSubmoduleClassLoader().getURLs(),
                                 userClassLoader,
+                                new String[0],
                                 NOOP_EXCEPTION_HANDLER,
                                 checkClassLoaderLeak);