diff --git a/pulsar-functions/worker/src/main/java/org/apache/pulsar/functions/worker/rest/Resources.java b/pulsar-functions/worker/src/main/java/org/apache/pulsar/functions/worker/rest/Resources.java
index 3eabc881796c7..cbf2251d1b4fe 100644
--- a/pulsar-functions/worker/src/main/java/org/apache/pulsar/functions/worker/rest/Resources.java
+++ b/pulsar-functions/worker/src/main/java/org/apache/pulsar/functions/worker/rest/Resources.java
@@ -21,6 +21,7 @@
 import java.util.Arrays;
 import java.util.HashSet;
 import java.util.Set;
+import org.apache.pulsar.broker.web.UnrecognizedPropertyExceptionMapper;
 import org.apache.pulsar.functions.worker.rest.api.FunctionsMetricsResource;
 import org.apache.pulsar.functions.worker.rest.api.v2.FunctionsApiV2Resource;
 import org.apache.pulsar.functions.worker.rest.api.v2.WorkerApiV2Resource;
@@ -43,6 +44,7 @@ public static Set<Class<?>> getApiV2Resources() {
                         FunctionsApiV2Resource.class,
                         WorkerApiV2Resource.class,
                         WorkerStatsApiV2Resource.class,
+                        UnrecognizedPropertyExceptionMapper.class,
                         MultiPartFeature.class
                 ));
     }
@@ -52,6 +54,7 @@ public static Set<Class<?>> getApiV3Resources() {
         return new HashSet<>(
                 Arrays.asList(
                         MultiPartFeature.class,
+                        UnrecognizedPropertyExceptionMapper.class,
                         SourcesApiV3Resource.class,
                         SourceApiV3Resource.class,
                         SinksApiV3Resource.class,
diff --git a/pulsar-functions/worker/src/test/java/org/apache/pulsar/functions/worker/rest/ResourcesTest.java b/pulsar-functions/worker/src/test/java/org/apache/pulsar/functions/worker/rest/ResourcesTest.java
new file mode 100644
index 0000000000000..e7ff36068438f
--- /dev/null
+++ b/pulsar-functions/worker/src/test/java/org/apache/pulsar/functions/worker/rest/ResourcesTest.java
@@ -0,0 +1,32 @@
+/*
+ * 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.pulsar.functions.worker.rest;
+
+import static org.testng.Assert.assertTrue;
+import org.apache.pulsar.broker.web.UnrecognizedPropertyExceptionMapper;
+import org.testng.annotations.Test;
+
+public class ResourcesTest {
+
+    @Test
+    public void testJsonExceptionMapperIsRegisteredForApiResources() {
+        assertTrue(Resources.getApiV2Resources().contains(UnrecognizedPropertyExceptionMapper.class));
+        assertTrue(Resources.getApiV3Resources().contains(UnrecognizedPropertyExceptionMapper.class));
+    }
+}