diff --git a/inlong-manager/manager-service/src/main/java/org/apache/inlong/manager/service/resource/sink/es/ElasticsearchApi.java b/inlong-manager/manager-service/src/main/java/org/apache/inlong/manager/service/resource/sink/es/ElasticsearchApi.java
index e88bb102b39..8dc0c0b8c04 100644
--- a/inlong-manager/manager-service/src/main/java/org/apache/inlong/manager/service/resource/sink/es/ElasticsearchApi.java
+++ b/inlong-manager/manager-service/src/main/java/org/apache/inlong/manager/service/resource/sink/es/ElasticsearchApi.java
@@ -39,11 +39,12 @@
 import org.springframework.http.HttpMethod;
 import org.springframework.stereotype.Component;
 import org.springframework.web.client.HttpClientErrorException.NotFound;
-import sun.misc.BASE64Encoder;
 
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
+import java.util.Base64;
+import java.util.Base64.Encoder;
 import java.util.List;
 import java.util.Map;
 
@@ -54,6 +55,8 @@
 @Component
 public class ElasticsearchApi {
 
+    private static final Logger LOG = LoggerFactory.getLogger(ElasticsearchApi.class);
+
     private static final Gson GSON = new GsonBuilder().create();
 
     private static final String MAPPINGS_KEY = "mappings";
@@ -68,7 +71,7 @@ public class ElasticsearchApi {
 
     private static final String CONTENT_TYPE_VALUE = "application/json;charset=UTF-8";
 
-    private static final Logger LOG = LoggerFactory.getLogger(ElasticsearchApi.class);
+    private final Encoder base64Encoder = Base64.getEncoder();
 
     @Autowired
     private ElasticsearchConfig esConfig;
@@ -84,7 +87,7 @@ private HttpHeaders getHttpHeaders() {
         if (esConfig.getAuthEnable()) {
             if (StringUtils.isNotEmpty(esConfig.getUsername()) && StringUtils.isNotEmpty(esConfig.getPassword())) {
                 String tokenStr = esConfig.getUsername() + ":" + esConfig.getPassword();
-                String token = String.valueOf(new BASE64Encoder().encode(tokenStr.getBytes(StandardCharsets.UTF_8)));
+                String token = base64Encoder.encodeToString(tokenStr.getBytes(StandardCharsets.UTF_8));
                 headers.add("Authorization", "Basic " + token);
             }
         }
@@ -214,6 +217,7 @@ public Map<String, ElasticsearchFieldInfo> getMappingMap(String indexName) throw
         JsonObject fields = null;
         Map<String, ElasticsearchFieldInfo> fieldInfos = Maps.newHashMap();
         if (ObjectUtils.isNotEmpty(mappings)) {
+            String MAPPINGS_KEY = "mappings";
             properties = mappings.getAsJsonObject(MAPPINGS_KEY);
         }
         if (ObjectUtils.isNotEmpty(properties)) {
diff --git a/inlong-manager/manager-service/src/test/java/org/apache/inlong/manager/service/resource/sink/Base64CompatibleTest.java b/inlong-manager/manager-service/src/test/java/org/apache/inlong/manager/service/resource/sink/Base64CompatibleTest.java
new file mode 100644
index 00000000000..4659468bff9
--- /dev/null
+++ b/inlong-manager/manager-service/src/test/java/org/apache/inlong/manager/service/resource/sink/Base64CompatibleTest.java
@@ -0,0 +1,42 @@
+/*
+ * 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.inlong.manager.service.resource.sink;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+import sun.misc.BASE64Encoder;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Base64;
+import java.util.Base64.Encoder;
+
+public class Base64CompatibleTest {
+
+    @Test
+    public void base64CompatibleForDifferentVersionTest() {
+        String tokenStr = "root" + ":" + "admin";
+        byte[] tokeBytes = tokenStr.getBytes(StandardCharsets.UTF_8);
+        // token encode by sun.misc.BASE64Encoder, this test will fail if the jdk version is 9 or later
+        // so, this test should be removed when Apache InLong project support jdk 9 or later
+        String tokenOld = String.valueOf(new BASE64Encoder().encode(tokeBytes));
+        // token encode by java.util.Base64.Encoder
+        Encoder encoder = Base64.getEncoder();
+        String tokenNew = encoder.encodeToString(tokeBytes);
+        Assertions.assertEquals(tokenOld, tokenNew);
+    }
+}