[FLINK-30162] Remove unused stuff
diff --git a/flink-connector-elasticsearch-base/src/main/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchApiCallBridge.java b/flink-connector-elasticsearch-base/src/main/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchApiCallBridge.java
index 9b4f9fb..8061d04 100644
--- a/flink-connector-elasticsearch-base/src/main/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchApiCallBridge.java
+++ b/flink-connector-elasticsearch-base/src/main/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchApiCallBridge.java
@@ -27,7 +27,6 @@
 
 import java.io.IOException;
 import java.io.Serializable;
-import java.util.Map;
 import java.util.concurrent.atomic.AtomicLong;
 
 /**
@@ -49,10 +48,9 @@
     /**
      * Creates an Elasticsearch client implementing {@link AutoCloseable}.
      *
-     * @param clientConfig The configuration to use when constructing the client.
      * @return The created client.
      */
-    C createClient(Map<String, String> clientConfig);
+    C createClient();
 
     /**
      * Creates a {@link BulkProcessor.Builder} for creating the bulk processor.
diff --git a/flink-connector-elasticsearch-base/src/main/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkBase.java b/flink-connector-elasticsearch-base/src/main/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkBase.java
index c0fad6f..51c5859 100644
--- a/flink-connector-elasticsearch-base/src/main/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkBase.java
+++ b/flink-connector-elasticsearch-base/src/main/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkBase.java
@@ -142,15 +142,6 @@
     // ------------------------------------------------------------------------
 
     /**
-     * The config map that contains configuration for the bulk flushing behaviours.
-     *
-     * <p>For {@link org.elasticsearch.client.transport.TransportClient} based implementations, this
-     * config map would also contain Elasticsearch-shipped configuration, and therefore this config
-     * map would also be forwarded when creating the Elasticsearch client.
-     */
-    private final Map<String, String> userConfig;
-
-    /**
      * The function that is used to construct multiple {@link ActionRequest ActionRequests} from
      * each incoming element.
      */
@@ -296,8 +287,6 @@
         } else {
             bulkProcessorFlushBackoffPolicy = null;
         }
-
-        this.userConfig = userConfig;
     }
 
     /**
@@ -313,7 +302,7 @@
 
     @Override
     public void open(Configuration parameters) throws Exception {
-        client = callBridge.createClient(userConfig);
+        client = callBridge.createClient();
         callBridge.verifyClientConnection(client);
         bulkProcessor = buildBulkProcessor(new BulkProcessorListener());
         requestIndexer =
diff --git a/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkBaseTest.java b/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkBaseTest.java
index 87480c5..25cb18b 100644
--- a/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkBaseTest.java
+++ b/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkBaseTest.java
@@ -593,7 +593,7 @@
         private static final long serialVersionUID = -4272760730959041699L;
 
         @Override
-        public Client createClient(Map<String, String> clientConfig) {
+        public Client createClient() {
             return mock(Client.class);
         }
 
diff --git a/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkTestBase.java b/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkTestBase.java
index 5c3d4ec..71a1e40 100644
--- a/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkTestBase.java
+++ b/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/ElasticsearchSinkTestBase.java
@@ -27,9 +27,7 @@
 import org.elasticsearch.client.RestHighLevelClient;
 
 import java.util.Collections;
-import java.util.HashMap;
 import java.util.List;
-import java.util.Map;
 import java.util.function.Function;
 
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
@@ -46,32 +44,18 @@
 
     protected abstract RestHighLevelClient getClient();
 
-    protected abstract String getClusterName();
-
     /** Tests that the Elasticsearch sink works properly with json. */
     public void runElasticsearchSinkTest() throws Exception {
         runElasticSearchSinkTest(
                 "elasticsearch-sink-test-json-index", SourceSinkDataTestKit::getJsonSinkFunction);
     }
 
-    /** Tests that the Elasticsearch sink works properly with cbor. */
-    public void runElasticsearchSinkCborTest() throws Exception {
-        runElasticSearchSinkTest(
-                "elasticsearch-sink-test-cbor-index", SourceSinkDataTestKit::getCborSinkFunction);
-    }
-
     /** Tests that the Elasticsearch sink works properly with smile. */
     public void runElasticsearchSinkSmileTest() throws Exception {
         runElasticSearchSinkTest(
                 "elasticsearch-sink-test-smile-index", SourceSinkDataTestKit::getSmileSinkFunction);
     }
 
-    /** Tests that the Elasticsearch sink works properly with yaml. */
-    public void runElasticsearchSinkYamlTest() throws Exception {
-        runElasticSearchSinkTest(
-                "elasticsearch-sink-test-yaml-index", SourceSinkDataTestKit::getYamlSinkFunction);
-    }
-
     private void runElasticSearchSinkTest(
             String index,
             Function<String, ElasticsearchSinkFunction<Tuple2<Integer, String>>> functionFactory)
@@ -81,9 +65,7 @@
         DataStreamSource<Tuple2<Integer, String>> source =
                 env.addSource(new SourceSinkDataTestKit.TestDataSourceFunction());
 
-        source.addSink(
-                createElasticsearchSinkForEmbeddedNode(
-                        1, getClusterName(), functionFactory.apply(index)));
+        source.addSink(createElasticsearchSinkForEmbeddedNode(1, functionFactory.apply(index)));
 
         env.execute("Elasticsearch Sink Test");
 
@@ -103,10 +85,7 @@
         assertThatThrownBy(
                         () ->
                                 createElasticsearchSink(
-                                        1,
-                                        getClusterName(),
-                                        null,
-                                        SourceSinkDataTestKit.getJsonSinkFunction("test")))
+                                        1, null, SourceSinkDataTestKit.getJsonSinkFunction("test")))
                 .isInstanceOfAny(IllegalArgumentException.class, NullPointerException.class);
     }
 
@@ -118,7 +97,6 @@
                         () ->
                                 createElasticsearchSink(
                                         1,
-                                        getClusterName(),
                                         Collections.emptyList(),
                                         SourceSinkDataTestKit.getJsonSinkFunction("test")))
                 .isInstanceOf(IllegalArgumentException.class);
@@ -134,7 +112,6 @@
         source.addSink(
                 createElasticsearchSinkForNode(
                         1,
-                        "invalid-cluster-name",
                         SourceSinkDataTestKit.getJsonSinkFunction("test"),
                         "123.123.123.123")); // incorrect ip address
 
@@ -142,22 +119,9 @@
                 .isInstanceOf(JobExecutionException.class);
     }
 
-    /** Utility method to create a user config map. */
-    protected Map<String, String> createUserConfig(int bulkFlushMaxActions, String clusterName) {
-        Map<String, String> userConfig = new HashMap<>();
-        userConfig.put("cluster.name", clusterName);
-        userConfig.put(
-                ElasticsearchSinkBase.CONFIG_KEY_BULK_FLUSH_MAX_ACTIONS,
-                String.valueOf(bulkFlushMaxActions));
-        userConfig.put("transport.tcp.connect_timeout", "5s");
-
-        return userConfig;
-    }
-
     /** Creates a version-specific Elasticsearch sink, using arbitrary transport addresses. */
     protected abstract ElasticsearchSinkBase<Tuple2<Integer, String>, C> createElasticsearchSink(
             int bulkFlushMaxActions,
-            String clusterName,
             List<A> addresses,
             ElasticsearchSinkFunction<Tuple2<Integer, String>> elasticsearchSinkFunction);
 
@@ -166,14 +130,12 @@
      * node.
      *
      * <p>This case is singled out from {@link
-     * ElasticsearchSinkTestBase#createElasticsearchSink(int, String, List,
-     * ElasticsearchSinkFunction)} because the Elasticsearch Java API to do so is incompatible
-     * across different versions.
+     * ElasticsearchSinkTestBase#createElasticsearchSink(int, List, ElasticsearchSinkFunction)}
+     * because the Elasticsearch Java API to do so is incompatible across different versions.
      */
     protected abstract ElasticsearchSinkBase<Tuple2<Integer, String>, C>
             createElasticsearchSinkForEmbeddedNode(
                     int bulkFlushMaxActions,
-                    String clusterName,
                     ElasticsearchSinkFunction<Tuple2<Integer, String>> elasticsearchSinkFunction)
                     throws Exception;
 
@@ -183,7 +145,6 @@
     protected abstract ElasticsearchSinkBase<Tuple2<Integer, String>, C>
             createElasticsearchSinkForNode(
                     int bulkFlushMaxActions,
-                    String clusterName,
                     ElasticsearchSinkFunction<Tuple2<Integer, String>> elasticsearchSinkFunction,
                     String ipAddress)
                     throws Exception;
diff --git a/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/EmbeddedElasticsearchNodeEnvironment.java b/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/EmbeddedElasticsearchNodeEnvironment.java
deleted file mode 100644
index 738ddd6..0000000
--- a/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/EmbeddedElasticsearchNodeEnvironment.java
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * 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.streaming.connectors.elasticsearch;
-
-import org.elasticsearch.client.Client;
-
-import java.io.File;
-
-/**
- * The {@link EmbeddedElasticsearchNodeEnvironment} is used in integration tests to manage
- * Elasticsearch embedded nodes.
- *
- * <p>NOTE: In order for {@link ElasticsearchSinkTestBase} to dynamically load version-specific
- * implementations for the tests, concrete implementations must be named {@code
- * EmbeddedElasticsearchNodeEnvironmentImpl}. It must also be located under the same package. The
- * intentional package-private accessibility of this interface enforces that.
- */
-public interface EmbeddedElasticsearchNodeEnvironment {
-
-    /**
-     * Start an embedded Elasticsearch node instance. Calling this method multiple times
-     * consecutively should not restart the embedded node.
-     *
-     * @param tmpDataFolder The temporary data folder for the embedded node to use.
-     * @param clusterName The name of the cluster that the embedded node should be configured with.
-     */
-    void start(File tmpDataFolder, String clusterName) throws Exception;
-
-    /** Close the embedded node, if previously started. */
-    void close() throws Exception;
-
-    /**
-     * Returns a client to communicate with the embedded node.
-     *
-     * @return Client to communicate with the embedded node. Returns {@code null} if the embedded
-     *     node wasn't started or is closed.
-     */
-    Client getClient();
-}
diff --git a/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/testutils/ElasticsearchResource.java b/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/testutils/ElasticsearchResource.java
deleted file mode 100644
index f92bcf1..0000000
--- a/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/testutils/ElasticsearchResource.java
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- * 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.streaming.connectors.elasticsearch.testutils;
-
-import org.apache.flink.streaming.connectors.elasticsearch.EmbeddedElasticsearchNodeEnvironment;
-import org.apache.flink.util.InstantiationUtil;
-
-import org.elasticsearch.action.ActionFuture;
-import org.elasticsearch.action.admin.cluster.health.ClusterHealthRequestBuilder;
-import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
-import org.elasticsearch.client.AdminClient;
-import org.elasticsearch.client.Client;
-import org.elasticsearch.client.ClusterAdminClient;
-import org.elasticsearch.common.unit.TimeValue;
-import org.junit.rules.ExternalResource;
-import org.junit.rules.TemporaryFolder;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import static org.assertj.core.api.Assertions.assertThat;
-
-/** A resource that starts an embedded elasticsearch cluster. */
-public class ElasticsearchResource extends ExternalResource {
-    private static final Logger LOG = LoggerFactory.getLogger(ElasticsearchResource.class);
-    private EmbeddedElasticsearchNodeEnvironment embeddedNodeEnv;
-    private final TemporaryFolder tempFolder = new TemporaryFolder();
-
-    private final String clusterName;
-
-    public ElasticsearchResource(String clusterName) {
-        this.clusterName = clusterName;
-    }
-
-    @Override
-    protected void before() throws Throwable {
-
-        LOG.info("-------------------------------------------------------------------------");
-        LOG.info("    Starting embedded Elasticsearch node ");
-        LOG.info("-------------------------------------------------------------------------");
-
-        // dynamically load version-specific implementation of the Elasticsearch embedded node
-        // environment
-        Class<?> clazz =
-                Class.forName(
-                        "org.apache.flink.streaming.connectors.elasticsearch.EmbeddedElasticsearchNodeEnvironmentImpl");
-        embeddedNodeEnv =
-                (EmbeddedElasticsearchNodeEnvironment) InstantiationUtil.instantiate(clazz);
-
-        tempFolder.create();
-        embeddedNodeEnv.start(tempFolder.newFolder(), clusterName);
-
-        waitForCluster();
-    }
-
-    /** Blocks until the cluster is ready and data nodes/nodes are live. */
-    private void waitForCluster() {
-        AdminClient adminClient = embeddedNodeEnv.getClient().admin();
-        ClusterAdminClient clusterAdminClient = adminClient.cluster();
-
-        ClusterHealthRequestBuilder requestBuilder = clusterAdminClient.prepareHealth("_all");
-        requestBuilder = requestBuilder.setTimeout(TimeValue.timeValueSeconds(120));
-
-        ActionFuture<ClusterHealthResponse> healthFuture =
-                clusterAdminClient.health(requestBuilder.request());
-
-        ClusterHealthResponse health = healthFuture.actionGet(TimeValue.timeValueSeconds(120));
-
-        assertThat(health.getNumberOfNodes()).isGreaterThanOrEqualTo(1);
-        assertThat(health.getNumberOfDataNodes()).isGreaterThanOrEqualTo(1);
-    }
-
-    @Override
-    protected void after() {
-
-        LOG.info("-------------------------------------------------------------------------");
-        LOG.info("    Shutting down embedded Elasticsearch node ");
-        LOG.info("-------------------------------------------------------------------------");
-
-        try {
-            embeddedNodeEnv.close();
-            tempFolder.delete();
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    public Client getClient() {
-        return embeddedNodeEnv.getClient();
-    }
-}
diff --git a/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/testutils/SourceSinkDataTestKit.java b/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/testutils/SourceSinkDataTestKit.java
index 33023a7..c286c90 100644
--- a/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/testutils/SourceSinkDataTestKit.java
+++ b/flink-connector-elasticsearch-base/src/test/java/org/apache/flink/streaming/connectors/elasticsearch/testutils/SourceSinkDataTestKit.java
@@ -74,11 +74,6 @@
         }
     }
 
-    public static ElasticsearchSinkFunction<Tuple2<Integer, String>> getCborSinkFunction(
-            String index) {
-        return new TestElasticsearchSinkFunction(index, XContentFactory::cborBuilder);
-    }
-
     public static ElasticsearchSinkFunction<Tuple2<Integer, String>> getJsonSinkFunction(
             String index) {
         return new TestElasticsearchSinkFunction(index, XContentFactory::jsonBuilder);
@@ -89,11 +84,6 @@
         return new TestElasticsearchSinkFunction(index, XContentFactory::smileBuilder);
     }
 
-    public static ElasticsearchSinkFunction<Tuple2<Integer, String>> getYamlSinkFunction(
-            String index) {
-        return new TestElasticsearchSinkFunction(index, XContentFactory::yamlBuilder);
-    }
-
     private static class TestElasticsearchSinkFunction
             implements ElasticsearchSinkFunction<Tuple2<Integer, String>> {
         private static final long serialVersionUID = 1L;
diff --git a/flink-connector-elasticsearch6/src/main/java/org/apache/flink/streaming/connectors/elasticsearch6/Elasticsearch6ApiCallBridge.java b/flink-connector-elasticsearch6/src/main/java/org/apache/flink/streaming/connectors/elasticsearch6/Elasticsearch6ApiCallBridge.java
index bd5d5a6..c923db3 100644
--- a/flink-connector-elasticsearch6/src/main/java/org/apache/flink/streaming/connectors/elasticsearch6/Elasticsearch6ApiCallBridge.java
+++ b/flink-connector-elasticsearch6/src/main/java/org/apache/flink/streaming/connectors/elasticsearch6/Elasticsearch6ApiCallBridge.java
@@ -38,7 +38,6 @@
 
 import java.io.IOException;
 import java.util.List;
-import java.util.Map;
 import java.util.concurrent.atomic.AtomicLong;
 
 /** Implementation of {@link ElasticsearchApiCallBridge} for Elasticsearch 6 and later versions. */
@@ -63,7 +62,7 @@
     }
 
     @Override
-    public RestHighLevelClient createClient(Map<String, String> clientConfig) {
+    public RestHighLevelClient createClient() {
         RestClientBuilder builder =
                 RestClient.builder(httpHosts.toArray(new HttpHost[httpHosts.size()]));
         restClientFactory.configureRestClientBuilder(builder);
diff --git a/flink-connector-elasticsearch6/src/test/java/org/apache/flink/streaming/connectors/elasticsearch6/ElasticsearchSinkITCase.java b/flink-connector-elasticsearch6/src/test/java/org/apache/flink/streaming/connectors/elasticsearch6/ElasticsearchSinkITCase.java
index 3115481..68bb99e 100644
--- a/flink-connector-elasticsearch6/src/test/java/org/apache/flink/streaming/connectors/elasticsearch6/ElasticsearchSinkITCase.java
+++ b/flink-connector-elasticsearch6/src/test/java/org/apache/flink/streaming/connectors/elasticsearch6/ElasticsearchSinkITCase.java
@@ -49,11 +49,6 @@
                     DockerImageVersions.ELASTICSEARCH_6, LOG);
 
     @Override
-    protected String getClusterName() {
-        return "docker-cluster";
-    }
-
-    @Override
     protected final RestHighLevelClient getClient() {
         return new RestHighLevelClient(
                 RestClient.builder(HttpHost.create(elasticsearchContainer.getHttpHostAddress())));
@@ -88,7 +83,6 @@
     protected ElasticsearchSinkBase<Tuple2<Integer, String>, RestHighLevelClient>
             createElasticsearchSink(
                     int bulkFlushMaxActions,
-                    String clusterName,
                     List<HttpHost> httpHosts,
                     ElasticsearchSinkFunction<Tuple2<Integer, String>> elasticsearchSinkFunction) {
 
@@ -103,12 +97,10 @@
     protected ElasticsearchSinkBase<Tuple2<Integer, String>, RestHighLevelClient>
             createElasticsearchSinkForEmbeddedNode(
                     int bulkFlushMaxActions,
-                    String clusterName,
                     ElasticsearchSinkFunction<Tuple2<Integer, String>> elasticsearchSinkFunction) {
 
         return createElasticsearchSinkForNode(
                 bulkFlushMaxActions,
-                clusterName,
                 elasticsearchSinkFunction,
                 elasticsearchContainer.getHttpHostAddress());
     }
@@ -117,7 +109,6 @@
     protected ElasticsearchSinkBase<Tuple2<Integer, String>, RestHighLevelClient>
             createElasticsearchSinkForNode(
                     int bulkFlushMaxActions,
-                    String clusterName,
                     ElasticsearchSinkFunction<Tuple2<Integer, String>> elasticsearchSinkFunction,
                     String hostAddress) {
 
diff --git a/flink-connector-elasticsearch7/src/main/java/org/apache/flink/streaming/connectors/elasticsearch7/Elasticsearch7ApiCallBridge.java b/flink-connector-elasticsearch7/src/main/java/org/apache/flink/streaming/connectors/elasticsearch7/Elasticsearch7ApiCallBridge.java
index b076a30..37a2d59 100644
--- a/flink-connector-elasticsearch7/src/main/java/org/apache/flink/streaming/connectors/elasticsearch7/Elasticsearch7ApiCallBridge.java
+++ b/flink-connector-elasticsearch7/src/main/java/org/apache/flink/streaming/connectors/elasticsearch7/Elasticsearch7ApiCallBridge.java
@@ -39,7 +39,6 @@
 
 import java.io.IOException;
 import java.util.List;
-import java.util.Map;
 import java.util.concurrent.atomic.AtomicLong;
 
 /** Implementation of {@link ElasticsearchApiCallBridge} for Elasticsearch 7 and later versions. */
@@ -64,7 +63,7 @@
     }
 
     @Override
-    public RestHighLevelClient createClient(Map<String, String> clientConfig) {
+    public RestHighLevelClient createClient() {
         RestClientBuilder builder =
                 RestClient.builder(httpHosts.toArray(new HttpHost[httpHosts.size()]));
         restClientFactory.configureRestClientBuilder(builder);
diff --git a/flink-connector-elasticsearch7/src/test/java/org/apache/flink/streaming/connectors/elasticsearch7/ElasticsearchSinkITCase.java b/flink-connector-elasticsearch7/src/test/java/org/apache/flink/streaming/connectors/elasticsearch7/ElasticsearchSinkITCase.java
index 026d7d9..55ff8ed 100644
--- a/flink-connector-elasticsearch7/src/test/java/org/apache/flink/streaming/connectors/elasticsearch7/ElasticsearchSinkITCase.java
+++ b/flink-connector-elasticsearch7/src/test/java/org/apache/flink/streaming/connectors/elasticsearch7/ElasticsearchSinkITCase.java
@@ -49,11 +49,6 @@
                     DockerImageVersions.ELASTICSEARCH_7, LOG);
 
     @Override
-    protected String getClusterName() {
-        return "docker-cluster";
-    }
-
-    @Override
     protected final RestHighLevelClient getClient() {
         return new RestHighLevelClient(
                 RestClient.builder(HttpHost.create(elasticsearchContainer.getHttpHostAddress())));
@@ -88,7 +83,6 @@
     protected ElasticsearchSinkBase<Tuple2<Integer, String>, RestHighLevelClient>
             createElasticsearchSink(
                     int bulkFlushMaxActions,
-                    String clusterName,
                     List<HttpHost> httpHosts,
                     ElasticsearchSinkFunction<Tuple2<Integer, String>> elasticsearchSinkFunction) {
 
@@ -103,12 +97,10 @@
     protected ElasticsearchSinkBase<Tuple2<Integer, String>, RestHighLevelClient>
             createElasticsearchSinkForEmbeddedNode(
                     int bulkFlushMaxActions,
-                    String clusterName,
                     ElasticsearchSinkFunction<Tuple2<Integer, String>> elasticsearchSinkFunction) {
 
         return createElasticsearchSinkForNode(
                 bulkFlushMaxActions,
-                clusterName,
                 elasticsearchSinkFunction,
                 elasticsearchContainer.getHttpHostAddress());
     }
@@ -117,7 +109,6 @@
     protected ElasticsearchSinkBase<Tuple2<Integer, String>, RestHighLevelClient>
             createElasticsearchSinkForNode(
                     int bulkFlushMaxActions,
-                    String clusterName,
                     ElasticsearchSinkFunction<Tuple2<Integer, String>> elasticsearchSinkFunction,
                     String hostAddress) {