[hotfix] Fix compatible issue with 1.20

Author: reswqa

flink-connector-elasticsearch-base/src/test/java/org/apache/flink/connector/elasticsearch/sink/ElasticsearchWriterITCase.java

@@ -17,7 +17,6 @@
 
 package org.apache.flink.connector.elasticsearch.sink;
 
-import org.apache.flink.api.common.operators.MailboxExecutor;
 import org.apache.flink.api.connector.sink2.SinkWriter;
 import org.apache.flink.api.connector.sink2.SinkWriter.Context;
 import org.apache.flink.api.java.tuple.Tuple2;
@@ -31,14 +30,13 @@
 import org.apache.flink.metrics.groups.SinkWriterMetricGroup;
 import org.apache.flink.metrics.groups.UnregisteredMetricsGroup;
 import org.apache.flink.metrics.testutils.MetricListener;
+import org.apache.flink.runtime.mailbox.SyncMailboxExecutor;
 import org.apache.flink.runtime.metrics.MetricNames;
 import org.apache.flink.runtime.metrics.groups.InternalSinkWriterMetricGroup;
 import org.apache.flink.runtime.metrics.groups.UnregisteredMetricGroups;
 import org.apache.flink.runtime.testutils.MiniClusterResourceConfiguration;
 import org.apache.flink.test.junit5.MiniClusterExtension;
-import org.apache.flink.util.FlinkRuntimeException;
 import org.apache.flink.util.TestLoggerExtension;
-import org.apache.flink.util.function.ThrowingRunnable;
 
 import org.apache.http.HttpHost;
 import org.elasticsearch.action.ActionListener;
@@ -329,7 +327,7 @@ private static ElasticsearchWriter<Tuple2<Integer, String>> createWriter(
                 new DefaultBulkResponseInspector(),
                 new NetworkClientConfig(null, null, null, null, null, null, null, null),
                 metricGroup,
-                new TestMailbox());
+                new SyncMailboxExecutor());
     }
 
     private TestingSinkWriterMetricGroup getSinkWriterMetricGroup() {
@@ -481,29 +479,4 @@ GetResponse getResponse(String index, int id) throws IOException {
             return client.get(new GetRequest(index, Integer.toString(id)), RequestOptions.DEFAULT);
         }
     }
-
-    private static class TestMailbox implements MailboxExecutor {
-
-        @Override
-        public void execute(
-                ThrowingRunnable<? extends Exception> command,
-                String descriptionFormat,
-                Object... descriptionArgs) {
-            try {
-                command.run();
-            } catch (Exception e) {
-                throw new RuntimeException("Unexpected error", e);
-            }
-        }
-
-        @Override
-        public void yield() throws InterruptedException, FlinkRuntimeException {
-            Thread.sleep(100);
-        }
-
-        @Override
-        public boolean tryYield() throws FlinkRuntimeException {
-            return false;
-        }
-    }
 }