DATAES-809 - Creation of test data may lead to duplicate values.

Original PR: spring-projects#443

Author: sothawo

src/test/java/org/springframework/data/elasticsearch/junit/jupiter/ElasticsearchRestTemplateConfiguration.java

@@ -21,9 +21,13 @@
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.dao.DataAccessResourceFailureException;
 import org.springframework.data.elasticsearch.client.ClientConfiguration;
 import org.springframework.data.elasticsearch.client.RestClients;
 import org.springframework.data.elasticsearch.config.AbstractElasticsearchConfiguration;
+import org.springframework.data.elasticsearch.core.ElasticsearchOperations;
+import org.springframework.data.elasticsearch.core.ElasticsearchRestTemplate;
+import org.springframework.data.elasticsearch.core.convert.ElasticsearchConverter;
 
 /**
  * Configuration for Spring Data Elasticsearch using
@@ -56,4 +60,22 @@ public RestHighLevelClient elasticsearchClient() {
 				.build()) //
 				.rest();
 	}
+
+	@Override
+	public ElasticsearchOperations elasticsearchOperations(ElasticsearchConverter elasticsearchConverter) {
+		RestHighLevelClient client = elasticsearchClient();
+		return new ElasticsearchRestTemplate(client, elasticsearchConverter) {
+			@Override
+			public <T> T execute(ClientCallback<T> callback) {
+				try {
+					return super.execute(callback);
+				} catch (DataAccessResourceFailureException e) {
+					try {
+						Thread.sleep(1_000);
+					} catch (InterruptedException ignored) {}
+					return super.execute(callback);
+				}
+			}
+		};
+	}
 }

src/test/java/org/springframework/data/elasticsearch/repository/support/simple/SimpleElasticsearchRepositoryTests.java

@@ -678,14 +678,18 @@ public void shouldNotFailOnIndexingEmptyList() {
 	}
 
 	private static List<SampleEntity> createSampleEntitiesWithMessage(String message, int numberOfEntities) {
+
 		List<SampleEntity> sampleEntities = new ArrayList<>();
+		long idBase = (long) (Math.random() * 100);
+		long versionBase = System.currentTimeMillis();
+
 		for (int i = 0; i < numberOfEntities; i++) {
-			String documentId = randomNumeric(5);
+			String documentId = String.valueOf(idBase + i);
 			SampleEntity sampleEntity = new SampleEntity();
 			sampleEntity.setId(documentId);
 			sampleEntity.setMessage(message);
 			sampleEntity.setRate(2);
-			sampleEntity.setVersion(System.currentTimeMillis());
+			sampleEntity.setVersion(versionBase + i);
 			sampleEntities.add(sampleEntity);
 		}
 		return sampleEntities;