Elasticsearch Java Client known issues

For detailed issues, refer to the Java client repo.

9.x

All 9.x versions of the client previous to, respectively, 9.2.4, 9.1.10 and 9.0.9 are affected by a bug with the new Rest5Client where memory usage is substantially higher than necessary. This problem was fixed in 9.2.4, 9.1.10 and 9.0.9.

9.0.0

The 9.0.0 version of the client uses the new built-in Rest5Client, instead of depending on elasticsearch-rest-client. But the 9.0.0 client still depends on Apache commons-logging, which causes the following exception when not available:

		Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
	at co.elastic.clients.transport.rest5_client.low_level.Rest5Client.<clinit>(Rest5Client.java:115)
	at co.elastic.clients.transport.rest5_client.Rest5ClientTransport.buildRest5Client(Rest5ClientTransport.java:65)
	at co.elastic.clients.transport.rest5_client.Rest5ClientTransport.<init>(Rest5ClientTransport.java:42)
	at co.elastic.clients.transport.ElasticsearchTransportConfig$Default.buildTransport(ElasticsearchTransportConfig.java:110)
	at co.elastic.clients.elasticsearch.ElasticsearchClient.of(ElasticsearchClient.java:190)
		
	

This problem was fixed in 9.0.1.

To fix this issue in 9.0.0 and use the new Rest5Client, add the commons-logging dependency:

		// gradle
implementation("commons-logging:commons-logging:1.3.5")

		<!--maven-->
<dependency>
    <groupId>commons-logging</groupId>
    <artifactId>commons-logging</artifactId>
    <version>1.3.5</version>
</dependency>
		
	

8.16.7

8.16.7 is the first patch released without a matching rest-client version. The elasticsearch-rest-client dependency is missing, causing the following exception:

		Could not resolve dependencies for project
[ERROR] dependency: org.elasticsearch.client:elasticsearch-rest-client:jar:8.16.7 (compile)
[ERROR] 	Could not find artifact org.elasticsearch.client:elasticsearch-rest-client:jar:8.16.7 in central (https://repo.maven.apache.org/maven2)
		
	

To use this version of the client, set the latest available version explicitly in the project:

		// gradle
implementation("org.elasticsearch.client:elasticsearch-rest-client:8.16.6")

		<!--maven-->
<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-client</artifactId>
    <version>8.16.6</version>
</dependency>
		
	