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Elasticsearch Java Client known issues

For detailed issues, refer to the Java client repo.

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 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>