Elasticsearch Client 8.9.0 breaks with SpringBoot 3.1

[fabian-froehlich]

Java API client version

8.9.0

Java version

17

Elasticsearch Version

8.9.0

Problem description

There seems to be a breaking change in the API of the Elasticsearch Java Client in 8.9.0 which seems to be introduced in #584.
Boot's inner class ElasticsearchTransportConfiguration inside ElasticsearchClientConfigurations tries to creates an RestClientTransport by passing TransportOptions. But due to the change it now expects a RestClientOptions.

Is it possible to make a hotfix to make it compatible with SpringBoot again?

***************************
APPLICATION FAILED TO START
***************************

Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

    org.springframework.boot.autoconfigure.elasticsearch.ElasticsearchClientConfigurations$ElasticsearchTransportConfiguration.restClientTransport(ElasticsearchClientConfigurations.java:91)

The following method did not exist:

    'void co.elastic.clients.transport.rest_client.RestClientTransport.<init>(org.elasticsearch.client.RestClient, co.elastic.clients.json.JsonpMapper, co.elastic.clients.transport.TransportOptions)'

The calling method's class, org.springframework.boot.autoconfigure.elasticsearch.ElasticsearchClientConfigurations$ElasticsearchTransportConfiguration, was loaded from the following location:

    jar:file:/C:/Users/User/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/3.1.2/spring-boot-autoconfigure-3.1.2.jar!/org/springframework/boot/autoconfigure/elasticsearch/ElasticsearchClientConfigurations$ElasticsearchTransportConfiguration.class

The called method's class, co.elastic.clients.transport.rest_client.RestClientTransport, is available from the following locations:

    jar:file:/C:/Users/User/.m2/repository/co/elastic/clients/elasticsearch-java/8.9.0/elasticsearch-java-8.9.0.jar!/co/elastic/clients/transport/rest_client/RestClientTransport.class

The called method's class hierarchy was loaded from the following locations:

    co.elastic.clients.transport.rest_client.RestClientTransport: file:/C:/Users/User/.m2/repository/co/elastic/clients/elasticsearch-java/8.9.0/elasticsearch-java-8.9.0.jar
    co.elastic.clients.transport.ElasticsearchTransportBase: file:/C:/Users/User/.m2/repository/co/elastic/clients/elasticsearch-java/8.9.0/elasticsearch-java-8.9.0.jar


Action:

Correct the classpath of your application so that it contains compatible versions of the classes org.springframework.boot.autoconfigure.elasticsearch.ElasticsearchClientConfigurations$ElasticsearchTransportConfiguration and co.elastic.clients.transport.rest_client.RestClientTransport

[fabian-froehlich]

I raised an issue at spring-boot.
The want to support 8.9.0 with the next minor version of Boot (3.2.0), which is planned for 23. november.

But there is an workaround available in the issue.