Client library compatibility

Elastic Stack Elasticsearch
1

Hi all,
is there any place where I can found which elasticsearch server versions could be used with the client version 0.9?
We have an old application using ES 0.9 with the proper client library (0.9 version) and we would like to upgrade the elasticsearch server without upgrading soon the client library (if possible).
Thanks
Filippo

2

If you are talking about elasticsearch official Java JAR, no you can't do that.
Is that what you are talking about?

3

Thanks for your answer, I'm talking about the client I can find in this artifact:

 <dependency>
        <groupId>org.elasticsearch</groupId>
        <artifactId>elasticsearch</artifactId>
        <version>0.90.2</version>
    </dependency>
4

I confirm that you must update both client and server.