You can use the Java client in multiple ways:
Obtaining an Elasticsearch
Client is simple. The most common way to
get a client is by creating a
that connects to a cluster.
The client must have the same major version (e.g.
5.x) as the
nodes in the cluster. Clients may connect to clusters which have a different
minor version (e.g.
2.3.x) but it is possible that new functionality may not
be supported. Ideally, the client should have the same version as the
We plan on deprecating the
TransportClient in Elasticsearch 7.0 and removing
it completely in 8.0. Instead, you should be using the
Java High Level REST Client, which executes
HTTP requests rather than serialized Java requests. The
migration guide describes
all the steps needed to migrate.
The Java High Level REST Client currently has support for the more commonly used APIs, but there are a lot more that still need to be added. You can help us prioritise by telling us which missing APIs you need for your application by adding a comment to this issue: Java high-level REST client completeness.
Any missing APIs can always be implemented today by using the low level Java REST Client with JSON request and response bodies.