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1.1. Compatibility
The Java High Level REST Client requires at least Java 1.8 and depends on the
Elasticsearch core project. The client version is the same as the Elasticsearch
version that the client was developed for. It accepts the same request arguments
as the TransportClient and returns the same response objects. See the
Section 24, “Migration Guide” if you need to migrate an application from
TransportClient to the new REST client.
The High Level Client is guaranteed to be able to communicate with any
Elasticsearch node running on the same major version and greater or equal minor
version. It doesn’t need to be in the same minor version as the Elasticsearch
nodes it communicates with, as it is forward compatible meaning that it supports
communicating with later versions of Elasticsearch than the one it was developed
for.
The 6.0 client is able to communicate with any 6.x Elasticsearch node, while the
6.1 client is for sure able to communicate with 6.1, 6.2 and any later 6.x version,
but there may be incompatibility issues when communicating with a previous
Elasticsearch node version, for instance between 6.1 and 6.0, in case the 6.1
client supports new request body fields for some APIs that are not known by the
6.0 node(s).
It is recommended to upgrade the High Level Client when upgrading the
Elasticsearch cluster to a new major version, as REST API breaking changes may
cause unexpected results depending on the node that is hit by the request, and
newly added APIs will only be supported by the newer version of the client. The
client should always be updated last, once all of the nodes in the cluster have
been upgraded to the new major version.
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Java High Level REST Client
1.2. Javadoc
The javadoc for the REST high level client can be found at {rest-high-level-clientjavadoc}/index.html.
1.3. Maven Repository
The high-level Java REST client is hosted on Maven Central1
. The minimum Java
version required is 1.8.
The High Level REST Client is subject to the same release cycle as Elasticsearch.
Replace the version with the desired client version.
If you are looking for a SNAPSHOT version, you should add our snapshot
repository to your Maven config
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