Adds warning to Java high-level REST client (#2557) (#2607)

Signed-off-by: Fanit Kolchina <[email protected]> (cherry picked from commit 7aa5f40) Co-authored-by: kolchfa-aws <[email protected]>
opensearch-project · Feb 3, 2023 · dc6f5ce · dc6f5ce
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diff --git a/_clients/java-rest-high-level.md b/_clients/java-rest-high-level.md
@@ -6,6 +6,9 @@ nav_order: 60
 
 # Java high-level REST client
 
+The OpenSearch Java high-level REST client will be deprecated starting with OpenSearch version 3.0.0 and will be removed in a future release. We recommend switching to the [Java client]({{site.url}}{{site.baseurl}}/clients/java/) instead.
+{: .warning}
+
 The OpenSearch Java high-level REST client lets you interact with your OpenSearch clusters and indices through Java methods and data structures rather than HTTP methods and JSON.
 
 ## Setup