adding logs to detect ZK use. (#1140)

* adding logs to detect ZK use.

* reduced logs

* adding application name

* updating version to resolve conflicts

* changing error to warn

---------

Co-authored-by: abhishek bharadwaj <abharadwaj@linkedin.com>

Author: abhics1002

CHANGELOG.md

@@ -14,6 +14,9 @@ and what APIs have changed, if applicable.
 
 ## [Unreleased]
 
+## [29.85.2] - 2026-02-13
+Adding logging in D2 client for ZK usages
+
 ## [29.85.1] - 2026-02-12
 Add public needScatterGather method to RestClient
 
@@ -5958,7 +5961,8 @@ patch operations can re-use these classes for generating patch messages.
 
 ## [0.14.1]
 
-[Unreleased]: https://github.com/linkedin/rest.li/compare/v29.85.1...master
+[Unreleased]: https://github.com/linkedin/rest.li/compare/v29.85.2...master
+[29.85.2]: https://github.com/linkedin/rest.li/compare/v29.85.1...v29.85.2
 [29.85.1]: https://github.com/linkedin/rest.li/compare/v29.85.0...v29.85.1
 [29.85.0]: https://github.com/linkedin/rest.li/compare/v29.84.1...v29.85.0
 [29.84.1]: https://github.com/linkedin/rest.li/compare/v29.84.0...v29.84.1
@@ -7212,4 +7216,4 @@ patch operations can re-use these classes for generating patch messages.
 [0.14.4]: https://github.com/linkedin/rest.li/compare/v0.14.3...v0.14.4
 [0.14.3]: https://github.com/linkedin/rest.li/compare/v0.14.2...v0.14.3
 [0.14.2]: https://github.com/linkedin/rest.li/compare/v0.14.1...v0.14.2
-[0.14.1]: https://github.com/linkedin/rest.li/tree/v0.14.1
+[0.14.1]: https://github.com/linkedin/rest.li/tree/v0.14.1

d2/src/main/java/com/linkedin/d2/balancer/D2ClientBuilder.java

@@ -27,6 +27,7 @@
 import com.linkedin.d2.balancer.clients.DynamicClient;
 import com.linkedin.d2.balancer.clients.RequestTimeoutClient;
 import com.linkedin.d2.balancer.util.D2CalleeInfoRecorder;
+import com.linkedin.d2.discovery.util.D2Utils;
 import java.time.Duration;
 import javax.annotation.Nonnull;
 import com.linkedin.d2.balancer.clients.RetryClient;
@@ -269,6 +270,14 @@ public D2Client build()
           + "Using in stack: {}", stackTrace);
     }
 
+    // Adding logs to detect if any non-INDIS load balancer factory is being used.
+    if (!loadBalancerFactory.isIndisOnly())
+    {
+      LOG.warn("[ACTION REQUIRED] Zookeeper-based D2 Client "
+          + "is deprecated (unless talking to a locally-deployed ZK, or for testing EI ZK) and must be migrated to INDIS. "
+          + "See instructions at go/onboardindis , application identity: ", D2Utils.getAppIdentityName());
+    }
+
     if (loadBalancerFactory.isIndisOnly() && cfg.xdsServer == null)
     {
       throw new IllegalStateException("xdsServer is null. Call setXdsServer with a valid indis server address. "

gradle.properties

@@ -1,4 +1,4 @@
-version=29.85.1
+version=29.85.2
 group=com.linkedin.pegasus
 org.gradle.configureondemand=true
 org.gradle.parallel=true