prevent duplicate uri property update

CHANGELOG.md

@@ -14,6 +14,9 @@ and what APIs have changed, if applicable.
 
 ## [Unreleased]
 
+## [29.56.1] - 2024-06-06
+- prevent duplicate uri property update
+
 ## [29.56.0] - 2024-05-30
 - degrade hosts for HTTP/2 stream errors in Degrader and Relative LB.
 
@@ -5695,7 +5698,8 @@ patch operations can re-use these classes for generating patch messages.
 
 ## [0.14.1]
 
-[Unreleased]: https://github.com/linkedin/rest.li/compare/v29.56.0...master
+[Unreleased]: https://github.com/linkedin/rest.li/compare/v29.56.1...master
+[29.56.1]: https://github.com/linkedin/rest.li/compare/v29.56.0...v29.56.1
 [29.56.0]: https://github.com/linkedin/rest.li/compare/v29.55.0...v29.56.0
 [29.55.0]: https://github.com/linkedin/rest.li/compare/v29.54.0...v29.55.0
 [29.54.0]: https://github.com/linkedin/rest.li/compare/v29.53.1...v29.54.0

d2/src/main/java/com/linkedin/d2/balancer/simple/UriLoadBalancerSubscriber.java

@@ -59,6 +59,17 @@ protected void handlePut(final String cluster, final UriProperties uriProperties
     {
       String clusterName = uriProperties.getClusterName();
 
+      Optional<UriProperties> currentUriProperties = Optional.ofNullable(
+          _simpleLoadBalancerState.getUriProperties(clusterName)).map(LoadBalancerStateItem::getProperty);
+      if (currentUriProperties.isPresent() && currentUriProperties.get().equals(uriProperties))
+      {
+        _log.debug("For cluster: {}, received duplicate uri properties: {}", clusterName, uriProperties);
+        return;
+      }
+
+      _log.debug("For cluster: {}, received new uri properties: {}\nOld properties: {}", clusterName, uriProperties,
+          currentUriProperties);
+
       Set<String> serviceNames = _simpleLoadBalancerState.getServicesPerCluster().get(clusterName);
       //updates all the services that these uris provide
       if (serviceNames != null)

gradle.properties

@@ -1,4 +1,4 @@
-version=29.56.0
+version=29.56.1
 group=com.linkedin.pegasus
 org.gradle.configureondemand=true
 org.gradle.parallel=true