Fix Redis Lettuce passwordless auto-config bean collision (#49293)

Author: Copilot

sdk/spring/CHANGELOG.md

@@ -1,13 +1,19 @@
 # Release History
 ## 7.4.0-beta.1 (Unreleased)
 
-### Features Added
+### Spring Cloud Azure Autoconfigure
 
-### Breaking Changes
+This section includes changes in `spring-cloud-azure-autoconfigure` module.
 
-### Bugs Fixed
+#### Features Added
 
-### Other Changes
+#### Breaking Changes
+
+#### Bugs Fixed
+
+- Fixed Redis Lettuce passwordless autoconfiguration so a user-defined `LettuceClientConfigurationBuilderCustomizer` no longer suppresses the Azure customizer bean that configures Azure Redis credentials and RESP2 support.
+
+#### Other Changes
 
 ## 7.3.0 (2026-05-27)
 - This release is compatible with Spring Boot 4.0.0-4.0.6. (Note: 4.0.x (x>6) should be supported, but they aren't tested with this release.)

sdk/spring/spring-cloud-azure-autoconfigure/src/main/java/com/azure/spring/cloud/autoconfigure/implementation/data/redis/AzureLettucePasswordlessAutoConfiguration.java

@@ -59,7 +59,7 @@ AzureRedisCredentials azureRedisCredentials(DataRedisProperties redisProperties,
     }
 
     @Bean(name = "azureLettuceClientConfigurationBuilderCustomizer")
-    @ConditionalOnMissingBean
+    @ConditionalOnMissingBean(name = "azureLettuceClientConfigurationBuilderCustomizer")
     LettuceClientConfigurationBuilderCustomizer azureLettuceClientConfigurationBuilderCustomizer(AzureRedisCredentials azureRedisCredentials) {
         return builder -> builder.redisCredentialsProviderFactory(new RedisCredentialsProviderFactory() {
 

sdk/spring/spring-cloud-azure-autoconfigure/src/test/java/com/azure/spring/cloud/autoconfigure/implementation/data/redis/AzureLettucePasswordlessAutoConfigurationTest.java

@@ -8,6 +8,7 @@
 import io.lettuce.core.RedisCredentials;
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.data.redis.autoconfigure.LettuceClientConfigurationBuilderCustomizer;
 import org.springframework.boot.test.context.FilteredClassLoader;
 import org.springframework.boot.test.context.runner.ApplicationContextRunner;
 import org.springframework.data.redis.connection.lettuce.LettuceConnection;
@@ -75,4 +76,20 @@ void configureWithPasswordlessEnabled() {
             });
     }
 
+    @Test
+    void configureWithUserDefinedLettuceCustomizer() {
+        this.contextRunner
+            .withBean("userLettuceClientConfigurationBuilderCustomizer", LettuceClientConfigurationBuilderCustomizer.class,
+                () -> builder -> { })
+            .withPropertyValues(
+                "spring.data.redis.azure.passwordless-enabled=true",
+                "spring.data.redis.host=localhost",
+                "spring.data.redis.username=azure-username"
+            )
+            .run(context -> {
+                assertThat(context).hasBean("azureLettuceClientConfigurationBuilderCustomizer");
+                assertThat(context.getBeansOfType(LettuceClientConfigurationBuilderCustomizer.class)).hasSize(2);
+            });
+    }
+
 }