Add defensive warning for multiple Feign Client beans to avoid potential resource exhaustion

spring-cloud-openfeign-core/src/main/java/org/springframework/cloud/openfeign/FeignClientFactory.java

@@ -44,21 +44,21 @@ public FeignClientFactory() {
 	}
 
 	public FeignClientFactory(
-			Map<String, ApplicationContextInitializer<GenericApplicationContext>> applicationContextInitializers) {
+		Map<String, ApplicationContextInitializer<GenericApplicationContext>> applicationContextInitializers) {
 		super(FeignClientsConfiguration.class, "spring.cloud.openfeign", "spring.cloud.openfeign.client.name",
-				applicationContextInitializers);
+			applicationContextInitializers);
 	}
 
 	public <T> @Nullable T getInstanceWithoutAncestors(String name, Class<T> type) {
 		try {
 			return BeanFactoryUtils.beanOfType(getContext(name), type);
-		}
-		catch (BeansException ex) {
+		} catch (BeansException ex) {
 			return null;
 		}
 	}
 
-	@Nullable public <T> Map<String, T> getInstancesWithoutAncestors(String name, Class<T> type) {
+	@Nullable
+	public <T> Map<String, T> getInstancesWithoutAncestors(String name, Class<T> type) {
 		return getContext(name).getBeansOfType(type);
 	}
 
@@ -71,8 +71,8 @@ public FeignClientFactory withApplicationContextInitializers(Map<String, Object>
 		Map<String, ApplicationContextInitializer<GenericApplicationContext>> convertedInitializers = new HashMap<>();
 		applicationContextInitializers.keySet()
 			.forEach(contextId -> convertedInitializers.put(contextId,
-					(ApplicationContextInitializer<GenericApplicationContext>) applicationContextInitializers
-						.get(contextId)));
+				(ApplicationContextInitializer<GenericApplicationContext>) applicationContextInitializers
+					.get(contextId)));
 		return new FeignClientFactory(convertedInitializers);
 	}