Log warning in case of standard Commons Logging discovery

Closes gh-30575

Author: jhoeller

spring-jcl/src/main/java/org/apache/commons/logging/LogFactoryService.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2018 the original author or authors.
+ * Copyright 2002-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -36,6 +36,12 @@ public class LogFactoryService extends LogFactory {
 	private final Map<String, Object> attributes = new ConcurrentHashMap<>();
 
 
+	public LogFactoryService() {
+		System.out.println("Standard Commons Logging discovery in action with spring-jcl: " +
+				"please remove commons-logging.jar from classpath in order to avoid potential conflicts");
+	}
+
+
 	@Override
 	public Log getInstance(Class<?> clazz) {
 		return getInstance(clazz.getName());