virajjasani commented on code in PR #5456:
URL: https://github.com/apache/hadoop/pull/5456#discussion_r1132889680


##########
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/GenericsUtil.java:
##########
@@ -103,14 +113,15 @@ public static boolean isLog4jLogger(Class<?> clazz) {
    * @return true if the logger uses Log4J implementation.
    */
   public static boolean isLog4jLogger(String logger) {
-    if (logger == null) {
+    if (logger == null || !IS_LOG4J_LOGGER.get()) {
       return false;
     }
     Logger log = LoggerFactory.getLogger(logger);
     try {

Review Comment:
   Refactored to keep the logic in only one utility method. The other method 
will just call this one. Simplified (exactly as slf4j library methods).



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