sky76093016 commented on a change in pull request #2513:
URL: https://github.com/apache/ozone/pull/2513#discussion_r685876008



##########
File path: 
hadoop-hdds/config/src/main/java/org/apache/hadoop/hdds/conf/TimeDurationUtil.java
##########
@@ -50,6 +50,9 @@ public static long getTimeDurationHelper(String name, String 
vStr,
     if (null == vUnit) {
       LOG.warn("No unit for " + name + "(" + vStr + ") assuming " + unit);
       vUnit = ParsedTimeDuration.unitFor(unit);
+      if(null == vUnit){
+        throw new NullPointerException("Unexpected unit" + unit);

Review comment:
       Thanks @adoroszlai for reviewing this too.
   After query, `IllegalArgumentException` is indeed more suitable than 
`NullPointerException`.
   I will replace it immediately.




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