youzipi commented on code in PR #17172:
URL: https://github.com/apache/pulsar/pull/17172#discussion_r952113910


##########
pulsar-broker/src/main/java/org/apache/pulsar/PulsarBrokerStarter.java:
##########
@@ -240,8 +240,8 @@ && isBlank(starterArguments.bookieConfigFile)) {
 
             // init bookie server
             if (starterArguments.runBookie) {
-                checkNotNull(bookieConfig, "No ServerConfiguration for 
Bookie");
-                checkNotNull(bookieStatsProvider, "No Stats Provider for 
Bookie");
+                Objects.requireNonNull(bookieConfig, "No ServerConfiguration 
for Bookie");

Review Comment:
   guava `chekNotNull` and jdk `Objects.requireNonNull` provide the same simple 
semantic:
   ```java
   if (obj == null)
       throw new NullPointerException(message);
   return obj;
   ```
   @hangc0276 



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