zjffdu commented on a change in pull request #4121:
URL: https://github.com/apache/zeppelin/pull/4121#discussion_r634876091



##########
File path: 
zeppelin-server/src/main/java/org/apache/zeppelin/service/NoAuthenticationService.java
##########
@@ -30,7 +30,7 @@
 import org.slf4j.LoggerFactory;
 
 public class NoAuthenticationService implements AuthenticationService {
-  private static Logger logger = 
LoggerFactory.getLogger(NoAuthenticationService.class);
+  private static final Logger logger = 
LoggerFactory.getLogger(NoAuthenticationService.class);

Review comment:
       Rename it to be `LOGGER`, this is our convention for static final 
variables. 

##########
File path: 
zeppelin-server/src/main/java/org/apache/zeppelin/service/NoAuthenticationService.java
##########
@@ -30,7 +30,7 @@
 import org.slf4j.LoggerFactory;
 
 public class NoAuthenticationService implements AuthenticationService {
-  private static Logger logger = 
LoggerFactory.getLogger(NoAuthenticationService.class);
+  private static final Logger logger = 
LoggerFactory.getLogger(NoAuthenticationService.class);

Review comment:
       Rename it to be `LOGGER`, this is our naming convention for static final 
variables. 




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