vdiravka commented on a change in pull request #1462: DRILL-3853: Upgrade to 
SqlLine 1.5.0
URL: https://github.com/apache/drill/pull/1462#discussion_r216409026
 
 

 ##########
 File path: 
exec/java-exec/src/main/java/org/apache/drill/exec/server/Drillbit.java
 ##########
 @@ -70,6 +71,9 @@
      */
     GuavaPatcher.patch();
     Environment.logEnv("Drillbit environment: ", logger);
+    // Jersey uses java.util.logging - create bridge: jul to slf4j
+    SLF4JBridgeHandler.removeHandlersForRootLogger();
 
 Review comment:
   Is it for logging info from libs, which `use java.util.logging`? Is the 
default level suitable for Drill? How the log file is changed?
   
   Does it makes sense to change the log level for it in some cases, possibly 
via logback.xml?

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