ethqunzhong commented on a change in pull request #14200:
URL: https://github.com/apache/pulsar/pull/14200#discussion_r806540190



##########
File path: conf/log4j2.yaml
##########
@@ -134,7 +134,6 @@ Configuration:
       additivity: true
       AppenderRef:
         - ref: "${sys:pulsar.log.appender}"
-          level: "${sys:pulsar.log.level}"

Review comment:
       as default `pulsar.log.level=info`
   i have do a test in product env as follow:
   <img width="1022" alt="image" 
src="https://user-images.githubusercontent.com/16517186/154014948-2d2547f2-7f1b-4943-a0e2-a8096d6abd1a.png";>
   
   remove this item seems do not change default log4j behavior.
   
   as answer in 
[[stackoverflow:programmatically-change-log-level-in-log4j2](https://stackoverflow.com/questions/23434252/programmatically-change-log-level-in-log4j2)
 :
   
   i have try all mentioned way to change logger level by programmatically way, 
it not work unless remove `level: "${sys:pulsar.log.level}"`
   
   Have you ever had similar problems?
   




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