TisonKun commented on a change in pull request #10251: 
[FLINK-14851][FLINK-14850] Implement Executors and wire them to the 
ContextEnvironment
URL: https://github.com/apache/flink/pull/10251#discussion_r347902048
 
 

 ##########
 File path: 
flink-yarn/src/main/java/org/apache/flink/yarn/cli/FlinkYarnSessionCli.java
 ##########
 @@ -416,7 +416,9 @@ private void applyDescriptorOptionToConfig(final 
CommandLine commandLine, final
                }
 
                final String dynamicPropertiesEncoded = 
encodeDynamicProperties(commandLine);
-               
configuration.setString(YarnConfigOptionsInternal.DYNAMIC_PROPERTIES, 
dynamicPropertiesEncoded);
+               if (dynamicPropertiesEncoded != null && 
!dynamicPropertiesEncoded.isEmpty()) {
 
 Review comment:
   Is it a relevant diff(i.e., cause tests fail) or just improving on the fly? 
I'm ok with on the fly improvement but to be clear.

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