1996fanrui commented on code in PR #24042:
URL: https://github.com/apache/flink/pull/24042#discussion_r1453038598


##########
flink-yarn/src/main/java/org/apache/flink/yarn/YarnClusterDescriptor.java:
##########
@@ -216,6 +229,24 @@ public YarnClusterDescriptor(
         this.nodeLabel = 
flinkConfiguration.getString(YarnConfigOptions.NODE_LABEL);
     }
 
+    /** Adapt flink env setting. */
+    private static <T> void adaptEnvSetting(
+            Configuration config,
+            ConfigOption<T> configOption,
+            String envKey,
+            Function<T, Boolean> validator) {

Review Comment:
   As I understand, this `validator` wanna check whether the value of 
`configOption` in config is legal. 
   
   - If it's legal, we can add the env
   - If it's illegal, we will ignore.
   
   Is my understanding right?
   
   If right, I don't think we should do this check here. I means we should 
cover Flink on Kubernetes if we wanna check whether it's legal. So check them 
in the yarn side doesn't make sense to me.



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