tillrohrmann commented on a change in pull request #11320: 
[FLINK-16437][runtime] Make SlotManager allocate resource from ResourceManager 
at the worker granularity.
URL: https://github.com/apache/flink/pull/11320#discussion_r401738574
 
 

 ##########
 File path: 
flink-runtime/src/main/java/org/apache/flink/runtime/resourcemanager/slotmanager/SlotManagerImpl.java
 ##########
 @@ -125,20 +126,29 @@
         * */
        private boolean failUnfulfillableRequest = true;
 
+       /**
+        * The default resource spec of workers to request. It could be null 
iff on standalone/local setups, in which cases
+        * the {@link SlotManagerImpl} will never request any new worker.
+        */
+       @Nullable
+       private final WorkerResourceSpec defaultWorkerResourceSpec;
 
 Review comment:
   A nice side-effect would be that everywhere where we now pass `null` we 
would have a nice and descriptive name `WorkerResourceSpec.UNSPECIFIED` or 
`WorkerResourceSpec.getUnknownSpec()`.

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