AHeise commented on a change in pull request #17351:
URL: https://github.com/apache/flink/pull/17351#discussion_r716388837



##########
File path: 
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/operators/sink/NoopCommitterHandler.java
##########
@@ -34,7 +34,8 @@
 
     @Override
     public List<Object> processCommittables(
-            SupplierWithException<List<Object>, Exception> 
committableSupplier) {
+            SupplierWithException<List<Object>, Exception> 
committableSupplier) throws Exception {
+        committableSupplier.get();

Review comment:
       If we always want to `preCommit`, then please refactor such that 
`preCommit` is called on call-site (e.g. remove the `Supplier` and directly 
pass the result.

##########
File path: 
flink-streaming-java/src/main/java/org/apache/flink/streaming/runtime/operators/sink/NoopCommitterHandler.java
##########
@@ -34,7 +34,8 @@
 
     @Override
     public List<Object> processCommittables(
-            SupplierWithException<List<Object>, Exception> 
committableSupplier) {
+            SupplierWithException<List<Object>, Exception> 
committableSupplier) throws Exception {
+        committableSupplier.get();

Review comment:
       Why is this needed, what's not working in this way? It feels 
counter-intuitive to have `preCommit` without `commit`. It seems like I missed 
a case when I explicitly structured the code to not call `preCommit`.




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