pvary commented on code in PR #14810:
URL: https://github.com/apache/iceberg/pull/14810#discussion_r2661544342


##########
flink/v2.0/flink/src/main/java/org/apache/iceberg/flink/sink/dynamic/DynamicCommitter.java:
##########
@@ -126,9 +125,14 @@ public void 
commit(Collection<CommitRequest<DynamicCommittable>> commitRequests)
       return;
     }
 
-    // For every table and every checkpoint, we store the list of 
to-be-committed
-    // DynamicCommittable.
-    // There may be DynamicCommittable from previous checkpoints which have 
not been committed yet.
+    /*
+      Each (table, branch, checkpoint) triplet must have only one commit 
request.
+      There may be commit requests from previous checkpoints which have not 
been committed yet.
+
+      We currently keep a List of commit requests per checkpoint instead of a 
single CommitRequest<DynamicCommittable>
+      to process the Flink state from previous releases, which had multiple 
commit requests due to a bug in the upstream
+      DynamicWriteResultAggregator. We should replace this with a single 
commit request in the next major release.

Review Comment:
   Please help me refresh where we are related to this comment.
   
   A few things:
   - 1.10.1 is released, but (because of my questions) this PR did not make it 
there
   - 1.11.0 is the next planned release
   - If I understand correctly, since the Dynamic Sink is experimental, we can 
be a bit more lax with the state restore expectations
   
   @aiborodin, @mxm, @Guosmilesmile: What do you think about simplifying the 
code and forcing the users to upgrade `stop-with-savepoint` and restore with 
`allowNonRestoredState`, and documenting it in the release notes?



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