loserwang1024 commented on code in PR #3988:
URL: https://github.com/apache/flink-cdc/pull/3988#discussion_r2055650071


##########
flink-cdc-connect/flink-cdc-source-connectors/flink-cdc-base/src/main/java/org/apache/flink/cdc/connectors/base/source/enumerator/IncrementalSourceEnumerator.java:
##########
@@ -172,7 +181,7 @@ public void handleSourceEvent(int subtaskId, SourceEvent 
sourceEvent) {
             LOG.info(
                     "The enumerator receives notice from subtask {} for the 
stream split assignment. ",
                     subtaskId);
-            this.streamSplitTaskId = subtaskId;

Review Comment:
   1. Use set rather than list?   2. What if the stream split's taskId changed 
because addSplitBack or something else? I remember @ruanhang use to mention it 
when I intruduce newly added framework. 



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