Apache9 commented on code in PR #23593:
URL: https://github.com/apache/flink/pull/23593#discussion_r1375399529


##########
flink-connectors/flink-connector-base/src/main/java/org/apache/flink/connector/base/source/hybrid/HybridSourceSplitEnumerator.java:
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@@ -304,6 +304,7 @@ public Object getPreviousEnumerator() {
         LOG.info("Starting enumerator for sourceIndex={}", currentSourceIndex);
         context.setIsProcessingBacklog(currentSourceIndex < sources.size() - 
1);
         currentEnumerator.start();
+        finishedReaders.clear();

Review Comment:
   I guess you mean line 261?
   
   
https://github.com/apache/flink/blob/c1be70bbc60e4271d9ff80ac4eaf3421d7602058/flink-connectors/flink-connector-base/src/main/java/org/apache/flink/connector/base/source/hybrid/HybridSourceSplitEnumerator.java#L261
   
   Line 251 is for closing the HybridEnumerator itself, so whether to cleanup 
the finishedReaders is not critial, as we will not use this hybrid enumerator 
any more.



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