mimaison commented on code in PR #23316:
URL: https://github.com/apache/kafka/pull/23316#discussion_r3903196461


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storage/src/main/java/org/apache/kafka/storage/internals/log/AbstractIndex.java:
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@@ -294,8 +288,9 @@ public int sizeInBytes() {
     }
 
     public void close() throws IOException {
-        flush(); // Ensure the index content is flushed to disk as 
LogSegment.close may append an entry
-        trimToValidSize(true);
+        flush(false); // Ensure the index content is flushed to disk as 
LogSegment.close may append an entry

Review Comment:
   Yes that's the reason I kept the two `flush()` calls. I did not want risking 
changing the behavior, and potentially breaking other things. It seems flushing 
an already flushed file is relatively cheap.
   
   If both of you agree a single `flush(true)` after `trimToValidSize()` is 
fine, I'm happy to make the change.



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