vigyasharma commented on code in PR #14837:
URL: https://github.com/apache/lucene/pull/14837#discussion_r2186901630


##########
lucene/core/src/java/org/apache/lucene/index/IndexWriter.java:
##########
@@ -3724,18 +3724,25 @@ private long prepareCommitInternal() throws IOException 
{
         maybeCloseOnTragicEvent();
       }
 
-      if (pointInTimeMerges != null) {
+      if (pointInTimeMerges != null && pointInTimeMerges.merges.size() > 0) {
         if (infoStream.isEnabled("IW")) {
           infoStream.message(
               "IW", "now run merges during commit: " + 
pointInTimeMerges.segString(directory));

Review Comment:
   There's a TODO to deprecate `segString(Directory dir)`, and indeed the 
directory is not used anywhere. We can simply use `toString()` instead. I just 
happened to find it as I wanted to make sure we log the number of submitted 
merges. We don't need to address it in this PR, in fact, it could be a good 
first issue.



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