cmccabe commented on code in PR #19545:
URL: https://github.com/apache/kafka/pull/19545#discussion_r2057607502


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metadata/src/main/java/org/apache/kafka/metadata/bootstrap/BootstrapMetadata.java:
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@@ -117,7 +117,7 @@ public List<ApiMessageAndVersion> records() {
     }
 
     public MetadataVersion metadataVersion() {
-        return metadataVersion;
+        return MetadataVersion.fromFeatureLevel(metadataVersionLevel);

Review Comment:
   In a data loss scenario with `kraft.version=1` we would need to re-format 
the directory and re-add the voter, so there would be no more 
`bootstrap.metadata` file.
   
   (If you delete some files in the raft log directory but not others, bad 
things may happen, of course, but that is no different than today; it breaks 
the Raft invariants.)



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