chia7712 commented on code in PR #20222:
URL: https://github.com/apache/kafka/pull/20222#discussion_r2243317510


##########
tools/src/main/java/org/apache/kafka/tools/ConnectPluginPath.java:
##########
@@ -323,8 +322,7 @@ private static Set<Row> 
enumerateRows(ManifestWorkspace.SourceWorkspace<?> works
             rowAliases.add(PluginUtils.prunedName(pluginDesc));
             rows.add(newRow(workspace, pluginDesc.className(), new 
ArrayList<>(rowAliases), pluginDesc.type(), pluginDesc.version(), true));
             // If a corresponding manifest exists, mark it as loadable by 
removing it from the map.
-            // TODO: The use of Collections here shall be fixed with 
KAFKA-19524.
-            nonLoadableManifests.getOrDefault(pluginDesc.className(), 
Collections.emptySet()).remove(pluginDesc.type());
+            nonLoadableManifests.getOrDefault(pluginDesc.className(), new 
HashSet<>()).remove(pluginDesc.type());

Review Comment:
   Perhaps we could avoid creating useless hash set. for example:
   ```java
               var types = nonLoadableManifests.get(pluginDesc.className());
               if (types != null) types.remove(pluginDesc.type());
   ```



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