HoustonPutman commented on a change in pull request #1861:
URL: https://github.com/apache/lucene-solr/pull/1861#discussion_r489447516



##########
File path: 
solr/core/src/java/org/apache/solr/handler/admin/ConfigSetsHandler.java
##########
@@ -170,21 +176,90 @@ private void handleConfigUploadRequest(SolrQueryRequest 
req, SolrQueryResponse r
 
     // Create a node for the configuration in zookeeper
     boolean trusted = getTrusted(req);
-    zkClient.makePath(configPathInZk, ("{\"trusted\": " + 
Boolean.toString(trusted) + "}").
-        getBytes(StandardCharsets.UTF_8), true);
+    Set<String> filesToDelete = Collections.emptySet();
+    if (overwritesExisting) {
+      if (!trusted) {
+        ensureOverwritingUntrustedConfigSet(zkClient, configPathInZk);
+      }
+      if (req.getParams().getBool(ConfigSetParams.CLEANUP, false)) {
+        filesToDelete = getAllConfigsetFiles(zkClient, configPathInZk);
+      }
+    } else {
+      zkClient.makePath(configPathInZk, ("{\"trusted\": " + 
Boolean.toString(trusted) + "}").
+              getBytes(StandardCharsets.UTF_8), true);
+    }
 
     ZipInputStream zis = new ZipInputStream(inputStream, 
StandardCharsets.UTF_8);
     ZipEntry zipEntry = null;
     while ((zipEntry = zis.getNextEntry()) != null) {
       String filePathInZk = configPathInZk + "/" + zipEntry.getName();
+      if (filePathInZk.endsWith("/")) {
+        filesToDelete.remove(filePathInZk.substring(0, filePathInZk.length() 
-1));
+      } else {
+        filesToDelete.remove(filePathInZk);
+      }
       if (zipEntry.isDirectory()) {
-        zkClient.makePath(filePathInZk, true);
+        zkClient.makePath(filePathInZk, false,  true);

Review comment:
       Not very likely, was just thinking about possibilities. It's probably 
not an issue 99.9% of times, so it likely doesn't need to be addressed.




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