dsmiley commented on a change in pull request #135:
URL: https://github.com/apache/solr/pull/135#discussion_r641221511



##########
File path: 
solr/core/src/java/org/apache/solr/core/FileSystemConfigSetService.java
##########
@@ -62,7 +62,12 @@ public String configSetName(CoreDescriptor cd) {
   @Override
   public boolean checkConfigExists(String configName) throws IOException {
     Path configSetDirectory = configSetBase.resolve(configName);
-    return Files.isDirectory(configSetDirectory);
+    if (Files.isDirectory(configSetDirectory)) {

Review comment:
       Why the isDirectory check; why not just check for solrconfig.xml?

##########
File path: solr/core/src/java/org/apache/solr/cloud/ZkConfigSetService.java
##########
@@ -151,6 +151,19 @@ public boolean checkConfigExists(String configName) throws 
IOException {
     }
   }
 
+  @Override
+  public boolean checkConfigExistsWithSolrConfigXml(String configName) throws 
IOException {
+    try {
+      Boolean existsConfig = zkClient.exists(CONFIGS_ZKNODE + "/" + 
configName, true);
+      if (existsConfig == null || existsConfig.booleanValue() == false) return 
false;
+      Boolean existsSolrConfigXml = zkClient.exists(CONFIGS_ZKNODE + "/" + 
configName + "/solrconfig.xml", true);
+      return existsSolrConfigXml;

Review comment:
       I'm missing something; why two calls to ZK just to check that a config 
exists?  If solrconfig.xml is now necessary, then why check the parent?




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