zhangmeng916 commented on a change in pull request #876: Add construction of 
domain in Helix participant logic
URL: https://github.com/apache/helix/pull/876#discussion_r389925050
 
 

 ##########
 File path: 
helix-core/src/main/java/org/apache/helix/cloud/azure/AzureCloudInstanceInformationProcessor.java
 ##########
 @@ -142,8 +142,16 @@ public AzureCloudInstanceInformation 
parseCloudInstanceInformation(List<String>
         String vmName = computeNode.path(INSTANCE_NAME).getTextValue();
         String platformFaultDomain = computeNode.path(DOMAIN).getTextValue();
         String vmssName = computeNode.path(INSTANCE_SET_NAME).getValueAsText();
+        String azureTopology = AzureConstants.AZURE_TOPOLOGY;
+        String[] parts = azureTopology.trim().split("/");
+        if (parts.length != 2) {
+          throw new HelixException("Invalid Azure topology definition: " + 
azureTopology);
+        }
 
 Review comment:
   I was thinking whether it's possible the file was accidentally changed. 

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