[GitHub] [helix] jiajunwang commented on a change in pull request #500: Ensure backward compatibility of the WAGED rebalancer.

[GitBox <gi...@apache.org>]

jiajunwang commented on a change in pull request #500: Ensure backward compatibility of the WAGED rebalancer.
URL: https://github.com/apache/helix/pull/500#discussion_r330725300
 
 

 ##########
 File path: helix-core/src/main/java/org/apache/helix/controller/rebalancer/waged/model/AssignableNode.java
 ##########
 @@ -290,36 +287,27 @@ private String computeFaultZone(ClusterConfig clusterConfig, InstanceConfig inst
       return zoneId == null ? instanceConfig.getInstanceName() : zoneId;
     } else {
       // Get the fault zone information from the complete topology definition.
-      String[] topologyDef = topologyStr.trim().split("/");
-      if (topologyDef.length == 0
-          || Arrays.stream(topologyDef).noneMatch(type -> type.equals(faultZoneType))) {
+      String[] topologyKeys = topologyStr.trim().split("/");
+      if (topologyKeys.length == 0 || Arrays.stream(topologyKeys)
+          .noneMatch(type -> type.equals(faultZoneType))) {
         throw new HelixException(
             "The configured topology definition is empty or does not contain the fault zone type.");
       }
 
       Map<String, String> domainAsMap = instanceConfig.getDomainAsMap();
-      if (domainAsMap == null) {
-        throw new HelixException(
-            String.format("The domain configuration of node %s is not configured", _instanceName));
-      } else {
-        StringBuilder faultZoneStringBuilder = new StringBuilder();
-        for (String key : topologyDef) {
-          if (!key.isEmpty()) {
-            if (domainAsMap.containsKey(key)) {
-              faultZoneStringBuilder.append(domainAsMap.get(key));
-              faultZoneStringBuilder.append('/');
-            } else {
-              throw new HelixException(String.format(
-                  "The domain configuration of node %s is not complete. Type %s is not found.",
-                  _instanceName, key));
-            }
-            if (key.equals(faultZoneType)) {
-              break;
-            }
+      StringBuilder faultZoneStringBuilder = new StringBuilder();
+      for (String key : topologyKeys) {
+        if (!key.isEmpty()) {
 
 Review comment:
   No for the input like this "/test/", the first item will be empty.

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