[GitHub] [helix] pkuwm commented on a change in pull request #344: Changing IllegalStateException to Helix Exception for CRUSH based rebalance strategy algorithm.

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pkuwm commented on a change in pull request #344: Changing IllegalStateException to Helix Exception for CRUSH based rebalance strategy algorithm.
URL: https://github.com/apache/helix/pull/344#discussion_r305587778
 
 

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 File path: helix-core/src/main/java/org/apache/helix/controller/rebalancer/strategy/CrushRebalanceStrategy.java
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 @@ -89,7 +89,16 @@ public ZNRecord computePartitionAssignment(final List<String> allNodes,
       long data = partitionName.hashCode();
 
       // apply the placement rules
-      List<Node> selected = select(topNode, data, _replicas, eventId);
+      List<Node> selected;
+      try {
+        selected = select(topNode, data, _replicas, eventId);
+      } catch (IllegalStateException e) {
+        String errorMessage = String
+            .format("Could not select enough number of nodes. %s partition %s, required %d",
+                _resourceName, partitionName, _replicas);
+        LogUtil.logError(Log, eventId, errorMessage);
 
 Review comment:
   Seems the same in https://github.com/apache/helix/pull/346#discussion_r305574275

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