dasahcc commented on a change in pull request #346: Unwanted logs have been 
removed.
URL: https://github.com/apache/helix/pull/346#discussion_r305574112
 
 

 ##########
 File path: 
helix-core/src/main/java/org/apache/helix/controller/stages/BestPossibleStateCalcStage.java
 ##########
 @@ -241,38 +241,28 @@ private boolean 
computeResourceBestPossibleState(ClusterEvent event, ResourceCon
       try {
         HelixManager manager = 
event.getAttribute(AttributeName.helixmanager.name());
         rebalancer.init(manager);
-        idealState =
-            rebalancer.computeNewIdealState(resourceName, idealState, 
currentStateOutput, cache);
+        idealState = rebalancer.computeNewIdealState(resourceName, idealState, 
currentStateOutput, cache);
 
         output.setPreferenceLists(resourceName, 
idealState.getPreferenceLists());
 
         // Use the internal MappingCalculator interface to compute the final 
assignment
         // The next release will support rebalancers that compute the mapping 
from start to finish
-        partitionStateAssignment = mappingCalculator
-            .computeBestPossiblePartitionState(cache, idealState, resource, 
currentStateOutput);
+        partitionStateAssignment =
+            mappingCalculator.computeBestPossiblePartitionState(cache, 
idealState, resource, currentStateOutput);
         for (Partition partition : resource.getPartitions()) {
           Map<String, String> newStateMap = 
partitionStateAssignment.getReplicaMap(partition);
           output.setState(resourceName, partition, newStateMap);
         }
 
         // Check if calculation is done successfully
         return checkBestPossibleStateCalculation(idealState);
+      } catch (HelixException e){
+        // No eligible instance is found.
+        LogUtil
+            .logError(logger, _eventId, e.getMessage());
       } catch (Exception e) {
         LogUtil
             .logError(logger, _eventId, "Error computing assignment for 
resource " + resourceName + ". Skipping.", e);
-        // TODO : remove this part after debugging NPE
-        StringBuilder sb = new StringBuilder();
 
 Review comment:
   Yes. They can be removed since the NPE happened by assignment is NULL. If we 
check that part, we should fine with the logs.
   
   But you have too many commits. I would suggest to merge some of them into to 
commits: CRUSHED log fixing and removing the todo log. Put them into two 
separated PRs.

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