Hunter L created HELIX-770:
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Summary: HELIX: Fix a possible NPE in loadBalance in
IntermediateStateCalcStage
Key: HELIX-770
URL: https://issues.apache.org/jira/browse/HELIX-770
Project: Apache Helix
Issue Type: Improvement
Reporter: Hunter L
Assignee: Hunter L
In isLoadBalanceDownwardForAllReplicas() in IntermediateStateCalcStage,
statePriorityMap was throwing a NPE because the partition contained a replica
in ERROR state, and the map did not have an entry for it. To amend the issue,
Venice added the ERROR state in the state model with a priority, and Helix
added checks to prevent NPEs. Changelist: 1. Add containsKey checks in
isLoadBalanceDownwardForAllReplicas() 2. Make the Controller correctly log all
partitions with ERROR state replicas 3. Add HelixDefinedStates in
statePriorityList if not already added
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