Changgeng Li created HELIX-602:
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Summary: prevResourceAssignment is always null when
HelixRebalancer.computeResourceMapping is called
Key: HELIX-602
URL: https://issues.apache.org/jira/browse/HELIX-602
Project: Apache Helix
Issue Type: Bug
Components: helix-core
Affects Versions: 0.7.1, 0.7.2
Reporter: Changgeng Li
Discussed about this with [~k4j] and he agrees it's a bug that should be fixed.
https://github.com/apache/helix/blob/acd902e2433f65e9864ccf49fcd1a04c36b1f206/helix-core/src/main/java/org/apache/helix/controller/stages/BestPossibleStateCalcStage.java#L222
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