xyuanlu opened a new issue #1042:
URL: https://github.com/apache/helix/issues/1042
Helix does not check if an instance's topology config is defined correctly
when the instance is added or joins cluster. This will cause Helix to fail the
rebalance. We could add the sanity check when
1. Instance is added to the cluster,
2. Instance joins cluster,
3. User update InstanceConfig.
4. Controller prepares the topology structure for rebalance <--
Currently we only check here
Since we already have sanity check logic in
controller/rebalancer/topology/Topology.java and
controller/rebalancer/waged/model/AssignableNode.java, it's better to extract
the logic into an util function first and use the same logic to do sanity check
in multiple places.
Reference:
https://cwiki.apache.org/confluence/display/HELIX/Helix+Topology-aware+Rebalance+Strategy#HelixTopology-awareRebalanceStrategy-TopologyInformation
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