Lei Xia created HELIX-633:
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Summary: AutoRebalancer should ignore disabled instance and all
partitions on disabled instances should be dropped in FULL_AUTO rebalance mode.
Key: HELIX-633
URL: https://issues.apache.org/jira/browse/HELIX-633
Project: Apache Helix
Issue Type: Bug
Reporter: Lei Xia
Assignee: Lei Xia
Now, if a node is disabled in cluster but stays to appear in LIVEINSTANCES.
Helix AutoRebalancer still assign partitions on the disabled node, but not
sending state transition messages to the node. So all partitions which belonged
to that node disappeared from EV.
The right behavior is that AutoRebalancer should ignore the
disabled node or the node should disappear from live instances.
After this fix, in Helix Full-Auto rebalance mode, if an instance is disabled
from its config, no matter it is live or not, the partitions on the disabled
node will be transferred to DROPPED state, and the partitions will be
redistributed to all other live and enabled instances.
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