A Sebastian created HELIX-230:
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Summary: Message generation phase sends messages for partitions
that do not exist in a newly generated ideal state
Key: HELIX-230
URL: https://issues.apache.org/jira/browse/HELIX-230
Project: Apache Helix
Issue Type: Bug
Components: helix-core
Reporter: A Sebastian
The ResourceComputationStage uses the union of the partitions in the ideal
state and the current states in ZK to generate the resource map. It is this
resource map that is used in MessageGenerationPhase. This causes a couple of
issues:
# In the task framework, we need to generate an initial ideal state that
contains all the task partitions. If we don't add these, any ideal state set
for some partition by the task rebalancer are ignored and no messages are sent
out.
# When the task rebalancer generates a new ideal state that does not contain a
dropped task, the message generation phase may still send out transitions for
DROPPED->INITIAL_STATE.
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