Zhen Zhang created HELIX-254:
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Summary: Helix controller should disable participants with
mismatched session-id
Key: HELIX-254
URL: https://issues.apache.org/jira/browse/HELIX-254
Project: Apache Helix
Issue Type: Bug
Reporter: Zhen Zhang
Assignee: Zhen Zhang
Participants may have a mismatched session-id in live-instance (session-id
filed in live-instance znode is different from the ephemeral owner id in
live-instance znode's meta data). this causes problems when controller sending
transition messages to participant and participant just removes the messages
due to mismatched session-id. this will lead to infinite loop and flood zk
server.
While we have a ticket for fixing the mismatched session-id issue, it will be
also safe to have a check on helix controller for liveinstance changes. if a
liveinstance with mismatched session-id is detected, helix controller should
disable the participant.
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