[jira] [Created] (HELIX-254) Helix controller should disable participants with mismatched session-id

["Zhen Zhang (JIRA)" <ji...@apache.org>]

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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