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  1. JGroups
  2. JGRP-1002

Merge: make the coordinator remain the same if possible after a merge

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    • Feature Request
    • Status: Resolved (View Workflow)
    • Major
    • Resolution: Duplicate
    • None
    • 3.2
    • None

    Description

      When we have

      {C, A, B}

      and split into

      {C,A}

      and

      {B}

      , then a merge will produce

      {A,B,C}

      . Therefore the coord is moved from C to A. For certain apps, e.g. JBoss singletons, this is not good, as we're moving the singleton services from a perfectly healthy node to a different node.
      GOAL: come up with a deterministic policy of picking a coord such that we minimize coord switching if the existing coord is still member of the cluster.
      This depends on or is related to the flexible coord pick policy JIRA issue

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                Updated:
                Resolved: