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  1. Couchbase Server
  2. MB-62841

Allow Search service greater control in picking rebalance orchestrator.

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Details

    • Improvement
    • Resolution: Fixed
    • Critical
    • 7.6.4
    • 7.6.2
    • fts
    • 0

    Description

      This ticket is setup to explore how FTS can exert greater control to pick a rebalance orchestrator.  Currently, we do not favour any node over the other(among the nodes that will remain in the cluster after the rebalance).

       

      This can lead to a number of issues such as incorrect partition count such as when a neo node was picked as orchestrator when upgrading from Neo -> Trinity.  As we make fixes to the planner/rebalance codepaths, we should ensure that those fixes are picked up during the upgrade process of the first node being upgraded, especially when upgrading from say, 6.6.x(no longer supported and therefore will not have fixes for bugs discovered later) to 7.6.x(quite a few improvement in the planner/rebalance paths).

       

      GSI does something similar, which can be used as a reference - https://issues.couchbase.com/browse/MB-56700.

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        Issue Links

          blocks

          Bug - A problem which impairs or prevents the functions of the product. MB-62805 Aborted rebalance leads to increased partition count and uneven distribution

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          relates to

          Improvement - An improvement or enhancement to an existing feature or task. MB-56700 Allow higher version nodes to be chosen as rebalance master during minor release upgrade

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MB-63049 Extra partitions after upgrade from 7.2.5 to 7.6.3

          • Critical - Crashes, loss of data, severe memory leak.
          • In Progress
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                Updated:
                Resolved:

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