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  1. Couchbase Server
  2. MB-46363

Memcached should handle revEpoch in CCCP payloads

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    • 1
    • KV-Engine Sprint 2021 July

    Description

      As described in the linked document, revEpoch is being added to CCCP payloads so that clients prefer the surviving side of the cluster after a quorum failover. Seems like we should do the following in Memcached:

      • add a new call to allow ns_server to set the revEpoch (or change existing call)
      • Memcached should remember the combination {revEpoch, rev} instead of just rev when it records which CCCP payload is sent to which client.

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          is duplicated by

          Bug - A problem which impairs or prevents the functions of the product. MB-47527 [Upgrade] Swap rebalance failed when add 7.0.1-5945 node to 6.0.2 cluster

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

          Bug - A problem which impairs or prevents the functions of the product. MB-45669 Terse bucket info revision must take quorum failovers into account.

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

          Improvement - An improvement or enhancement to an existing feature or task. JDCP-197 Parse bucket config "epochRev"

          • Major - Major loss of function.
          • Resolved
          links to

          Web Link Terse Bucket Info Revisions and Quorum Failover

          mentioned in

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              hareen.kancharla Hareen Kancharla
              dfinlay Dave Finlay
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              Dates

                Created:
                Updated:
                Resolved:

                PagerDuty