node-mongodb-native/test/spec/server-discovery-and-monitoring/rs/disaggregated_storage_setversion.yml at 47e6cb1ab679836c41d8536eb1da9730397bc152 · mongodb/node-mongodb-native · GitHub

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# Disaggregated storage clusters use a constant setVersion (typically 1) instead of
# incrementing it on each reconfig. This test validates that primary staleness detection
# works correctly using electionId when setVersion doesn't change.
description: Static setVersion (DSC) is compatible with both pre and post DRIVERS-2412
uri: "mongodb://a/?replicaSet=rs"
phases:
  # Phase 1: Initial state - A is primary with electionId=5, setVersion=1
  - responses:
      -
        - "a:27017"
        - ok: 1
          helloOk: true
          isWritablePrimary: true
          hosts:
            - "a:27017"
            - "b:27017"
          setName: rs
          setVersion: 1
          electionId: {"$oid": "000000000000000000000005"}
          minWireVersion: 0
          maxWireVersion: 17
      -
        - "b:27017"
        - ok: 1
          helloOk: true
          isWritablePrimary: false
          secondary: true
          hosts:
            - "a:27017"
            - "b:27017"
          setName: rs
          setVersion: 1
          minWireVersion: 0
          maxWireVersion: 17
    outcome:
      servers:
        a:27017:
          type: RSPrimary
          setName: rs
          setVersion: 1
          electionId: {"$oid": "000000000000000000000005"}
        b:27017:
          type: RSSecondary
          setName: rs
          setVersion: 1
          electionId: null
      topologyType: ReplicaSetWithPrimary
      logicalSessionTimeoutMinutes: null
      setName: rs
      maxSetVersion: 1
      maxElectionId: {"$oid": "000000000000000000000005"}
  # Phase 2: B becomes primary with newer electionId=6, but setVersion stays at 1
  # The driver should accept B as the new primary and mark A as Unknown
  - responses:
      -
        - "b:27017"
        - ok: 1
          helloOk: true
          isWritablePrimary: true
          hosts:
            - "a:27017"
            - "b:27017"
          setName: rs
          setVersion: 1
          electionId: {"$oid": "000000000000000000000006"}
          minWireVersion: 0
          maxWireVersion: 17
    outcome:
      servers:
        a:27017:
          type: Unknown
          setName: null
          setVersion: null
          electionId: null
        b:27017:
          type: RSPrimary
          setName: rs
          setVersion: 1
          electionId: {"$oid": "000000000000000000000006"}
      topologyType: ReplicaSetWithPrimary
      logicalSessionTimeoutMinutes: null
      setName: rs
      maxSetVersion: 1
      maxElectionId: {"$oid": "000000000000000000000006"}
  # Phase 3: Old primary A tries to come back with stale electionId=5
  # Even though setVersion is still 1 (unchanged), the driver should reject A
  # because its electionId is older than the current maxElectionId=6
  - responses:
      -
        - "a:27017"
        - ok: 1
          helloOk: true
          isWritablePrimary: true
          hosts:
            - "a:27017"
            - "b:27017"
          setName: rs
          setVersion: 1
          electionId: {"$oid": "000000000000000000000005"}
          minWireVersion: 0
          maxWireVersion: 17
    outcome:
      servers:
        a:27017:
          type: Unknown
          setName: null
          setVersion: null
          electionId: null
        b:27017:
          type: RSPrimary
          setName: rs
          setVersion: 1
          electionId: {"$oid": "000000000000000000000006"}
      topologyType: ReplicaSetWithPrimary
      logicalSessionTimeoutMinutes: null
      setName: rs
      maxSetVersion: 1
      maxElectionId: {"$oid": "000000000000000000000006"}