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  1. Couchbase Server
  2. MB-34329

vbucket_seqno last_persisted_snap_start > last_persisted_seqno in hard failover case

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    Description

      Build: 5.5.4 build 4340

      Scenario:

      1. Create 4node cluster
      2. Create "default" couchbase bucket
      3. Load initial data 1K
      4. Perform failover of node-2 using `stop couchbase server`
      5. Perform update operation on 1K of docs again
      6. Validate vbucket_seqno on each node

      Observation:

      Few vbuckets in node-3 has last_persisted_snap_start > last_persisted_seqno.

       vb_356:abs_high_seqno:             0
      		 
       vb_356:high_seqno:                 0
      		 
       vb_356:last_persisted_seqno:       0
      		 
       vb_356:last_persisted_snap_end:    1
      		 
       vb_356:last_persisted_snap_start:  1
      		 
       vb_356:purge_seqno:                0

      Test case used:

      From testrunner:
      		 
      failover.failovertests.FailoverTests.test_failover_stop_server,replicas=1,graceful=False,num_failed_nodes=1,load_ratio=10,flusher_batch_split_trigger=3,GROUP=P1

      Attachments

        For Gerrit Dashboard: MB-34329
        # Subject Branch Project Status CR V
        109983,2 MB-34329: reset snapshot range to be a valid range vulcan kv_engine Status: MERGED +2 +1
        110106,1 Merge couchbase/vulcan into couchbase/alice alice kv_engine Status: MERGED +2 +1
        110143,2 Merge couchbase/alice into couchbase/master master kv_engine Status: MERGED +2 +1
        110577,2 Revert "Pin kv_engine manifest for 6.0.2" master manifest Status: MERGED +2 +1

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            ashwin.govindarajulu Ashwin Govindarajulu
            ashwin.govindarajulu Ashwin Govindarajulu
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            Dates

              Created:
              Updated:
              Resolved:

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