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  1. Couchbase Server
  2. MB-52439

Eph: Rebalance failed with reason "vbmap_error main.generatePrevVbmapParams"

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Details

    • Bug
    • Resolution: Fixed
    • Critical
    • 7.1.1
    • 7.1.1
    • ns_server
    • Enterprise Edition 7.1.1 build 3113

    Description

      Build: 7.1.1-3113

      Scenario:

      • Two node cluster, Eph bucket with replica=1
      • Load 500K docs as initial load
      • Kill memcached on node (172.23.105.155), auto-reprovision was successful
      • Initiate rebalance

      Observation:

      Rebalance failed with the following error

       

      Rebalance exited with reason {vbmap_error,
      		 
      <<"panic: runtime error: index out of range [1] with length 1\n\ngoroutine 1 [running]:\nmain.generatePrevVbmapParams({0xc0001f8000?, 0x400, 0x555})\n\tvbmap/greedy.go:738 +0x47e\nmain.generateVbmapGreedy({0xc000110240, 0x2, 0x1, 0x400, 0x1}, {0xc000198000, 0x400, 0x42a})\n\tvbmap/greedy.go:853 +0xa8\nmain.main()\n\tvbmap/main.go:436 +0x10c5\n">>}.
      		 
      Rebalance Operation Id = 5c35609048ab2dd30637844bdbde6a9c

       

      Note: Last working build 7.1.1-3070

       

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. MB-50712 Don't reduce the number of replicas when computing vbmaps with # replicas >= # server-groups

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          For Gerrit Dashboard: MB-52439
          # Subject Branch Project Status CR V
          175779,3 MB-52439: Remove unsafe nodes from replica chains neo ns_server Status: ABANDONED 0 0
          175853,2 MB-52439: Correct 'MaxNodeId' calculation for PrevVbmap neo vbmap Status: MERGED +2 +1
          176041,1 Merge remote-tracking branch 'couchbase/neo' master vbmap Status: ABANDONED 0 0
          176042,1 Merge remote-tracking branch 'couchbase/neo' master vbmap 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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