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  1. Couchbase Server
  2. MB-36360

[System Test] DCP_BUFFER_ACKNOWLEDGEMENT: ThrowExceptionUnderflowPolicy

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      Build : 6.5.0-4471
      Test : -test tests/2i/test_idx_rebalance_replica_mad_hatter.yml -scope tests/2i/scope_idx_rebalance_replica_12nodes.yml
      Scale : 2

      On node 172.23.96.48, the following type of errors are seen:

      [ns_server:info,2019-10-05T05:33:17.593-07:00,babysitter_of_ns_1@cb.local:<0.14007.9>:ns_port_server:log:224]memcached<0.14007.9>: 2019-10-05T05:33:17.386049-07:00 ERROR 159: exception occurred in runloop during packet execution. Cookie info: [{"aiostat":"success","connection":"[ 127.0.0.1:55748 - 127.0.0.1:11209 (<ud>@ns_server</ud>) ]","engine_storage":"0x00007efb77167b10","ewouldblock":false,"packet":{"bodylen":4,"cas":0,"datatype":"raw","extlen":4,"key":"<ud></ud>","keylen":0,"magic":"ClientRequest","opaque":0,"opcode":"DCP_BUFFER_ACKNOWLEDGEMENT","vbucket":0},"refcount":1}] - closing connection ([ 127.0.0.1:55748 - 127.0.0.1:11209 (<ud>@ns_server</ud>) ]): ThrowExceptionUnderflowPolicy current:0 arg:3328

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            girish.benakappa Girish Benakappa
            girish.benakappa Girish Benakappa
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