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  1. Couchbase Server
  2. MB-43317

Acknowledging too many bytes in DCP connection.

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Details

    • Bug
    • Resolution: Duplicate
    • Major
    • None
    • Cheshire-Cat
    • analytics
    • None
    • Untriaged
    • 1
    • Unknown

    Description

      Looking at the logs from MB-43230 we can see that cbas is providing the wrong number of bytes in the DCP ack causing KV to underflow.

      e.g. on node 172.23.96.48 we are seeing

      2020-12-10T15:12:49.913356-08:00 WARNING (WAREHOUSE) DCP (Producer) eq_dcpq:cbas:Default.Local:WAREHOUSE:9cfc48ea9d162fa22f381d1fc53903f8:11 - Attempting to release 26272 bytes which is greater than bytesOutstanding:26269
      		 
      2020-12-10T15:12:49.913483-08:00 WARNING 558: exception occurred in runloop during packet execution. Closing connection: ThrowExceptionUnderflowPolicy current:26269 arg:26272. Cookies: [{"aiostat":"success","connection":"[ {\"ip\":\"172.23.120.75\",\"port\":48828} - {\"ip\":\"172.23.96.48\",\"port\":11210} (<ud>@cbas</ud>) ]","engine_storage":"0x0000000000000000","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}]

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        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. MB-42506 [System Test] Mismatch between DCP buffer acks for Analytics DCP consumer

          • Major - Major loss of function.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. MB-43230 [System Test] : Seeing exceptions in eventing logs - LCB_ERR_AUTHENTICATION_FAILURE - around the time when query service was OOM killed

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
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              till Till Westmann
              owend Daniel Owen
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              Dates

                Created:
                Updated:
                Resolved:

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                  PagerDuty