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  1. Couchbase Server
  2. MB-60476

ThrowExceptionUnderflowPolicy current:270108 arg:279424 for DCP_BUFFER_ACKNOWLEDGEMENT

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Details

    • Untriaged
    • Linux x86_64
    • 0
    • Yes

    Description

      Build: 7.6.0-2032

      Steps:

      • 2 node cluster

        +---------------+--------+-----------+----------+-------------------------+-------------------+
        | Nodes         | CPU    | Mem_total | Mem_free | Swap_mem_used           | Active / Replica  |
        +---------------+--------+-----------+----------+-------------------------+-------------------+
        | 172.23.217.74 | 61.025 | 3.80 GiB  | 2.43 GiB | 1.00 MiB / 976.00 MiB   | 105000 / 105000   |
        | 172.23.217.73 | 60.625 | 3.80 GiB  | 2.08 GiB | 133.04 MiB / 976.00 MiB | 105000 / 105000   |
        +---------------+--------+-----------+----------+-------------------------+-------------------+
         

      • Bucket status

        +---------+-------------------+----------+--------+-------------------------+
        | Bucket  | Type / Storage    | Replicas | Items  | RAM Quota / Used        |
        +---------+-------------------+----------+--------+-------------------------+
        | default | couchbase / magma | 2        | 210000 | 512.00 MiB / 298.10 MiB |
        +---------+-------------------+----------+--------+-------------------------+
        

      • Rebalance-In 2 nodes (172.23.108.36 & 172.23.217.248)

      Observation:

      From memcached.log of "172.23.217.73"

       

      ERROR 193: Exception occurred during packet execution.
      Closing connection [ {"ip":"172.23.217.74","port":55540} - {"ip":"172.23.217.73","port":11206} (System, @ns_server) ]:
        ThrowExceptionUnderflowPolicy current:270108 arg:279424.
      Cookies: [{"aiostat":"success","ewouldblock":false,"packet":{"bodylen":4,"cas":0,"datatype":"raw","extlen":4,"extras":{"buffer_bytes":279424},"keylen":0,"magic":"ClientRequest","opaque":627,"opcode":"DCP_BUFFER_ACKNOWLEDGEMENT","vbucket":0},"refcount":1,"started":"4612621023688670 (5119 us ago)","throttled":false}]
      Exception thrown from: [
       "#0  /opt/couchbase/bin/memcached() [0x400000+0x1443b9]",
       "#1  /opt/couchbase/bin/memcached() [0x400000+0x4b5ee7]",
       "#2  /opt/couchbase/bin/memcached() [0x400000+0x4b684d]",
       "#3  /opt/couchbase/bin/memcached() [0x400000+0x4b6a35]",
       "#4  /opt/couchbase/bin/memcached() [0x400000+0x4b6d25]",
       "#5  /opt/couchbase/bin/memcached() [0x400000+0x343584]",
       "#6  /opt/couchbase/bin/memcached() [0x400000+0x1d333d]",
       "#7  /opt/couchbase/bin/memcached() [0x400000+0x2a6e30]",
       "#8  /opt/couchbase/bin/memcached() [0x400000+0x22243b]",
       "#9  /opt/couchbase/bin/memcached() [0x400000+0x208b98]",
       "#10 /opt/couchbase/bin/memcached() [0x400000+0x20d9f5]",
       "#11 /opt/couchbase/bin/memcached() [0x400000+0x217f27]",
       "#12 /opt/couchbase/bin/../lib/libevent_core-2.1.so.7() [0x7feecbe64000+0xf84e]",
       "#13 /opt/couchbase/bin/../lib/libevent_core-2.1.so.7() [0x7feecbe64000+0x18b99]",
       "#14 /opt/couchbase/bin/../lib/libevent_core-2.1.so.7(event_base_loop+0x357) [0x7feecbe64000+0x19287]",
       "#15 /opt/couchbase/bin/memcached() [0x400000+0x981a96]",
       "#16 /opt/couchbase/bin/memcached() [0x400000+0x981f9e]",
       "#17 /opt/couchbase/bin/memcached() [0x400000+0x984468]",
       "#18 /opt/couchbase/bin/memcached() [0x400000+0x231a29]",
       "#19 /opt/couchbase/bin/memcached() [0x400000+0x8d156c]",
       "#20 /opt/couchbase/bin/../lib/libstdc++.so.6() [0x7feecb0af000+0xe4aa3]",
       "#21 /lib/x86_64-linux-gnu/libpthread.so.0() [0x7feecb80c000+0x7ea7]",
       "#22 /lib/x86_64-linux-gnu/libc.so.6(clone+0x3f) [0x7feecad70000+0xfba2f]"]

      TAF test:

      rebalance_new.rebalance_in.RebalanceInTests:
        test_rebalance_in_with_ops_sync_async,nodes_init=2,nodes_in=2,replicas=2,num_items=10000,process_concurrency=2,sdk_timeout=60,num_items=100000,durability=MAJORITY,active_resident_threshold=70
      

       

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              ashwin.govindarajulu Ashwin Govindarajulu
              ashwin.govindarajulu Ashwin Govindarajulu
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                Created:
                Updated:
                Resolved:

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