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  1. MariaDB Server
  2. MDEV-7143

mysql load --local-infile sends unknown 4-byte packet

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Critical
    • Resolution: Not a Bug
    • Affects Version/s: 5.5.33a
    • Fix Version/s: 5.5.41
    • Component/s: OTHER
    • Labels:
      None
    • Environment:
      64-bit linux

      Description

      I see extra bytes in what mysql client sends to server when load data local infile .. is called. The extra bytes appears to be an additional packet which I don't recognize to any known packet. It consists of 4 bytes and includes 0x0 0x0 0x0 0x3 .

      ngrep dump caught by exexcuting :

      sudo ngrep -x -q -d lo '' > outfile.out

      dump:

      interface: lo (127.0.0.0/255.0.0.0)
       
      T 127.0.0.1:58151 -> 127.0.0.1:3000 [AP]
        38 00 00 00 03 6c 6f 61    64 20 64 61 74 61 20 6c    8....load data l
        6f 63 61 6c 20 69 6e 66    69 6c 65 20 27 2e 2f 6c    ocal infile './l
        6f 61 64 33 2e 74 78 74    27 20 69 6e 74 6f 20 74    oad3.txt' into t
        61 62 6c 65 20 74 65 73    74 2e 74 31                able test.t1
       
      T 127.0.0.1:3000 -> 127.0.0.1:58151 [AP]
        0c 00 00 01 fb 2e 2f 6c    6f 61 64 33 2e 74 78 74    ....../load3.txt
       
      T 127.0.0.1:58151 -> 127.0.0.1:3000 [AP]
        14 00 00 02 31 20 20 20    20 20 20 32 20 0a 31 20    ....1      2 .1
        20 20 20 20 20 39 31 0a    00 00 00 03                     91.....
       
      ............. The packet above should contain 4 (header) + 20 bytes but it has 28 bytes. 
       
      T 127.0.0.1:3000 -> 127.0.0.1:58151 [AP]
        19 00 00 04 ff ff ff 01    02 02 00 00 00 0f 45 6e    ..............En
        64 20 62 75 6c 6b 20 69    6e 73 65 72 74             d bulk insert

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            Assignee:
            nirbhay_c Nirbhay Choubey (Inactive)
            Reporter:
            vilho Vilho Raatikka
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              Dates

              Created:
              Updated:
              Resolved: