Details

    • Type: Bug Bug
    • Status: Open
    • Priority: Major Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None

      Description

      via dev@ by Peta Bogdan <bog495@gmail.com>

      Hello,

      I have a small database around 120 MB with approximately 16,000 documents.

      However, it happens (also from futon) that I get this error:

      [Tue, 17 Jan 2012 07:22:01 GMT] [error] [<0.185.0>] {error_report,<0.30.0>,
      {<0.185.0>,crash_report,
      [[{initial_call,{couch_file,init,['Argument__1']}},

      {pid,<0.185.0>}

      ,

      {registered_name,[]},
      {error_info,
      {exit,
      {{badmatch,
      {ok,
      9_MEGABYTES_BINARY}},
      [{couch_file,read_raw_iolist_int,3},
      {couch_file,maybe_read_more_iolist,4},
      {couch_file,handle_call,3},
      {gen_server,handle_msg,5},
      {proc_lib,init_p_do_apply,3}]},
      [{gen_server,terminate,6},
      {proc_lib,init_p_do_apply,3}]}},
      {ancestors,[<0.184.0>]},
      {messages,
      [{'$gen_call',
      {<0.10840.18>,#Ref<0.0.3.20907>},
      bytes}]},
      {links,[<0.190.0>]},
      {dictionary,[]},
      {trap_exit,true},
      {status,running},
      {heap_size,1597},
      {stack_size,24},
      {reductions,65666}],
      [{neighbour,
      [{pid,<0.190.0>},
      {registered_name,[]}

      ,
      {initial_call,
      {couch_ref_counter,init,['Argument__1']}},
      {current_function,{gen_server,loop,6}},

      {ancestors,[<0.188.0>,<0.187.0>,<0.184.0>]}

      ,

      {messages,[]}

      ,

      {links,[<0.185.0>]}

      ,

      {dictionary,[]}

      ,

      {trap_exit,false}

      ,

      {status,waiting}

      ,

      {heap_size,610}

      ,

      {stack_size,9}

      ,

      {reductions,362}

      ]}]]}}

      If this error occurs to frequently causes couch_server to reach its max
      restart frequency causing the entire supervision tree to shutdown and hence
      the database server instance disappears.

      The function couch_file:read_raw_iolist_int/3 calls file:pread which
      returns

      {ok, Binary}

      . This Binary has almost 9 megabytes in size, which is
      very strange.
      I think this does mean that the function file:pread/3 is instructed to read
      from wrong position.

      The only reason I can think of is that the value of 'TotalBytes' from line
      (1) doesn't match the value of 'TotalBytes' from line (2)

      (1) TotalBytes = calculate_total_read_len(BlockOffset, Len),
      (2)

      {ok, <<RawBin:TotalBytes/binary>>}

      = file:pread(Fd, Pos, TotalBytes),

      The possible answer would be that in certain conditions the function
      calculate_total_read_len/2 doesn't return the expected value.

      Server: CouchDB/1.1.1 (Erlang OTP/R14B04)
      OS: OpenBSD 5.0 GENERIC.MP#63 amd64

      Now, the trouble is how to circumvent this situation.

      Thank you in advance,

      Bogdan

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          • Assignee:
            Unassigned
            Reporter:
            Jan Lehnardt
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            Dates

            • Created:
              Updated:

              Development