[erlang-questions] Yaws process died when executing read_file

Martin Dimitrov <>
Wed Oct 19 15:38:03 CEST 2011


On 10/19/2011 3:45 PM, Steve Vinoski wrote:
> On Wed, Oct 19, 2011 at 6:46 AM, Martin Dimitrov <> wrote:
>> I do performance testing of our Erlang application with OpenSTA. The
>> test runs with 300 virtual users. At some point the following errors
>> start popping up:
>>
>> Yaws process died: {{badmatch,{error,eacces}},
>>                [{yaws_server,ut_read,1},
>>                 {yaws_server,deliver_dyn_file,5},
>>                 {yaws_server,aloop,3},
>>                 {yaws_server,acceptor0,2},
>>                 {proc_lib,init_p_do_apply,3}]}
>>
>> The call file:read_file(UT#urltype.fullpath) crashes in function
>> ut_read(UT). I recompiled the module and printed the context. The error
>> is eacces and UT holds:
>>
>> {urltype,yaws,
>>                          {file_info,14088,regular,read_write,
>>                              {{2011,9,13},{11,51,42}},
>>                              {{2011,10,17},{17,59,44}},
>>                              {{2011,3,16},{13,18,58}},
>>                              33206,1,3,0,0,0,0},
>>                          "/handler.yaws",
>>                          "c:/Temp/harmony/script/../www/handler.yaws",
>>                          "/",undefined,undefined,"text/html",
>>                          "/handler.yaws",undefined}
>>
>> The file handler.yaws is the entry point of our app and is called on
>> every request. When I run the test with 100 or less virtual users I
>> don't see these errors. So how can it be "Missing permission for reading
>> the file, or for searching one of the parent directories" as the error
>> is described in the file:read_file documentation?
> Please let us know:
>
> * what operating system and version you're using
> * what version of Erlang you're using
> * what version of Yaws you're using
>
> --steve

Sorry I didn't include this info:
- Operating system: Windows 7
- Erlang version: R14B04
- Yaws version: 1.91



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