[erlang-questions] gen_server: {bad_return_value, {error, {91, invalid_string}}}

Attila Rajmund Nohl attila.r.nohl@REDACTED
Mon Aug 14 13:54:28 CEST 2017


Hello!

I'd check the code that handles the
{basic.cancel_ok,<<"amq.ctag-YRIyK1Kv0i93rkLbD9Zo8w">>} message,
because this was the last received message. Also my intuition is that
somewhere your code expects a list of strings, but gets a simple
string, and when it checks the first element, it finds 91 (probably
the '[' character) instead of a string.

2017-08-14 5:17 GMT+02:00 Khitai Pang <khitai.pang@REDACTED>:
> Hi list,
>
> On my CentOS7 server with esl-erlang-19.3.6-1.x86_64, a gen_server
> process mysteriously crashes.  See the error info below.  I can't figure
> out the reason of the error.  Any hint would be appreciated.
>
> {error_report,<0.25443.97>,
>      {<0.28918.97>,crash_report,
>       [[{initial_call,{xeef_analyzer,init,[Argument__1]}},
>         {pid,<0.28918.97>},
>         {registered_name,xeef_analyzer_009},
>         {error_info,
>             {exit,
>                 {bad_return_value,{error,{91,invalid_string}}},
> [{gen_server,terminate,7,[{file,"gen_server.erl"},{line,812}]},
>                  {proc_lib,init_p_do_apply,3,
>                      [{file,"proc_lib.erl"},{line,247}]}]}},
>         {ancestors,[xeef_analyzer_sup,xeef_sup,<0.25310.97>]},
> {messages,[{basic.cancel_ok,<<"amq.ctag-YRIyK1Kv0i93rkLbD9Zo8w">>}]},
>         {links,
> [#Port<0.2317500>,#Port<0.2317503>,<0.29009.97>,#Port<0.2317499>]},
>         {dictionary,
>             [{rand_seed,
>                  {#{max => 18446744073709551615,next =>
> #Fun<rand.4.41921595>,
>                     type => exs1024,uniform => #Fun<rand.5.41921595>,
>                     uniform_n => #Fun<rand.6.41921595>},
>                   {[5529181756040335035,6774320120208346895,
>                     4985297473998268992,12813505499546735856,
>                     3059599059795068553,3134963973831305956,
>                     5508046504858988103,3821329447243874404],
>                    [6547380368325771448,16036002885223559991,
>                     13982350927889545678,14401258729428095242,
>                     6347438184782916914,10561027033563628251,
>                     10847483533189471003,3486622809589930158]}}}]},
>         {trap_exit,true},
>         {status,running},
>         {heap_size,987},
>         {stack_size,27},
>         {reductions,139726}],
>        []]}}
>
>
> {error_report,<0.25443.97>,
>      {<0.29009.97>,supervisor_report,
>       [{supervisor,{local,xeef_analyzer_sup}},
>        {errorContext,child_terminated},
>        {reason,{bad_return_value,{error,{91,invalid_string}}}},
>        {offender,
>            [{pid,<0.28918.97>},
>             {id,xeef_analyzer},
>             {mfargs,
>                 {xeef_analyzer,start_link,
> [{sandbox,{<0.28962.97>,<<"sanbox_queue">>},none,true}]}},
>             {restart_type,permanent},
>             {shutdown,5000},
>             {child_type,worker}]}]}}
>
>
>
> Best wishes,
> Khitai
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