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

[Khitai Pang]

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