[erlang-questions] Problem with io monitor - a bug?
Álvaro
avalormaquedano@REDACTED
Fri Nov 30 13:57:18 CET 2012
Dear all,
Every time I run this simple code, my program gets stuck:
> Pid = spawn (moduleName,myread,["hello"]).
where:
myread(Prompt)->
try
Result = io:read(Prompt),
io:format("Res: ~p~n",[Result]),
catch
A:B->
io:format("Read error: ~p:~p~n",[A,B]),
false
end.
if I check the status of the process:
> erlang:process_info(Pid).
[{current_function,{io,wait_io_mon_reply,2}},
{initial_call,{default_environment,myread,1}},
{status,waiting},
{message_queue_len,0},
{messages,[]},
{links,[]},
{dictionary,[]},
{trap_exit,false},
{error_handler,error_handler},
{priority,normal},
{group_leader,<0.25.0>},
{total_heap_size,233},
{heap_size,233},
{stack_size,7},
{reductions,28},
{garbage_collection,[{min_bin_vheap_size,46368},
{min_heap_size,233},
{fullsweep_after,65535},
{minor_gcs,0}]},
{suspending,[]}]
It seems to be stuck in the function io:wait_io_mon_reply/2 (surfing
through io.erl I found that this function waits for a response from the
process managing the io ). This process is not answering, hence my code
stops working.
I've checked that the "group_leader()" once I spawn the reading process is
the same used by my shell.
Any ideas on how to deal with it?
Regards,
Álvaro
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