CODEWITHSUNDEEP
erlangmonitor
Raphael Laurent
Raphael Laurent

Reputation: 1951

Erlang demonitor badarg

Here is my function :

mydemonitor(Pid) ->
    io:format("Demonitor : ~w ~n", [Pid]),  %%For debugging and trying to see what's wrong
    erlang:demonitor(Pid, [flush]).

And here is what I get :

Demonitor : <0.41.0>

=ERROR REPORT==== 15-Oct-2014::15:32:19 ===
Error in process <0.47.0> with exit value: {badarg,[{erlang,demonitor,[<0.41.0>,[flush]],[]},{node3,mydemonitor,1,[{file,"node3.erl"},{line,213}]},{node3,stabilize,4,[{file,"node3.erl"},{line,147}]},{node3,node,5,[{file,"node3.erl"},{line,46}]}]}

I looked at the man of erlang:demonitor/2 and erlang:demonitor/1, it seems that I use the right syntax. I tried to use demonitor/1 (so without the flush option) without success.

I really don't see what is wrong, any idea would be greatly appreciated :D

Upvotes: 0

Views: 215

Answers (1)

legoscia
legoscia

Reputation: 41648

The argument to demonitor/1 and demonitor/2 is not the PID of the process being monitored, but the reference returned by monitor/2.

Upvotes: 4

Related Questions