[erlang-questions] Stopping a supervisor running under a supervisor

[Siri Hansen]

Hi Chris,

what does you childspec for my_sup (i.e. the childspec specified in
my_supersup) look like - or really, is the Shutdown element set to
brutal_kill? If supervisor:terminate_child/2 causes the processes to be
killed, that is probably the case. The recommendation is that Shutdown is
set to infinity if the child is a supervisor, which will give it unlimited
time to gracefully shut down all it's children and then itself.

Regards
/siri

2015-01-06 16:31 GMT+01:00 Chris Clark <boozelclark@REDACTED>:

> Hi Sean
>
> supervisor:terminate_child/2 does work however it causes errors in my logs
> so i am looking for a way to gracefully terminate the children.
>
> Thanks
>
> On Tue, Jan 6, 2015 at 4:20 PM, Sean Cribbs <sean@REDACTED> wrote:
>
>> Did you try supervisor:terminate_child/2?
>>
>> On Mon, Jan 5, 2015 at 11:44 PM, Chris Clark <boozelclark@REDACTED>
>> wrote:
>>
>>> Hi Antonio
>>>
>>> Thanks for the assistance. From what I have read  a supervisor should
>>> stop if it is sent a shutdown signal using exit(Pid, shutdown). but it
>>> will only accept that signal from its parent process in an OTP application.
>>> I tried creating a function in the parent supervisor(my_supersup)
>>> stop_child(Pid) that then sends the exit(pid, shutdown) signal and then
>>> call that from the shell but that doesn't seem to stop it either.
>>>
>>> Thanks,
>>>
>>> On Tue, Dec 30, 2014 at 11:47 PM, Antonio Dias <antonio.r.dias@REDACTED
>>> > wrote:
>>>
>>>> Hi, i'm fairly new to Erlang also, but can't you send a 'stop' message
>>>> and use that to stop the process?
>>>>
>>>> ADias
>>>>
>>>> On Thu, Dec 11, 2014 at 10:40 AM, Chris Clark <boozelclark@REDACTED>
>>>> wrote:
>>>>
>>>>> Hi
>>>>>
>>>>> I am fairly new to erlang and have a question regarding properly
>>>>> stopping a supervisor that resides directly under another supervisor.
>>>>>
>>>>> My application consist of a top level supervisor (my_supersup) which
>>>>> is a simple_one_for_one supervisor of other supervisors my_sup. Each my_sup
>>>>> supervises a gen_server, serv and another supervisor that is also a
>>>>> simple_one_for_one supervisor of some workers
>>>>>
>>>>> my_supersup
>>>>> (simple_one_for_one, transient)
>>>>> |
>>>>> |_______ ...
>>>>> |
>>>>> my_sup (one_for_all, transient)
>>>>> |________________
>>>>> |                            |
>>>>> |                           serv
>>>>> worker_sup
>>>>> (simple_one_for_one, transient)
>>>>> |___________ ...
>>>>> |              |
>>>>> w1          w2
>>>>>
>>>>> How do shutdown an instance of my_sup gracefully without killing it.
>>>>> At present I can do it with supervisor:terminate_child and
>>>>> supervisor:delete_child but I would like them to shutdown rather than be
>>>>> killed if possible?
>>>>>
>>>>> Thanks in advance.
>>>>>
>>>>> _______________________________________________
>>>>> erlang-questions mailing list
>>>>> erlang-questions@REDACTED
>>>>> http://erlang.org/mailman/listinfo/erlang-questions
>>>>>
>>>>>
>>>>
>>>
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>>>
>>
>>
>> --
>> Sean Cribbs <sean@REDACTED>
>> Sr. Software Engineer
>> Basho Technologies, Inc.
>> http://basho.com/
>>
>
>
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