FYI: this is the function that is crashing:
get_uint32_measurement(Request, #internal{os_type = {unix, linux}}) ->
{ok,F} = file:open("/proc/loadavg",[read,raw]), %% <---
crash line
{ok,D} = file:read(F,24),
ok = file:close(F),
{ok,[Load1,Load5,Load15,_PRun,PTotal],_} = io_lib:fread("~f ~f ~f ~d/~d",
D),
case Request of
?avg1 -> sunify(Load1);
?avg5 -> sunify(Load5);
?avg15 -> sunify(Load15);
?ping -> 4711;
?nprocs -> PTotal
end;
Is there something unique about that open?
Matthew
> On Jan 26, 2017, at 10:37 AM, Luke Bakken <[email protected]> wrote:
>
> Steven,
>
> You may be able to get information via the lsof command as to what
> process(es) are using many file handles (if that is the cause).
>
> I searched for that particular error and found this GH issue:
> https://github.com/emqtt/emqttd/issues/426
>
> Which directed me to this page:
> https://github.com/emqtt/emqttd/wiki/linux-kernel-tuning
>
> Basho also has a set of recommended tuning parameters:
> http://docs.basho.com/riak/kv/2.2.0/using/performance/
>
> Do you have other error entries in any of Riak's logs at around the
> same time as these messages? Particularly crash.log.
>
> --
> Luke Bakken
> Engineer
> [email protected]
>
> On Thu, Jan 26, 2017 at 4:42 AM, Steven Joseph <[email protected]> wrote:
>> Hi Shaun,
>>
>> I have already set this to a very high value
>>
>> ([email protected])1> os:cmd("ulimit -n").
>> "20000500\n"
>> ([email protected])2>
>>
>>
>> So the issue is not that the limit is low, but maybe a resource leak ? As I
>> mentioned our application processes continuously run queries on the cluster.
>>
>> Kind Regards
>>
>> Steven
>
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