[erlang-questions] "detached VM" vs "VM under screen"

dmitry kolesnikov <>
Mon Jan 9 17:12:08 CET 2012


Reproduced on FC14 32bit. Erlang R15B (built manually) but same was on EC2

Send by <*)-|-|-<

On 9.1.2012, at 17.47, Zabrane Mickael <> wrote:

> Interesting. Which OS are you using (Linux, OSX...) ? 32 or 64 bits arch ?
>
> Regards,
> Zabrane
>
>
> On Jan 9, 2012, at 4:37 PM, dmitry kolesnikov wrote:
>
>> Now I have discovered the issue. When you start erl with -smp enable
>> then heart do not restart killed run_erl.
>>
>> Send by <*)-|-|-<
>>
>> On 6.1.2012, at 22.20, Garrett Smith <> wrote:
>>
>>> On Fri, Jan 6, 2012 at 12:58 PM, dmitry kolesnikov
>>> <> wrote:
>>>> Hello,
>>>> Recently I meet issue with run_erl and heart. Heart monitors only beam
>>>> process, if run_erl dies then to_erl cannot access console. I am
>>>> planning to rollback into remote shell approach.
>>>
>>> This is not true. You may be seeing something environment specific or
>>> have a configuration issue.
>>>
>>> FWIW, I've used run_erl in a large variety of production settings and
>>> would strongly recommend it.
>>>
>>> Here's what I see on Linux R14B04:
>>>
>>> $ mkdir /tmp/test
>>> $ pgrep beam && pgrep run_erl # confirm no running Erlang procs
>>> $ HEART_COMMAND="run_erl -daemon /tmp/test/ /tmp/test/ 'erl -heart'"
>>> run_erl -daemon /tmp/test/ /tmp/test/ "erl -heart"
>>> $ pgrep beam && pgrep run_erl
>>> 8618
>>> 8616
>>> $ echo "1 + 1." | to_erl /tmp/test/
>>> Attaching to /tmp/test/erlang.pipe.3 (^D to exit)
>>>
>>> [EOF]
>>> $ tail -n3 /tmp/test/erlang.log.1
>>> 1> 1 + 1.
>>> 2
>>> $ pkill run_erl
>>> $ pgrep beam && pgrep run_erl
>>> 8703
>>> 8701
>>> $ echo "2 + 2." | to_erl /tmp/test/
>>> Attaching to /tmp/test/erlang.pipe.4 (^D to exit)
>>>
>>> [EOF]
>>> $ tail -n3 /tmp/test/erlang.log.1
>>> 1> 2 + 2.
>>> 4
>>> $ pkill beam
>>> $ pgrep beam && pgrep run_erl
>>> 8753
>>> 8751
>>> $ echo "4 + 4." | to_erl /tmp/test/
>>> Attaching to /tmp/test/erlang.pipe.5 (^D to exit)
>>>
>>> [EOF]
>>> $ tail -n3 /tmp/test/erlang.log.1
>>> 1> 4 + 4.
>>> 8
>>> $ pkill heart
>>> $ pgrep beam && pgrep run_erl
>



More information about the erlang-questions mailing list