[erlang-questions] Distributed apps when application terminates

Yogish Baliga <>
Wed Sep 25 21:23:22 CEST 2013


May be dumb question, but worth asking.

Is application started on the fail over node?

-- baliga


On Wed, Sep 25, 2013 at 12:11 PM, Phillips, Christopher <
> wrote:

>    The node appears to have gone down; if I'm attached to it I get
> dropped back to the shell. If I check for running Erlang processes (ps aux
> | grep beam) I see nothing. The other node received a 'nodedown' message.
> That's what's confusing me; if it was still up I'd understand, and in the
> past when just stopping the application manually I accepted it not failing
> over. This is a bit different.
>
>   From: Yogish Baliga <>
> Date: Wednesday, September 25, 2013 2:57 PM
> To: Chris Phillips <>
> Cc: "" <>
> Subject: Re: [erlang-questions] Distributed apps when application
> terminates
>
>    According to distributed app documentation:
>
> If the node where the application is running goes down, the application is
> restarted (after the specified timeout) at the first node, specified by the
> distributed configuration parameter, which is up and running. This is
> called a *failover*.
>
>  In your case, your node did not go down but supervisor is stopped. I did
> a test in the past of the application fail over by disabling ethernet
> adapater on the master node.
>
>  -- baliga
>
>
>
> On Wed, Sep 25, 2013 at 11:28 AM, Phillips, Christopher <
> > wrote:
>
>>  I have a release built around a distributed application.
>>
>>  If I spin two nodes up, things are configured properly such that if I
>> attach and q() out of the node the application is actively running on,
>> failover occurs, the application starts up on the other node.
>>
>>  What I'm finding is that in the same situation, if I kill the top level
>> supervisor (either by directly sending it an exit message, or having a
>> child fail enough times to pass the max restart threshold), I _don't_ fail
>> over. I do, however, receive a node down message on the other node. I'm
>> wondering if this is intentional, a bug, or if I'm doing something wrong.
>>
>> _______________________________________________
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>> 
>> http://erlang.org/mailman/listinfo/erlang-questions
>>
>>
>
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