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<div> I think I figured it out. I tried it again from start; I believe I had started the app on the second node outside of the release (I.e., started the release binary with a clean target, and then manually started the app with application:start(app name)
), such that the kernel wasn't kicking in. I just repeated it from scratch, making sure I started the actual release target, and it appears to work fine.</div>
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<span style="font-weight:bold">From: </span><Phillips>, Chris Phillips <<a href="mailto:christopher.phillips@turner.com">christopher.phillips@turner.com</a>><br>
<span style="font-weight:bold">Date: </span>Wednesday, September 25, 2013 3:32 PM<br>
<span style="font-weight:bold">To: </span>Yogish Baliga <<a href="mailto:yogishb@yahoo.com">yogishb@yahoo.com</a>><br>
<span style="font-weight:bold">Cc: </span>"<a href="mailto:erlang-questions@erlang.org">erlang-questions@erlang.org</a>" <<a href="mailto:erlang-questions@erlang.org">erlang-questions@erlang.org</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [erlang-questions] Distributed apps when application terminates<br>
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<div> Yes, started but not loaded; I.e., running application:start(app name) again leads to an error, already started, but application:which_applications() does not list it. Same setup as I have when failover works by explicitly killing the initial node.</div>
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<span style="font-weight:bold">From: </span>Yogish Baliga <<a href="mailto:yogishb@yahoo.com">yogishb@yahoo.com</a>><br>
<span style="font-weight:bold">Date: </span>Wednesday, September 25, 2013 3:23 PM<br>
<span style="font-weight:bold">To: </span>Chris Phillips <<a href="mailto:christopher.phillips@turner.com">christopher.phillips@turner.com</a>><br>
<span style="font-weight:bold">Cc: </span>Yogish Baliga <<a href="mailto:yogishb@yahoo.com">yogishb@yahoo.com</a>>, "<a href="mailto:erlang-questions@erlang.org">erlang-questions@erlang.org</a>" <<a href="mailto:erlang-questions@erlang.org">erlang-questions@erlang.org</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [erlang-questions] Distributed apps when application terminates<br>
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<div>May be dumb question, but worth asking. <br>
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Is application started on the fail over node?<br>
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-- baliga<br>
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<div class="gmail_quote">On Wed, Sep 25, 2013 at 12:11 PM, Phillips, Christopher <span dir="ltr">
<<a href="mailto:Christopher.Phillips@turner.com" target="_blank">Christopher.Phillips@turner.com</a>></span> wrote:<br>
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<div> 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.</div>
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<span style="font-weight:bold">From: </span>Yogish Baliga <<a href="mailto:yogishb@yahoo.com" target="_blank">yogishb@yahoo.com</a>><br>
<span style="font-weight:bold">Date: </span>Wednesday, September 25, 2013 2:57 PM<br>
<span style="font-weight:bold">To: </span>Chris Phillips <<a href="mailto:christopher.phillips@turner.com" target="_blank">christopher.phillips@turner.com</a>><br>
<span style="font-weight:bold">Cc: </span>"<a href="mailto:erlang-questions@erlang.org" target="_blank">erlang-questions@erlang.org</a>" <<a href="mailto:erlang-questions@erlang.org" target="_blank">erlang-questions@erlang.org</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [erlang-questions] Distributed apps when application terminates<br>
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<div>According to distributed app documentation:<br>
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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
<span>distributed</span> configuration parameter, which is up and running. This is called a
<strong>failover</strong>.<br>
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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.<br>
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-- baliga<br>
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<div class="gmail_quote">On Wed, Sep 25, 2013 at 11:28 AM, Phillips, Christopher <span dir="ltr">
<<a href="mailto:Christopher.Phillips@turner.com" target="_blank">Christopher.Phillips@turner.com</a>></span> wrote:<br>
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<div>I have a release built around a distributed application. </div>
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<div>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.</div>
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<div>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.</div>
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