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https://issues.apache.org/jira/browse/COUCHDB-1052?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12989570#comment-12989570
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Nicolas Maupu commented on COUCHDB-1052:
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What I mean by graceful restart is just to be sure CouchDB restart after a
erlang "heart attack" instead of stop
I suspect system clock to cause this erlang event because I don't have any NTP
server (and can't use it at the moment).
I added patch I use in attached files.
I changed HEART_COMMAND and start / stop functions. I also changed signal sent
to PID to stop (1 to 15) because on my system, this signal did not stop process
as expected.
> CouchDB crashes by Erlang Heartbeat Runtime System
> --------------------------------------------------
>
> Key: COUCHDB-1052
> URL: https://issues.apache.org/jira/browse/COUCHDB-1052
> Project: CouchDB
> Issue Type: Improvement
> Components: Infrastructure
> Affects Versions: 0.10.1, 1.0.1
> Environment: Solaris 10
> Reporter: Nicolas Maupu
> Attachments: couchdb-bin-1.0.1.diff
>
> Original Estimate: 2h
> Remaining Estimate: 2h
>
> Hello,
> We have several couchdb in our production environment (starting from 0.10.1
> and upgraded to 1.0.1). Some instances began to crash several times a day.
> After research (I am not aware of all erlang tips and tricks), I found that
> the problem was caused by erlang heartbeat runtime system
> (http://www.erlang.org/doc/man/heart.html).
> For some reasons (it seems to be a problem with system clock), this heartbeat
> process sends a signal to main erlang process to trigger HEARTBEAT_COMMAND.
> The command configured by couchdb startup script is to call 'bin/couchdb -k'
> which kill server ...
> I don't know if this is wanted or not but is Erlang heartbeat system provided
> to restart a service if this one crash ?
> I patched mine to restart process gracefully but I would like to know if this
> is a feature or a bug : next time I upgrade, I will have to patch again.
> My patch is a little bit specific to my architecture so I did not provide it.
> Ask me if you are interested.
> nm.
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