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From "Nicolas Maupu (JIRA)" <>
Subject [jira] Created: (COUCHDB-1052) CouchDB crashes by Erlang Heartbeat Runtime System
Date Tue, 01 Feb 2011 17:16:29 GMT
CouchDB crashes by Erlang Heartbeat Runtime System

                 Key: COUCHDB-1052
             Project: CouchDB
          Issue Type: Improvement
          Components: Infrastructure
    Affects Versions: 1.0.1, 0.10.1
         Environment: Solaris 10
            Reporter: Nicolas Maupu


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 (
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.


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