[jira] [Created] (COUCHDB-3102) The xxx_config_listener doesn't restart after a failure

["ILYA (JIRA)" <ji...@apache.org>]

ILYA created COUCHDB-3102:
-----------------------------

             Summary: The xxx_config_listener doesn't restart after a failure
                 Key: COUCHDB-3102
                 URL: https://issues.apache.org/jira/browse/COUCHDB-3102
             Project: CouchDB
          Issue Type: Bug
            Reporter: ILYA


The [config_listener_mon|https://github.com/apache/couchdb-config/blob/master/src/config_listener_mon.erl#L44] monitors the caller. 
However in lots of places we use [following pattern|https://github.com/apache/couchdb-chttpd/blob/master/src/chttpd_config_listener.erl#L45:L49]
{code}
handle_config_terminate(_Server, _Reason, State) ->
    spawn(fun() ->
        timer:sleep(5000),
        config:listen_for_changes(?MODULE, State)
    end).
{code}
In this case the spawned fun exits right after the monitor has been established.
Which means config_listener_mon would terminate. Effectively removing event handler from config_event process (gen_event event manager).



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