[COUCHDB-3102] The xxx_config_listener doesn't restart after a failure - ASF JIRA

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Details

Type: Bug
Status: Closed
Priority: Major
Resolution: Won't Fix
Affects Version/s: None
Fix Version/s: None
Component/s: None
Labels:
None

Description

The config_listener_mon monitors the caller.
However in lots of places we use following pattern

handle_config_terminate(_Server, _Reason, State) ->
    spawn(fun() ->
        timer:sleep(5000),
        config:listen_for_changes(?MODULE, State)
    end).

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).
When this happen any further configuration changes get unnoticed by processes.