[all] Supervisor received unexpected message appeared in error log on startup

[mocchira]

Since ets:give_away (http://erlang.org/doc/man/ets.html#give_away-3) invoked at https://github.com/leo-project/leo_backend_db/pull/15/files send the message {'ETS-TRANSFER',Tab,FromPid,GiftData} to the new owner and now supervisor handles those messages as unexpected messages in a way implemented at https://github.com/erlang/otp/blob/OTP-19.3.6.5/lib/stdlib/src/supervisor.erl#L630-L633, the error line always appeared on startup of every component.

[mocchira]

I tried to fix this by ignoring this particular message at https://github.com/leo-project/leo_logger/blob/1.3.4/src/leo_logger_error_logger_h.erl#L66-L86 but no luck (doesn't reach into this closure however should be passed according to the spec (http://erlang.org/doc/man/error_logger.html)). WIP

[mocchira]

Another possible solution is to change the owner to some other well known (at least leo_backend_db_sup knows) permanent process which is not supervisor however there seems to be no such processes.

[mocchira]

leo-project/leo_backend_db#17 will fix this issue.