starting slave with relative path or non existant slave.config-file does not error out

[Joe Daly]

Starting up the slave server with a relative path --slave.config-file=slave.config does not work, and the error message is:

Replication slave: drizzle_state_addrinfo:getaddrinfo:Name or service not known

We should add a check or maybe the options parsing is supposed to do this? The error message also needs to be understandable.

[David Shrewsbury (dshrews)]

Not sure about the relative path stuff. I followed the example set by other plugins and set the default to be in SYSCONFDIR. A full path might be necessary. Maybe Monty can speak more to this?

As far as the error message, yes, that definitely needs cleaned up.

[David Shrewsbury (dshrews)]

It seems that the working directory for a plugin (i.e., the relative path) is $datadir/var/local. So without a full path for the slave configuration file, it will look for the file here.

I've updated the docs to clarify this, and also added code to verify that the config file is opened successfully and if not, report a better error message.