Without more of the log its hard to say, but I think you're probably seeing this reported as those configs are passed from the root config -> client configs -> serializers. There were some issues in the way we were tracking if config values had been used or not and Connect in particular was susceptible to this issue. It's been fixed in https://issues.apache.org/jira/browse/KAFKA-KAFKA-3711 on trunk.
-Ewen On Sun, Jun 12, 2016 at 9:45 PM, Barry Kaplan <bkap...@memelet.com> wrote: > In connect-distributed.properties I have values like: > > session.timeout.ms=120000 > > > But at startup I get warnings like: > > The configuration session.timeout.ms = 120000 was supplied but isn't a > > known config. > > > I'm getting these warnings for most settings (eg, internal.key.converter, > key.converter, but I really don't understand from the docs if most of the > configs are really needed). > -- Thanks, Ewen