There is warning without logging code:

09:17:08,750 WARN  [com.netflix.config.sources.URLConfigurationSource] (MSC service thread 1-7) No URLs will be polled as dynamic configuration sources.

Looks like this is caused by hystrix as it's missing config.properties file:
[1] https://github.com/Netflix/Hystrix/issues/275

This Warning should have logging code and hystrix updated not to log it on WARN level.