I am running 6.4.2 on MAC OS X El Capitan.
The following is showing up in my logs:
2016-07-12T02:24:11.083Z W CONTROL No SSL certificate validation can be performed since no CA file has been provided; please specify an sslCAFile parameter
2016-07-12T02:24:11.236Z I ACCESS permissions on /Volumes/2TB Media/Applications/Splunk/var/lib/splunk/kvstore/mongo/splunk.key are too open
Looking at my KVStores:
Failed to fetch REST endpoint uri=https://127.0.0.1:8089/services/server/introspection/kvstore/serverstatus?count=0 from server=https://127.0.0.1:8089
I've found all of this while trying to get my Splunk App for Stream to work since the configurations pages are blank.