I see the following error message in my log file for a Splunk deployment server
03-29-2019 17:15:44.710 -0400 ERROR FilterManagingHandlerSupport - Name may not be empty or all-whitespace.
splunk@xxxxxxxxxxxxx:/opt/splunk/var/log/splunk$ deployer
An error occurred:
Name may not be empty or all-whitespace.
I found the issue. There was a blank stanza in the serverclass.conf
[serverClass:]
whitelist.0 = xxxxxxxxxxx.com
whitelist.1 = xxxxxxxxxxx.com
restartSplunkd = true
[serverClass::app:]