I ran into this error today on ms-be1051 (seems harmless though, reproducible on every puppet run)
Info: Using configured environment 'production' Info: Retrieving pluginfacts Info: Retrieving plugin Info: Retrieving locales Info: Loading facts Error: Facter: error while resolving custom fact "lldp_neighbors": undefined method `[]' for nil:NilClass Info: Caching catalog for ms-be1051.eqiad.wmnet Info: Applying configuration version '(545b517cea) Cwhite - logging: clean up legacy logstash alerts'