Using a product like Solr over time makes you blind to certain things. Logging is one such area. For me it started with realizing that the default logging was way too verbose, and soon I found a two year old bug ticket with the title “Reduce logging during startup and shutdown” that I brought to life again.
Turned out that we could reduce the log from a
bin/solr start -f from 31 to 9 lines, while
bin/solr create -c foo was shrunk from 129 lines to 48 lines and
bin/solr start -c -f was shrunk from 67 to 20 lines! Alan Woodward and Alexandre Rafalovitch joined the effort and soon SOLR-5563 was also committed.