A few entries per day are normal, a few dozens or hundreds probably not. Wed Nov 30 04:15:05 UTC 2016 - https://jenkins.debian.net/job/reproducible_builder_armhf_26/11318/console got remote error with exit code 255 from ff2a-armhf-rb.debian.net for build #2 for ruby-buff-config on unstable/armhf