In https://phabricator.wikimedia.org/T172681 we discovered that the combination of pmacct + librdkafka 0.11 on rhenium was causing problems to the Analytics Kafka brokers.
I tried to fix the problem with https://gerrit.wikimedia.org/r/371937 but I forgot to verify if it was supported by the current Stretch version, and of course it is not (1.6.1).
The 1.6.2 version seems supporting librdkafka settings, so it would be enough to package/deploy 1.6.2 on
Opened a Debian bug: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=872327
I masked the related unit on rhenium and disabled puppet.