Hi Burak,
thanks for your response.
Not really sure about our Kafka but we had a performance issue (Performance Sentry API - on Premise, Kubernetes - #2 by chadwhitacre) shortly before this issue, and I suppose this was Kafka related.
What I did now (since our Devs were already a little impatient) was to completely nuke the Kafka Volume (and Zookeeper of course) and, on this occasion, I upgraded to 21.3.1 (will do further upgrades when I have a little more time). So we lost the events from (I suppose) the last week, but that’s quite ok, since our Sentry is running as supposed again.
A lot of efforts has been made in the self hosted documentation (https://develop.sentry.dev/self-hosted/), I appreciate this very much, but what I’m still missing is some documentation about the Kafka Setup (which topics are used, which consumer group is responsible for which topic and so on…). I think this could be really helpful for debugging Kafka Issues… maybe there is someone really familiar (community or Sentry dev maybe?) with the Sentry Kafka setup and could complete the documentation?
(Marked as solution - bc: nuked Kafka/Zookeeper Volume)