kafka after reboot cluster or os remove all connectors

Question

I use rest api for Kafka Connect. After reboot server all connectors are deleted and return result is empty.

curl -H "Accept:application/json" localhost:8083/connectors

output is : []

Answer 1

Connectors are stored in Kafka topics

By default, Kafka (and Zookeeper) stores its topics/data under /tmp, which is wiped on restart

As mentioned in the comments, there are also other ways you'd end up with temporary data