Kafka

git log -- contrib/librdkafka | git name-rev --stdin

ClickHouse version	librdkafka version
21.10+ (#27883)	1.6.1 + snappy fixes + boring ssl + illumos_build fixes + edenhill#3279 fix
21.6+ (#23874)	1.6.1 + snappy fixes + boring ssl + illumos_build fixes
21.1+ (#18671)	1.6.0-RC3 + snappy fixes + boring ssl
20.13+ (#18053)	1.5.0 + msan fixes + snappy fixes + boring ssl
20.7+ (#12991)	1.5.0 + msan fixes
20.5+ (#11256)	1.4.2
20.2+ (#9000)	1.3.0
19.11+ (#5872)	1.1.0
19.5+ (#4799)	1.0.0
19.1+ (#4025)	1.0.0-RC5
v1.1.54382+ (#2276)	0.11.4

How Multiple MVs attached to Kafka table consume and how they are affected by kafka_num_consumers/kafka_thread_per_consumer