- update to 2.1.1:
* Avoid duplicate messages when a fetch response is received
* in the middle of an offset validation request
* Fix segmentation fault when subscribing to a non-existent
topic and calling `rd_kafka_message_leader_epoch()` on the polled
`rkmessage`
* Fix a segmentation fault when fetching from follower and the
partition lease expires while waiting for the result of a list offsets
operation
* Fix documentation for the admin request timeout, incorrectly
stating -1 for infinite
* timeout. That timeout can't be infinite.
* Fix CMake pkg-config cURL require and use
* pkg-config `Requires.private` field
* Fixes certain cases where polling would not keep the consumer
* in the group or make it rejoin it
* Fix to the C++ set_leader_epoch method of TopicPartitionImpl,
* that wasn't storing the passed value
* Duplicate messages can be emitted when a fetch response is
received in the middle of an offset validation request. Solved by
avoiding a restart from last application offset when offset validation
succeeds.
* When fetching from follower, if the partition lease expires
after 5 minutes, and a list offsets operation was requested
to retrieve the earliest or latest offset, it resulted in
segmentation fault. This was fixed by allowing threads different
from the main one to call the `rd_kafka_toppar_set_fetch_state`
function, given they hold the lock on the `rktp`.
* In v2.1.0, a bug was fixed which caused polling any queue to
reset the `max.poll.interval.ms`.