How to upgrade the version of Kafka library used by Kafka Engine in ClickHouse?
And, how to know actual version in use?
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1 Answers
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If you're using the shared build, you might be able to grab the needed DSO files of librdkafka and replace the old one. Though there is a chance that the ABI is incompatible as librdkafka hasn't even a stable release yet. Otherwise, just rebuild ClickHouse with the librdkafka you need.
As for looking up the version of current librdkafka, here is one way,
select * from system.build_options
get the VERSION_GITHASH and do
git ls-tree <VERSION_GITHASH> contrib/librdkafka
