Native ext error on MRI 2.3.0

[rwz]

I'm running hermann consumer on MRI 2.3.0 and it crashes with the following error:

ruby: symbol lookup error: /app/vendor/bundle/ruby/2.3.0/gems/hermann0.26.1.0/ext/hermann/hermann_rdkafka.so: undefined symbol: inflateInit2_

I'm running this code on a Heroku dyno, so unfortunately this little description is all I have, no crash dump or more logs are available. :(

[rwz]

Same error on MRI 2.2.4

[rtyler]

@rwz this might be due to a zlib-dev dependency missing, I'm not entirely sure though. Do you know any more about the installed native libraries on the dyno?