Github user mcgilman commented on the issue:
https://github.com/apache/nifi/pull/3066
It appears that the nifi-aws-nar was already including the newer versions
of jackson. However, the nifi-aws-service-api-nar was not. There is no
implementations in the service api, however the interfaces in the api contain
classes which are part of the aws-java-sdk so the artifacts get bundled there
too.---
