Github user mcgilman commented on the issue:
https://github.com/apache/nifi/pull/2084
@alopresto I believe the exclusions for the solr processors are incorrect.
`jackson-core` has been excluded but not explicitly added. Also, I noticed that
the change to `jackson-annotations` made in the root pom, affects the version
of `jackson-annotations` which `solr-solrj` brings in transitively. It appears
that prior to this PR it also overriding (2.6.1 vs 2.5.4). Because the use of
jackson is so widespread and the behavior of dependency management with regards
to transitive dependencies, I'm wondering if it makes to remove
`jackson-annotations` and allow individual modules to pull it in using the
`jackson.version` property introduced here. Thoughts?
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