Github user joewitt commented on the issue:
https://github.com/apache/nifi/pull/1682
@markap14 ok have reviewed it quite a bit and much happier with the results.
1. 'Schema Write Strategy' default should be schema.name rather than
schema.text SchemaRegistryService:73 is where this is set
2. QueryRecord with a GrokReader where schema access is 'Use String fields
from Grok expression' what do you do for the Writer? It cannot lookup the
schema by name unless you've registered it and if you've done that then the
grok expression inferred schema is a bit odd.
3. Hortonworks Schema Registry access strategy should provide a link to the
hortonworks schema registry in github so others can know the serde approach for
prepending header bytes to cover protocol version, schema identifier, and
schema version. This is here: https://github.com/hortonworks/registry
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