Github user ijokarumawak commented on the issue:
https://github.com/apache/nifi/pull/1877
@markap14 Thanks for pointing that out. I think I got mislead by the two
getSchema methods in SchemaRegistryService. I accidentally removed the 2nd form
during refactoring and that caused for the unnecessary InputStream sneaked into
RecordSetWriterFactory.
```
// This one had been used by readers
public final RecordSchema getSchema(final FlowFile flowFile, final
InputStream contentStream, final RecordSchema readSchema) throws
SchemaNotFoundException, IOException {
// This one had been used by writers
public RecordSchema getSchema(final FlowFile flowFile, final
RecordSchema readSchema) throws SchemaNotFoundException, IOException {
```
I pushed another commit to bring back the 2nd signature above, and change
FlowFile to Map<String, String>. Compiled and contrib-check passed locally.
Also tested different readers/writers with a live flow. Thanks again for your
time to review!
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