[jira] [Created] (NIFI-5213) Allow AvroReader with explicit schema to read files with embedded schema

["Matt Burgess (JIRA)" <ji...@apache.org>]

Matt Burgess created NIFI-5213:
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             Summary: Allow AvroReader with explicit schema to read files with embedded schema
                 Key: NIFI-5213
                 URL: https://issues.apache.org/jira/browse/NIFI-5213
             Project: Apache NiFi
          Issue Type: Improvement
          Components: Extensions
            Reporter: Matt Burgess


AvroReader allows the choice of schema access strategy from such options as Use Embedded Schema, Use Schema Name, Use Schema Text, etc. If the incoming Avro files will have embedded schemas, then Use Embedded Schema is best practice for the Avro Reader. However it is not intuitive that if the same schema that is embedded in the file is specified by name (using a schema registry) or explicitly via Schema Text, that errors can occur. This has been noticed in QueryRecord for example, and the error is also not intuitive or descriptive (it is often an ArrayIndexOutOfBoundsException).

To provide a better user experience, it would be an improvement for AvroReader to be able to successfully process Avro files with embedded schemas, even when the Schema Access Strategy is not "Use Embedded Schema". Of course, the explicit schema would have to match the embedded schema, or an error would be reported (and rightfully so).



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