Matt Burgess updated NIFI-5213:
    Status: Patch Available  (was: In Progress)

> 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
>            Assignee: Matt Burgess
>            Priority: Minor
> 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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