[jira] [Commented] (AVRO-2077) Avro tools should have an option to check reader-writer compatibility

["Nandor Kollar (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AVRO-2077?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16189672#comment-16189672 ] 

Nandor Kollar commented on AVRO-2077:
-------------------------------------

[~howellbridger] AVRO-1933 and AVRO-2003 provides details about incompatibilities between reader and writer schemas. It seems that there's no tool in avro-tools to display these for a given file and a (reader) schema, with this Jira I wanted to address this gap: {{schemaCompatTool input_Avro_file reader_schema_file}}. This can be made bi-directional, but I don't see any point for checking if a given (writer) schema present in an existing Avro file could be used to as reader schema.

For your case, I'd create an other tool with different parameters: {{mutualSchemaCompatTool schema_1 schema_2}} (either URLs or files with Avro JSON schema), and it would list the bi-directional compatibility (which could be implemented as part of this Jira too). How about this approach?

> Avro tools should have an option to check reader-writer compatibility
> ---------------------------------------------------------------------
>
>                 Key: AVRO-2077
>                 URL: https://issues.apache.org/jira/browse/AVRO-2077
>             Project: Avro
>          Issue Type: New Feature
>          Components: java, tools
>            Reporter: Nandor Kollar
>            Priority: Minor
>             Fix For: 1.9.0
>
>
> It seems that avro-tools doesn't have any option to check for a given Avro file and a given reader schema (JSON file or URL) that the reader's schema is compatible with the writer's schema. This tool should report every compatibility problem (if there's any).
> According my knowledge, there's no such option for avro-tools as of now.



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