is changing namespace and name of an avro schema considered backwards compatible?

Andrew Xue

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Dec 12, 2016, 3:11:16 PM12/12/16

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we have a k-stream that produced a message of something like

x.y.z.MyNameA

now we want to change to like

a.b.SomeOtherName

otherwise, the schema remains exactly the same.

how will schema-registry react to that?

Craig Hooper

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Dec 12, 2016, 7:23:56 PM12/12/16

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Are you talking about the topic name i.e. the subject it will be registered under? If so then the registry will consider them to be unrelated i.e. they are registered as two completely different schemas.

Andrew Xue

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Dec 12, 2016, 9:07:23 PM12/12/16

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no, it will be the same topic.

Ewen Cheslack-Postava

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Dec 13, 2016, 2:23:10 AM12/13/16

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I believe that is an incompatible change based on the Schema Resolution and Canonical Form rules in the spec: https://avro.apache.org/docs/1.8.1/spec.html#Schema+Resolution (note rules saying records, enums, etc have to have matching names).

That said, the best way to find out is to just test it!

-Ewen

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Andrew Xue

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Dec 13, 2016, 3:20:24 PM12/13/16

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yep yep -- i just tested it and ... it works! so i guess it is compatible (backwards at least)

On Monday, December 12, 2016 at 11:23:10 PM UTC-8, Ewen Cheslack-Postava wrote:

I believe that is an incompatible change based on the Schema Resolution and Canonical Form rules in the spec: https://avro.apache.org/docs/1.8.1/spec.html#Schema+Resolution (note rules saying records, enums, etc have to have matching names).

That said, the best way to find out is to just test it!

-Ewen

On Mon, Dec 12, 2016 at 6:07 PM, Andrew Xue <and...@lumoslabs.com> wrote:

no, it will be the same topic.

On Monday, December 12, 2016 at 4:23:56 PM UTC-8, Craig Hooper wrote:
Are you talking about the topic name i.e. the subject it will be registered under? If so then the registry will consider them to be unrelated i.e. they are registered as two completely different schemas.

On Tuesday, 13 December 2016 07:11:16 UTC+11, Andrew Xue wrote:
we have a k-stream that produced a message of something like

x.y.z.MyNameA

now we want to change to like

a.b.SomeOtherName

otherwise, the schema remains exactly the same.

how will schema-registry react to that?

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