[Cloudevents] Switch to Debezium 2.0

[vjuranek]

No description provided.

[vjuranek]

Fixed also https://issues.redhat.com/browse/DBZ-5720

[jpechane]

@vjuranek Should not be README.md descriptions also updated because I suppose they are not aligned with the new kafkacat output?

[vjuranek]

Yes, it's not aligned, but no idea what I should use a replacement. Removing schema option make the command to succeed (which schema it fails), output is not nice, but still good enough for user to verify data was written there. Output look like this:

$ docker run --rm --tty   --network cloudevents-network   quay.io/debezium/tooling:1.2   kafkacat -b kafka:9092 -C -o beginning -q    -t customers3
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     Thomas*[email protected]
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 Edward
       Walker▒[email protected]

[jpechane]

@vjuranek Are the schemas different? If yes can we replace the samples by quering the schemas from apicurio registry?

[vjuranek]

@jpechane I'm not sure I follow. Which schemas? There is only one schema for all events. Mayeb there is misunderstanding as I forgot to remove schema from kafkacat -b kafka:9092 -C -o beginning -q -s value=avro -r http://schema-registry:8080 in previous example. This is a mistake - it doesn't work either. Will remove it soon.

[jpechane]

@vjuranek ok, maybe it would make sense to rebuild the example a bit more. Apicurio provides the JSON converter that does not embed schema in message but stores it in registry in the same way as Avro does. How about changing the exmaple to use it instead of Avro? In that case it would be nicely presentable.

[vjuranek]

@jpechane unfortunately this is not possible right now, as CloudEventsConverter works with schema registry only when avro is used and there are also other issues. I spent quite some time with it today with no reasonable results, so I'll try to prepare some reproducer and will raise an issue with Apicurio.

For the record, I found out when one wants to use confluent based tools, apis/ccompat/v6 should be used, i.e. the command should be something like this:

docker run --rm --tty   --network cloudevents-network   quay.io/debezium/tooling:1.2   kafkacat -b kafka:9092 -C -o beginning -s value=avro -r http://schema-registry:8080/apis/ccompat/v6 -t dbserver3.inventory.customers

With this, it still fails, but give at least somehow reasonable error:

% ERROR: Failed to format message in dbserver3.inventory.customers [0] at offset 0: Avro/Schema-registry message deserialization: REST request failed (code 404): {"message":"No content with id/hash 'contentId-0' was found.","error_code":40403}: terminating

So far no idea why kafkcat requests schema with ID 0 (which is not present, but starting ID 1 it is present), where it comes from and how to fix it.

[jpechane]

ok, let's wait with this PR when the issue is resolved. BTW, I'd prefer not use ccompat API just to have different tooling used.WRT the schema there is apicurio.registry.id-handler that should be set to the io.apicurio.registry.serde.Legacy4ByteIdHandler

[vjuranek]

Using apicurio.registry.id-handler doesn't seem to help, it just given me another exception. I also found out the issue mention above is already reported as apicurio-registry #2878

[Naros]

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