Debezium Server delivery guarantee

[Peter Nicholson]

Hello,

We are considering the usage of Debezium Server with the Postgres connector and HTTP sink. What are the delivery guarantees for events being emitted by Debezium Server? We have tested the following scenario which results in Debezium not resending a failed message:

1. Context: Debezium Server configured with Postgres connector and HTTP sink
2. Scenario:
   1. WAL entry is made, HTTP sink returns error status
      
   2. WAL entry is made, HTTP sink returns OK status
3. Result
   1. The first message is not retransmitted

Is Debezium Server's delivery guarantee at most once?

Cheers,

Peter

[Chris Cranford]

Hi Peter -

So looking at the HTTP sink code, I personally think the scenario you raised is a bug.  It does appear that when we get any HTTP response other than OK, No-Content, or Accepted that we simply log we cannot deliver the event and move onward.  I don't think that's accurate behavior at all, so could you please raise a Jira issue on this if one does not already exist?

Thanks,
CC

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