In order to make your issue reports as actionable as possible, please provide the following information, depending on the issue type.

Bug report

For bug reports, provide this information, please:

What Debezium connector do you use and what version?

2.6.1.Final

What is the connector configuration?

Oracle RAC

What behavior do you expect?

The edge case scenario is a 2-node Oracle RAC:

DB is at SCN #10
Node1 flushes
SCN #10 is in Redo1
Node2 flushes
For some reason which we don't understand SCN#10 is flushed but not yet available in the Redo2
DBZ fetches SCN10 - SCN 20
SCN #10 now appears in Redo2
DBZ now fetches SCN 20 - SCN 30
SCN 10 in Redo 2 is lost forever

What behavior do you see?

Abandoned transcations

Do you see the same behaviour using the latest released Debezium version?

Was OK in 2.3