We tried to upgrade flink version to 1.17 and operator version to 1.17, but the

upgradeMode: stateless

doesn't seem to work as expected (read from the earliest offset). but was working fine with flink version 1.15 and operator version 1.15 Anyone has any idea why it is not working and what has changed ?

I think it should work as before , could you share the operator logs for the upgrade that didn't work as expected?