Github user joewitt commented on the issue:
https://github.com/apache/nifi/pull/1022
Other.commit
Nifi.commit
This means at most once. Loss is possible but dupes are not.
Nifi.commit
Other.commit
This means at least once. Dupes are possible but loss is not.
Default mode should always be at least once.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---