@New_User
There is the following resolved jira for the creation of a new putIceberg NiFi processor:
https://issues.apache.org/jira/browse/NIFI-10442
Apache has size limits on distributions and it does not appear as though this processor nar was included in the Apache release. You would need to add the nifi-iceberg-processors-nar manually to your NiFi installation for it become available for use.
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Thank you,
Matt