@spartakus You will want to review the release notes for all release between 1.23. and 1.28.1 https://cwiki.apache.org/confluence/display/NIFI/Release+Notes/#ReleaseNotes-Version1.23.0 You'll notice a number of components deprecated. Deprecated components are not removed, but that are marked as deprecated and will log if used that they are deprecated. Deprecated components will eventually be removed form Apache NiFi (most removed in NiFi 2.0). You'll also make note of any items in the release notes that state: Moved <XYZ> to optional build profiles This means that these components were removed from Apache NiFi. These components can be added manually later by downloading the nars from the central maven repository and adding them to the NiFi lib directory if you need them still. https://mvnrepository.com/artifact/org.apache.nifi Make a back up of your flow.json.gz, nifi.properties, and optionally flow.xml.gz files before you upgrade. Otherwise, I see no issues with upgrading from 1.22 -- > 1.28 directly. Please help our community thrive. If you found any of the suggestions/solutions provided helped you with solving your issue or answering your question, please take a moment to login and click "Accept as Solution" on one or more of them that helped. Thank you, Matt
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