Hi Vijay, We've upgraded directly from 1.28.1 to 2.6. It worked, but at first the server wouldn't start correctly. We had to mess around with some renamed controller services and nar bundles (for example using DistributedMapCacheClient/Server to MapCacheClient/Server). According to Jira, those breaking changes happened in 2.0.0 already (https://issues.apache.org/jira/browse/NIFI-13596) so I don't think you'd have a smoother upgrade by going to 2.0.0 first.
Btw, 2.7 was unusable to us because of memory leaks in the DBCP connection pools. We went for 2.6 instead, but it should be fixed in 2.8 https://issues.apache.org/jira/browse/NIFI-15372 Kind regards, Isha From: Vijay Chhipa <[email protected]> Sent: Tuesday, 24 March 2026 13:50 To: [email protected] Cc: Jakobsson Stefan <[email protected]>; Jim Halfpenny <[email protected]> Subject: Re: Upgrade from 1.28... One more question for migration, do I HAVE to migrate to 2.0 first and then to 2.7.2 ? Thanks On Mar 24, 2026, at 03:45, Jim Halfpenny via users <[email protected]<mailto:[email protected]>> wrote: Hi Stefan, Once you've upgraded to 2.0 you should be able to upgrade directly to 2.7.2. There are some changes and deprecated features you should be aware of, you can find more information in the NiFi release notes: https://cwiki.apache.org/confluence/display/NIFI/Migration+Guidance#MigrationGuidance-Migratingto2.8.0 Kind regards, Jim On 24 Mar 2026, at 08:24, Jakobsson Stefan via users <[email protected]<mailto:[email protected]>> wrote: Hello Group, We are looking into upgrading from 1.28, and I know that I need to go from 1.28 to 2.0, but if we want to go on from there, can we go for instance from 2.0 directly to 2.7.2? Or do we need to "stage" the upgrades more? Stefan Jakobsson Systems Manager | Scania IT, IKCA | Scania CV AB Phone: +46 8 553 527 27 Mobile: +46 7 008 834 76 Forskargatan 20, SE-151 87 Södertälje, Sweden [email protected]<mailto:[email protected]>
