I think the list link is wrong :( On Sat, Sep 26, 2026 at 7:03 AM Dheeraj Turaga <[email protected]> wrote:
> Hi all, > > Following the discussion [1], I'm calling for lazy consensus on how we > handle Dags whose TaskGroups depend on each other in a cycle when each > group is treated as a single unit (their task dependencies themselves > are acyclic). > > Proposal: > > 1. In 3.4.0, fix the Grid/Graph HTTP 500 for these Dags [2]. We need this > fix regardless: filtering the Grid or Graph view can create such a > cycle in a Dag that has none. > > 2. Also in 3.4.0, deprecate these Dags [3]. Parsing them issues a > TaskGroupCycleDeprecationWarning and shows a Dag warning in the UI > naming the TaskGroups involved. They keep parsing and running. > > 3. From 3.5.0, reject them at parse time with an import error [4]. As > Jarek suggested, we treat this as a bug fix, since these dependencies > were never intended to be supported. This is an exception to our > deprecation policy, which would otherwise keep deprecated behaviour > working until 4.0. > > 4. Scope: only cycles between TaskGroups. Other restrictions on > dependencies into or out of TaskGroups are out of scope and would need > their own discussion. > > The lazy consensus is open for 72 hours, until Tuesday, 29 September 2026, > 05:00 UTC. If there are no objections by then, I'll consider it accepted. > > [1] https://lists.apache.org/thread/sossl7b2w2ftyk4028qrhps > [2] https://github.com/apache/airflow/pull/73724 > [3] https://github.com/apache/airflow/pull/73746 > [4] https://github.com/apache/airflow/pull/73087 > > Thanks, > Dheeraj >
