3771227 - Replication flow restart fails with taskAlreadyRunning error - SAP Datasphere

You want to restart a Replication Flow (e.g., stop and re-run due to a stuck or unexpected state). The following behavior is observed:

- The Stop button at the RF level is disabled (greyed out); only "Start Run" is available in the UI
- Clicking "Start Run" returns an error:

HTTP Status: 409
Error Code: taskAlreadyRunning
Technical Message: A conflicting task is already running.

SAP Datasphere

A prior RF runtime from an earlier execution was not properly terminated and remains registered as active in the system. This orphaned runtime holds a lock that prevents new runs from starting.

1. In the Data Integration Monitor, open the affected RF
2. Scroll down or apply a filter to locate the active/hanging runtime from an earlier date
3. Click the "Stop Run" icon at the runtime level (this is distinct from the RF-level Stop button)
4. Wait for the runtime status to change to stopped/completed
5. Click "Start Run" to restart the RF

taskAlreadyRunning, conflicting task, Replication Flow, stuck, cannot stop, Stop button disabled, Start Run, RF Monitor, runtime level, Stop Run, orphaned runtime, , KBA , DS-DI-RF , Replication Flow Runtime , Problem