We had issue with our production environment where server was generating huge amount of Archive logs and causing archive logs to fill frequently, which eventually cause shows unexpected error on application server.
As an solution, refer below notes from Oracle support.
- P6 Global Scheduled Services Are Stuck In A “Running” State (Doc ID 1400104.1)
- Master Note For Primavera P6 Services (Doc ID 1612845.1)
- How To Restart Project Scheduled Services That Are “Stuck” In A Running State (Doc ID 1418876.1)