Hi Eduardo, Thank you for raising this issue. More information may be required to understand or reproduce the issue. Can you please share: - OpenStack version - type of deployment (kolla?) - operating system - any hints on how to reproduce Can you please open a new bug at https://bugs.launchpad.net/blazar and include all these extra details? Thanks, Pierre On Mon, 26 Jan 2026 at 16:20, Eduardo Morais <eduardo.morais@lsd.ufcg.edu.br> wrote:
The first time the problem appeared, it wouldn’t allow listing the leases. So I went to check the logs and this log showed up. I restarted the service, and less than a week later the same thing happened again.Does anyone have any idea why this error keeps happening, and what the possible consequences would be of increasing the maximum number of connections?
LOG: ERROR oslo.service.loopingcall sqlalchemy.exc.TimeoutError: QueuePool limit of size 2 overflow 50 reached, connection timed out, timeout 30.00 (Background on this error at: https://sqlalche.me/e/14/3o7r) 2026-01-26 15:11:45.671 7 ERROR oslo.service.loopingcall 2026-01-26 15:11:45.672 7 WARNING oslo.service.loopingcall [None req-3c69a13f-1bf2-4ace-9b7e-81249a6db22b - - - - - -] Function 'blazar.manager.service.ManagerService._process_events' run outlasted interval by 20.00 sec 2026-01-26 15:11:45.673 7 DEBUG blazar.manager.service [None req-3c69a13f-1bf2-4ace-9b7e-81249a6db22b - - - - - -] Trying to get events from DB. _process_events /var/lib/kolla/venv/lib/python3.10/site-packages/blazar/manager/service.py:233 2026-01-26 15:12:15.675 7 ERROR oslo.service.loopingcall [None req-3c69a13f-1bf2-4ace-9b7e-81249a6db22b - - - - - -] Fixed interval looping call 'blazar.manager.service.ManagerService._process_events' failed: sqlalchemy.exc.TimeoutError: QueuePool limit of size 2 overflow 50 reached, connection timed out, timeout 30.00 (Background on this error at: https://sqlalche.me/e/14/3o7r) 2026-01-26 15:12:15.675 7 ERROR oslo.service.loopingcall Traceback (most recent call last): 2026-01-26 15:12:15.675 7 ERROR oslo.service.loopingcall File "/var/lib/kolla/venv/lib/python3.10/site-packages/oslo_service/loopingcall.py", line 67, in func 2026-01-26 15:12:15.675 7 ERROR oslo.service.loopingcall return f(*args, **kwargs) 2026-01-26 15:12:15.675 7 ERROR oslo.service.loopingcall File "/var/lib/kolla/venv/lib/python3.10/site-packages/blazar/manager/service.py", line 234, in _process_events 2026-01-26 15:12:15.675 7 ERROR oslo.service.loopingcall events = db_api.event_get_all_sorted_by_filters( 2026-01-26 15:12:15.675 7 ERROR oslo.service.loopingcall File "/var/lib/kolla/venv/lib/python3.10/site-packages/blazar/db/api.py", line 102, in decorator 2026-01-26 15:12:15.675 7 ERROR oslo.service.loopingcall res = func(*args, **kwargs) 2026-01-26 15:12:15.675 7 ERROR oslo.service.loopingcall File "/var/lib/kolla/venv/lib/python3.10/site-packages/blazar/db/api.py", line 227, in event_get_all_sorted_by_filters 2026-01-26 15:12:15.675 7 ERROR oslo.service.loopingcall return IMPL.event_get_all_sorted_by_filters(sort_key, sort_dir, 2026-01-26 15:12:15.675 7 ERROR oslo.service.loopingcall File "/var/lib/kolla/venv/lib/python3.10/site-packages/blazar/db/sqlalchemy/api.py", line 355, in event_get_all_sorted_by_filters