Martyn Inglis 897ad6a957 prevent race conditions in run_scheduled_jobs queuing jobs multiple times ...

we were running into issues where multiple beats queue up the
run_scheduled_jobs task at the same time, and concurrency issues with selecting
scheduled jobs causes both tasks to trigger processing of the job.

Use with_for_update, which calls through to the postgres SELECT  ... FOR UPDATE
which locks other SELECT FOR UPDATES (ie other threads running same code) until
the rows are set to pending and the transaction completes - so the second
thread will not find any rows

2016-10-07 12:35:02 +01:00

..

__init__.py

Celery tests

2016-02-09 13:31:45 +00:00

celery.py

Merge branch 'master' into celery-spike

2016-02-12 09:36:49 +00:00

provider_tasks.py

Updated clients to have a more robust error handling

2016-09-22 17:18:05 +01:00

research_mode_tasks.py

Use the notification types enum for the notifications.notification_type.

2016-06-29 11:50:54 +01:00

scheduled_tasks.py

prevent race conditions in run_scheduled_jobs queuing jobs multiple times

2016-10-07 12:35:02 +01:00

tasks.py

Fix for the job status

2016-10-05 14:56:32 +01:00