[BP][IMP] queue_job: prevent commit during queue job execution #881
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This allows creating test job with a long duration for stress testing.
When a SerializationFailure occurs when updating the state of dependent jobs, the cursor is not usable anymore so the retry failed with `current transaction is aborted`. A savepoint fixes that.
In this commit we cleanly separate the job acquisition (i.e. verifying the job is in the exepected state, marking it started and locking it) from job execution. We also avoid trying to start the job if it is already locked by using SKIP LOCKED and exiting early. Indeed in such situations the job is likely already being handled by another worker so there is no point trying to start it, so we exit early and let it be handled either by the other worker or the dead job requeuer.
Extract the logic to run one job out of the /queue_job/runjob route. Towards making this logic reusable in other job executors.
Towards making this logic reusable.
Since we are not going to delete records nor modify foreign keys, we can take a weaker lock.
…rts patches Otherwise monkey-patches could be added twice when instantiating new test classes.
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Hi @guewen, |
This would release the job lock, causing spurious restarts by the dead jobs requeuer.
sbejaoui
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BP of #880
based on #874