azure-samples / aci-event-driven-worker-queue Goto Github PK
View Code? Open in Web Editor NEWLearn how to use Azure Container Instances to scale up containers on-demand in response to incoming work.
License: MIT License
Learn how to use Azure Container Instances to scale up containers on-demand in response to incoming work.
License: MIT License
[X] feature request
[X] Bug (in any real-world use case)
Recreate:
Run sample as is, but modify ACI worker to fail.
Logs from Failure
None
If ACI worker fails, the queue message should eventually be put back into the queue.
We handle this by passing the queueMessage.id to the ACI code and having it be responsible for deleting the message just before the ACI
Any and all
Any and All
Currently when Azure Functions is triggered by a Queue, it will delete the associated queueMessage if and when the Functions completes successfully. This may be a nice feature when the task is run within Functions, but it's a deal breaker when a long-running task is run within the ACI as a detached container.
And that's exactly the point of this sample.
The queueMessage is deleted as soon as Functions finishes launching the ACI. That means that if the task running in the ACI fails, the queueMessage can't be added back to the queue. Any task that fails in the ACI will dissapear and never be run.
That is NOT how task queues are supposed to work. So, it is NOT possible to use Queues to trigger Functions to launch ACI. (Unless a feature is added to Functions that turns off the auto-delete-message feature)
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