Tutor v17.0.0 error: no python application found, check your startup logs for errors

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1

I’m using tutor v17 and tutor-contrib-pod-autoscaling.
I kept getting error status with code 500.
Sometimes I could load LMS pages, sometimes I could not, 9 of 10 times I couldn’t.
I tried to check everything.
mongodb and mysql was running fine.
worker node storage had alot of free space.
worker nodes usage was low (<50% CPU and Memory).

All pods were running, one or two of them have status CrashLoopBackup, but there was more than one pod running.
I tried tutor k8s logs and the only error that I saw was:
“no python application found, check your startup logs for errors”
The number of users was low at that time, around 40 users/min.
Honestly, I have no idea what happened and what next to do.

I reverted to tutor v16.1.7 and it kind of running fine

2

Are you running this locally via minikube or on a deployment? If local, how much CPU and memory were assigned to the cluster?

3

@Syed_Muhammad_Dawoud
I’m using aws EKS, running on production, I have 2 worker nodes, each with 4CPU and 16GB RAM

4

Searching a bit on Google and found it might relate to uWSGI, still checking changes between 16.17 and 17.0.0

5

Ah, interesting. Can you share the references/links?

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I just copy the error “no python application found, check your startup logs for errors” and paste it to google, most of the top results relate to uWSGI. Here is one: nginx - uWSGI / Flask: "no python application found, check your startup logs for errors" - Stack Overflow

7

Still not sure what was the root cause, but killing worker nodes and replacing them with new ones did fix everything.
The old worker nodes were in Ready state and healthy though.

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