Internal Server Error on deploying cron job on GAE

Question

I recently signed up and started playing with GAE for python. I was able to get their standard/flask/hello_world project. But, when I tried to upload a simple cron job following the instructions at https://cloud.google.com/appengine/docs/standard/python/config/cron, I get an "Internal Server Error".

My cron.yaml

cron:
- description: test cron
  url: /
  schedule: every 24 hours

The error I see

Do you want to continue (Y/n)?  y
Updating config [cron]...failed.                                                                                                                                                                                                         
ERROR: (gcloud.app.deploy) Server responded with code [500]:
  Internal Server Error.

Server Error (500)
A server error has occurred.

Have I done something wrong here or is it possible that I am not eligible to add cron jobs as a free user?

I don't know if this is the problem, but using / as the url for your cron job seems like a terrible idea! Change that to /my-cron-job or something similar. — gaefan
@JeffO'Neill that is what I originally had. I am only trying to get cron working before I write the real code. — Amit

dwelling dwelling · Accepted Answer · 2017-07-15T15:23:46

I was just struggling with this same issue. In my case, I am using the PHP standard environment and kept receiving the '500 Internal Server Error' when I tried to publish our cron.yaml file from the Google Cloud SDK with the command:

gcloud app deploy cron.yaml --project {PROJECT_NAME}

To fix it, I did the following:

I removed all credentials from my gcloud client

gcloud auth revoke --all
Reauthenticated within the client

gcloud auth login
Published the cron.yaml

gcloud app deploy cron.yaml --project {PROJECT NAME}

From what I can tell, the permissions in my gcloud client got out of sync which is what caused the internal server error. Hopefully that's the same case for you!

Internal Server Error on deploying cron job on GAE

2 Answers