I am getting a lot of these errors in my App Engine Standard Environment Python 3 application. The application seems to initialize and to work fine: I can't see any sort of failure during initialization.
How can I figure out the cause? Could it be ordinary instance scale-down despite what this log says?
Start program failed: termination triggered by nginx exit
[INFO] Shutting down: Master
Worker exiting (pid: 20)
[INFO] Worker exiting (pid: 23)
Handling signal: term
Quitting on terminated signal
I see a number of these shut-down errors in a row, suggesting that multiple instances are shutting down. So, the last step from 1 to 0 instances is not the relevant one.
The app.yaml is as follows:
runtime: python39
service: iris3
env_variables:
TOKENPS: 54
I tested a Hello World example and found that this is the ordinary log during instance scaledown.
The log should be considered a bug. It clearly says that start -- i.e., initialization -- is failing, where in fact nothing is failing and this involves shutdown rather than startup.