Flex Env App Engine App going offline for around 10 minutes at the same time every day

[Ben Rometsch]

I have a Java (play framework) application running in the GAE flexible environment that has been running perfectly for months. For the last week the application has been showing error messages at around 13:00 UTC each day. After around 10 minutes the app resumes normal operation without me doing anything. I noticed today that one of the VMs was restarted just before the outage (https://s3-eu-west-1.amazonaws.com/dabeeeenster-screenshots/App_Engine_Instances_-_HoxtonMix_Admin_EU_2017-11-01_14-00-21.png). Is there anything I can do to diagnose what is going wrong? 

The relevant part of my app.yaml is:

runtime: custom
env: flex

resources:
  cpu: 1
  #memory_gb: 1.0
  disk_size_gb: 10

manual_scaling:
  instances: 2

[Ben Rometsch]

As an update, I notice that both VMs were restarted at similar times https://s3-eu-west-1.amazonaws.com/dabeeeenster-screenshots/App_Engine_Instances_-_HoxtonMix_Admin_EU_2017-11-01_14-03-37.png

[Kenworth (Google Cloud Platform)]

Hi Ben, a thread like this is off-topic for Google Groups. As it may potentially be a defect on the platform and most likely lead to a specific situation which may require some exchange of project information to reproduce the behavior you described, I highly encourage you to submit a defect report as described in this article so that proper attention and weight will be given to it. We monitor that issue tracker closely.

We look forward to this issue report.

[Ben Rometsch]

OK thanks - have submitted https://issuetracker.google.com/issues/68793577