Hey Kelly,

Welcome and thanks for sharing your questions here with the community. 
 Generally, when getting *4xx* and *5xx* responses from your App Engine 
application, I would suggest looking for related request logs in Stackdriver 
Logging <https://cloud.google.com/logging/docs/quickstart-sdk#explore> which 
you seem to have done.  The log you've pasted in your initial message 
suggests the application is consuming more memory than releasing.

   - What runtime are you using?
   - You mention that the application is processing Google Drive files. 
    How large are these files?
   - Can you point to the APIs and client libraries the application uses to 
   handle the files?  I ask as it's possible the files are too large to be 
   processed entirely at once.
   - Do you still get this same error if using instances with greater 
   - Are you using the standard environment or flexible environment?

On Thursday, October 13, 2016 at 12:05:56 AM UTC-4, Kelly Ingram wrote:
> I have a cron job setup to run every 20 minutes which has been running as 
> expected until 2 days ago where I am now getting intermittent failures and 
> GAE is returning a status of 500 with the WARNING message:
> While handling this request, the process that handled this request was 
> found to be using too much memory and was terminated. This is likely to 
> cause a new process to be used for the next request to your application. If 
> you see this message frequently, you may have a memory leak in your 
> application.
> and sometimes includes the INFO message:
> This request caused a new process to be started for your application, and 
> thus caused your application code to be loaded for the first time. This 
> request may thus take longer and use more CPU than a typical request for 
> your application.
> It will run ok once or twice and then randomly it won't run and returns 
> the above messages.  
> Nothing is changing in the code or the files it's processing on Google 
> Drive so I am confused as to what could be the issue.
> I've also occasionally received a status of 404 over the past few days. 
>  Again with no obvious reason why.
> Anyone else receiving these errors?
> Thanks
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  • [google-appengine]... Kelly Ingram
    • [google-appen... 'Nicholas (Google Cloud Support)' via Google App Engine

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