title: Google App Engine "Handling signal: term" everytime
body: <p>I'm facing a problem with google app engine. Like on this post : <a href="https://stackoverflow.com/questions/63392824/google-app-engine-terminates-after-handling-signal-term">63392824</a></p>
  <p>My flask application is triggered by POST request, do some stuffs during maybe one hour and that's all.</p>
  <p>After some times I see that my new requests are stopped without error. This is what I see on the logs :</p>
  <pre><code>[..some logs without errors..] 
      2020-09-07 07:24:09 app-engine-name[20200903t092926]  [2020-09-07 07:24:08 +0000] [10] [INFO] Handling signal: term
  [...]
      2020-09-07 07:24:10 app-engine-name[20200903t092926]  [2020-09-07 07:24:10 +0000] [21] [INFO] Worker exiting (pid: 21)
      2020-09-07 07:24:10 app-engine-name[20200903t092926]  [2020-09-07 07:24:10 +0000] [25] [INFO] Worker exiting (pid: 25)
  </code></pre>
  <p>How can I debbug this and find the reason of this term signal ?</p>
  <p>Thanks in advance for your time !</p>
  <h3>EDIT</h3>
  <p>I try to upscale my app to F4_1G (2G memory limit) but the problem is steel appearing.
  <strong>The memory seems to not be the problem</strong> like I see on Googe monitoring :
  <a href="https://i.stack.imgur.com/1d0ZT.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/1d0ZT.jpg" alt="Google App Engine Memory Monitoring" /></a></p>