Question

App Platform - Weird restarts + 504 Error

Posted on May 4, 2023
Development DigitalOcean DigitalOcean App Platform Engineering Node.js Programming Project
Asked by micktdj

Hi community and thank your for your time.

I’m using App Platform since 3 months (come from Heroku) and i have two strange behaviors :

First , sometimes my Node.JS app reboot automatically for no reasons. I can see the “restart count” insights which increases 7/8 times a day. I’m using winston and Logtail to track errors in my app but there is no log before the “Server listening…” line. Also, the RAM and CPU are fine. How can i know why my app is restarting ?

image alt text

Secondly, sometimes, i have the following error during requests between two services (APIs) :

      <!DOCTYPE html>
      <html>
      <head>
          <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">
          <meta name=\"robots\" content=\"noindex\">
          <style>body,html{height:100%;margin:0}body{display:flex;align-items:center;justify-content:center;flex-direction:column;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}p{text-align:center;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;color:#000;font-size:14px;margin-top:-50px}p.code{font-size:24px;font-weight:500;border-bottom:1px solid #e0e1e2;padding:0 20px 15px}p.text{margin:0}a,a:visited{color:#aaa}</style>
      </head>
      <body>
      <p class=\"code\">
        Error
      </p>
      <p class=\"text\">
        We encountered an error when trying to load your application and your page could not be served. Check the logs for your application in the App Platform dashboard.
      </p>
        <div style=\"display:none;\">
          <h1>
    upstream_reset_before_response_started{connection_termination} (503 UC)      </h1>
          <p data-translate=\"connection_timed_out\">App Platform failed to forward this request to the application.</p>
      </div>
      </body>
      </html>

It’s critical becauses it breaks somes requests. I have no logs for that too.

Thank you for your help.

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