Some 502 errors in GCP HTTP Load Balancing
<p>Our load balancer is returning 502 errors for some requests. It is just a very low percentage of the total requests, we have around 36000 request per hour and about 40 errors per hour, so just a 0,01% of the requests returns an error. </p>

<p>The instances are healthy when the error occurs and we have added this forwarding rule to the firewall for the load balancer: <b>130.211.0.0/22   tcp:1-5000   Apply to all targets</b></p>

<p>It is not a very serious problem because the application tolerates such errors, but I would like to know why they are given.</p>

<p>Any help will be apreciated.</p>