What is the Issue?In Hotels.com™ (part of Expedia Group™) we recently implemented an Istio Service mesh. The Istio service mesh sidecar injector automatically attaches an istio-proxy sidecar to every pod. Once all apps are enabled with istio-proxy sidecars, a common issue faced by many apps and services are HTTP 503/504 response errors for upstream service calls. These errors are generated by the
![All about ISTIO-PROXY 5xx Issues](https://cdn-ak-scissors.b.st-hatena.com/image/square/b4cac766505e375e6d63c00a2ebd80db4c94161d/height=288;version=1;width=512/https%3A%2F%2Fmiro.medium.com%2Fv2%2Fresize%3Afill%3A1200%3A632%2Fg%3Afp%3A0.31%3A0.51%2F1%2AUXrs5ZVvKjKD7MNz0776Mg.png)