goooogs opened a new issue #6709: URL: https://github.com/apache/skywalking/issues/6709
Please answer these questions before submitting your issue. - Why do you submit this issue? - [x] Question or discussion - [ ] Bug - [ ] Requirement - [x] Feature or performance improvement ___ ### Question - What do you want to know? As the image shows below, when I access the **`APM`** or **`SelfObservability`** page, it always got some faild request (1, 2, or 3) with **`503`** status code, and the sequence of failed request is unpredictable. I looked at the istio-ingressgateway log, it says that: `POST /graphql HTTP/2" 503 URX`, and the `URX` means that the request was rejected because the upstream retry limit (HTTP) or maximum connect attempts (TCP) was reached (see [here](https://www.envoyproxy.io/docs/envoy/latest/configuration/observability/access_log/usage#format-rules)) I tried to call the request manualy by `curl`, it's fine. I have no limitation on my k8s cluster and istio. Is it the limit by graphql? <img width="1049" alt="img1" src="https://user-images.githubusercontent.com/8554557/113961978-778a5d80-9859-11eb-8de1-c12099a3bb31.png";> ___ ### Bug - Which version of SkyWalking, OS, and JRE? * `docker image`: apache/skywalking-oap-server:8.4.0-es6 * `OS`: CentOS Linux release 7.7.1908 (Core) * `k8s`: - Client Version: version.Info{Major:"1", Minor:"18+", GitVersion:"v1.18.8-aliyun.1" - Server Version: version.Info{Major:"1", Minor:"18+", GitVersion:"v1.18.8-aliyun.1" * `istio`: 1.8.0 - Which company or project? - What happened? If possible, provide a way to reproduce the error. e.g. demo application, component version. ___ ### Requirement or improvement - Please describe your requirements or improvement suggestions. eliminate the failed request with status code of 503. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
![https://user-images.githubusercontent.com/8554557/113961978-778a5d80-9859-11eb-8de1-c12099a3bb31.png"](https://user-images.githubusercontent.com/8554557/113961978-778a5d80-9859-11eb-8de1-c12099a3bb31.png"){kind=link}