How to resolve "HttpException: Error 413" (SonarQube)

I had the same error where my sonarqube server was behind an nginx proxy.

413 == Request entity too large as @jeroen-heier said.

I applied a change to my nginx configuration like this

server {
  ...
  client_max_body_size 20M;
  ....
}

to allow requests to be 20 megabytes, and that fixed it.

If you run sonar in docker , the default sonar image does not contain nginx server, so there're nothing can do in container

I ran it in k8s, there's a ingress before sonar service, so you should config the ingress and the service

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: sonarqube
  namespace: default
  annotations:
    ingress.kubernetes.io/proxy-body-size: "20M"
spec:
  rules:
...

To get this via the helm chart, add

ingress:
  enabled: true
  annotations:
    ingress.kubernetes.io/proxy-body-size: "20M"