SonarQube: Fail to get bootstrap index from server: Status returned by url [http://hostname:9095/sonar/batch/index] is not valid: [403]

Question

I am trying to execute following maven command from jenkins job, mvn clean install sonar:sonar -Dsonar.host.url=http://hostname:9095/sonar -Dsonar.projectKey=mavensam

Answer 1

I've recently had a very similar problem For me the resolution is to do with the proxy settings, if you don't have a proxy then skip this answer.

My command

mvn clean sonar:sonar -Dsonar.host.url=http://192.168.56.101:9000 -Dsonar.login=admin -Dsonar.password=admin

[INFO] --- sonar-maven-plugin:3.7.0.1746:sonar (default-cli) @ baselineV001-parent ---
[INFO] User cache: /home/developer/.sonar/cache
[ERROR] SonarQube server [http://192.168.56.101:9000] can not be reached
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for baselineV001-parent 1.0.0-SNAPSHOT:

... skipping some info lines for brevity (its a big project)

[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.sonarsource.scanner.maven:sonar-maven-plugin:3.7.0.1746:sonar (default-cli) on project baselineV001-parent: Unable to execute SonarQube: Fail to get bootstrap index from server: Status returned by url [http://192.168.56.101:9000/batch/index] is not valid: [503] -> [Help 1]

The key part of the log being http://192.168.56.101:9000/batch/index is not valid. I can curl this url and it works.

After a little thinking about what is different from curl, I have a proxy set in maven settings ~/.m2/settings.xml but I dont have one set for curl.

To check if proxy is the issue I removed the proxy entry in my settings.xml and then I saw it working and communicating with my sonarqube server

So if you have a proxy, you probably want to specify your sonarqube server as a host in the field nonProxyHosts in ~/.m2/settings.xml

  
    
      intranet-proxy
      true
      http
      
      
      proxy.intra.redacted.com
      8080
      localhost|192.168.56.101
    
  

Also a small point about advising people to use v3.2. It might be a fix, but it shouldn't be the long term answer as v3.2 is currently 3 years old (4 years old come September 2020). I've seen in other threads the sonarsource support team says give us more information about this problem, but on a newer version of sonar-maven-plugin.

Edit 1: Forgot to say that I could not find a change in the v3.3.0.603 of sonar-maven-plugin at https://github.com/SonarSource/sonar-scanner-maven, but it seems that versions 3.3.0.603 to current (3.7.0.1746) and probably future versions pay attention to the maven settings for proxies. You could argue it was a bug in previous versions that they didn't honor maven's proxy settings. Edit 2: typo