Building SonarQube with maven and batch_boostrap/index cannot be found - maven

Question

I'm running mvn sonar:sonar in the directory of the project I'm running. I already have my pom.xml updated:
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>sonar-maven-plugin</artifactId>
<version>2.7.1</version>
</plugin>
After running sudo mvn sonar:sonar (I am on ubuntu 14.04) in my terminal, I get the following error:
eschwartz#LATITUDE:~/ideaprojects/xQueryEngine$ sudo mvn sonar:sonar
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building xQueryEngine (Solr 4 REX) 1.11.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- sonar-maven-plugin:2.7.1:sonar (default-cli) # xqe ---
[INFO] User cache: /root/.sonar/cache
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 2.854s
[INFO] Finished at: Wed Feb 17 15:56:59 EST 2016
[INFO] Final Memory: 17M/302M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:sonar-maven-plugin:2.7.1:sonar (default-cli) on project xqe: Fail to download libraries from server: Status returned by url : 'http://localhost:9000/batch_bootstrap/index' is invalid : 404 -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
Anyone know how to fix this?
Thanks.

Answer 1

You have to set sonar.host.url=http://localhost:9000/sonar. You can do this by passing -Dsonar.host.url=... to mvn, or ideally set it in your Maven Global/Project Settings so that you don't always have to pass it as a command line argument.
Details: if your dashboard is at localhost:9000/sonar then it means you're using sonar.web.context=/sonar , which is different from the default (/). So you need to tell the scanner where to find SonarQube.