Sonar Setup Undefined Mandatory Properties

If you have a java project, you must create a sonar-project.properties file in the folder where you execute sonar runner. You must define the following properties inside this file:

# Required metadata
sonar.projectKey=java-sonar-runner-simple
sonar.projectName=Simple Java project analyzed with the SonarQube Runner
sonar.projectVersion=1.0

# Comma-separated paths to directories with sources (required)
sonar.sources=src

# Language
sonar.language=java

# Encoding of the source files
sonar.sourceEncoding=UTF-8

Hope this helps,