Failed to execute goal org.sonarsource.scanner.maven:sonar-maven-plugin: 3.2:sonar

Question

Can anyone help me in getting solution for the below error.

Below are the version of the components to configure

1. SonarQube 5.1.2
2. Soanr-Runner 2.4
3. Java 1.7 [ I have to use 1.7 only since my code supports only 1.7]
4. mavn 3.3.9
5. sonar-cobertura-plugin-1.6.3
6. sonar-findbugs-plugin-3.3
7. cobertura 2.6

Execution command

mvn -fn -e org.sonarsource.scanner.maven:sonar-maven-plugin:RELEASE:sonar -Dsonar.jdbc.url="jdbc:mysql://localhost:3306/sonar?useUnicode=true&characterEncoding=utf8&rewriteBatchedStatements=true&useConfigs=maxPerformance" -Dsonar.host.url=http://localhost:9000 -DskipTests

In Console Window I am getting error

[ERROR] Failed to execute goal org.sonarsource.scanner.maven:sonar-maven-plugin:
3.2:sonar (default-cli) on project NWT_Core: Execution default-cli of goal org.s
onarsource.scanner.maven:sonar-maven-plugin:3.2:sonar failed: Unable to load the
 mojo 'sonar' in the plugin 'org.sonarsource.scanner.maven:sonar-maven-plugin:3.
2' due to an API incompatibility: org.codehaus.plexus.component.repository.excep
tion.ComponentLookupException: org/sonarsource/scanner/maven/SonarQubeMojo : Unsupported major.minor version 52.0 

Answer 1

Since the 3.2, the SonarQube maven plugin requires Java 8. You have to use the 3.0.2 version for Java 7.

You have to explicitely add this statement to your pom :

<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>sonar-maven-plugin</artifactId>
    <version>3.0.2</version>
</plugin>

Because if you do not do so, by default this plugin uses the LATEST version of the plugin (3.2), hence your error.

See http://docs.sonarqube.org/display/HOME/Frequently+Asked+Questions#FrequentlyAskedQuestions-ShouldIlockversionofSonarQubeMavenplugininmypom.xml?