Unsupported major.minor version Exception for sonar-scanner

java sonarqube sonar-runner
Amrish picture Amrish · Sep 24, 2016 · Viewed 11.4k times · Source

I am trying to analyze my source code using SonarQube. I am trying to use sonar-scanner as my tool to run analysis from command line. I followed the guidelines presented in this documentation article: http://docs.sonarqube.org/display/SCAN/Analyzing+with+SonarQube+Scanner

When I try to test the installation by running sonar-scanner -h I am getting the following error:

➜  ~ sonar-scanner -h
Exception in thread "main" java.lang.UnsupportedClassVersionError: org/sonarsource/scanner/cli/Main : Unsupported major.minor version 52.0
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
    at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)

From the error it looks like its not finding the right version for JAVA/JRE to run the cli tool. My understanding was that the tool should work with any Java 1.7+ version. I am using Oracle JDK 1.7.0_55. I also tried using OpenJDK 1.8 but I am still getting the same error. I also checked my JAVA_HOME variable is set to the right JDK directory.

Any help in the right direction is appreciated.

Answer

Amrish picture Amrish · Sep 25, 2016

After Struggling with this for a while, I found the cause of the problem. The CLI is looking at your JAVA_HOME path variable to figure out the version of Java it needs to use. even tough the default java and javac commands were pointing to JDK 8, setting the JAVA_HOME environment variable to your JDK 8 root directory solved the issue.

Hope this helps other folks facing similar issue.

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