Problem

While attempting to run the atlas-run command from the Atlassian Plugin SDK, whether its for Cloud or Server:

atlas-run-cloud
atlas-run-standalone

the build fails to complete.

The following appears in the console/terminal:

[INFO] ------------------------------------------------------------------------ 
[INFO] BUILD FAILURE 
[INFO] ------------------------------------------------------------------------ 
[INFO] Total time: 1.384 s 
[INFO] Finished at: 2016-01-09T13:35:33+01:00 
[INFO] Final Memory: 9M/81M 
[INFO] ------------------------------------------------------------------------ 
[ERROR] Failed to execute goal com.atlassian.maven.plugins:maven-amps-plugin:6.2.1:run-cloud (default-cli) on project standalone-pom: 
Execution default-cli of goal com.atlassian.maven.plugins:maven-amps-plugin:6.2.1:run-cloud failed: 
Unable to load the mojo 'run-cloud' in the plugin 'com.atlassian.maven.plugins:maven-amps-plugin:6.2.1' due to an API incompatibility: 
org.codehaus.plexus.component.repository.exception.ComponentLookupException: 
com/atlassian/maven/plugins/amps/RunCloudMojo : 
Unsupported major.minor version 52.0 

Specifically, the error is:

Unsupported major.minor version 52.0 

Diagnosis

Environment

• JAVA_HOME has been set to a JAVA version that is incompatible with the installed SDK version.

Diagnostic Steps

• To check for the JAVA installation that the Plugin SDK uses, run atlas-version:

  $ atlas-version
  ATLAS Version: 6.2.2 
  ATLAS Home: /Applications/Atlassian/atlassian-plugin-sdk-6.2.2 
  ATLAS Scripts: /Applications/Atlassian/atlassian-plugin-sdk-6.2.2/bin 
  ATLAS Maven Home: /Applications/Atlassian/atlassian-plugin-sdk-6.2.2/apache-maven-3.2.1 
  AMPS Version: 6.2.1 
  -------- 
  Executing: /Applications/Atlassian/atlassian-plugin-sdk-6.2.2/apache-maven-3.2.1/bin/mvn --version -gs /Applications/Atlassian/atlassian-plugin-sdk-6.2.2/apache-maven-3.2.1/conf/settings.xml 
  Apache Maven 3.2.1 (ea8b2b07643dbb1b84b6d16e1f08391b666bc1e9; 2014-02-14T18:37:52+01:00) 
  Maven home: /Applications/Atlassian/atlassian-plugin-sdk-6.2.2/apache-maven-3.2.1 
  Java version: 1.6.0_65, vendor: Apple Inc. 
  Java home: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home 
  Default locale: de_DE, platform encoding: MacRoman 
  OS name: "mac os x", version: "10.9.5", arch: "x86_64", family: "mac"

  Specifically, refer to the Java home: text above.

Cause

JAVA_HOME has been set to a JAVA version that is incompatible with the installed SDK version, as the SDK by default uses the JAVA installation specified by the system's JAVA_HOME environment variable.

Resolution

Upgrade the system's JAVA installation to a newer version, or point JAVA_HOME to a newer version of JAVA.

As of time of writing, the latest SDK Version 6.2.2 requires JAVA 1.8 or higher.

You can also refer to this article for information on required JDK versions: https://developer.atlassian.com/display/DOCS/Set+up+the+SDK+Prerequisites+for+Linux+or+Mac