'UnsupportedClassVersionError- bad major version at offset=6' when Starting JIRA Applications Due to Java Version
Users are unable to start or configure JIRA (version 4.3 or later).
JAVA_HOME is not set to a Sun Java 1.6+ implementation of the JDK.
Ensure that you're running JDK version 1.6 (for JIRA until version 5.2) or JDK 1.7 (for later JIRA version greater than 5.2) . Check the JAVA_HOME declaration by running
java -version from the command line.