Puppetserver service fails to start with error (UnsupportedClassVersionError) at java.lang.ClassLoader/defineClass1 on Red Hat Satellite 6.

Solution Verified - Updated -

Issue

  • Puppetserver service fails to start on Red Hat Satellite with below error:

    Starting puppetserver Service 2025-02-21T09:50:07.548032+01:00 satellite.example.com puppetserver[1343108]: Execution error (UnsupportedClassVersionError) at java.lang.ClassLoader/defineClass1 (ClassLoader.java:-2).  2025-02-21T09:50:07.548032+01:00 satellite.example.com puppetserver[1343108]: com/puppetlabs/puppetserver/EnvironmentRegistry has been compiled by a more recent version of the Java Runtime 
(class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0

Environment

  • Red Hat Satellite 6.16
  • Red Hat Capsule 6.16

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