Custom deployment error "Require-Capability: osgi.ee=JavaSE"

Note: please note that Liferay has renamed its Liferay Experience Could offerings to Liferay SaaS (formerly LXC) and Liferay PaaS (formerly LXC-SM).

Issue

• Cannot deploy a custom module due to the following error:

• ERROR [fileinstall-directory-watcher][DirectoryWatcher:1141] Unable to start bundle: file:/opt/liferay/osgi/modules/com.liferay.custom.bundle.jar
  org.osgi.framework.BundleException: Could not resolve module: com.liferay.custom.bundle [1822]_ Unresolved requirement: Require-Capability: osgi.ee; filter:="(&(osgi.ee=JavaSE)(version=12))"_ 

Environment

• Liferay DXP 7.0, 7.1, 7.2, 7.3, 7.4

Resolution

• The module is compiled with a higher supported JDK version and cannot be activated in OSGi.
• You can either compile with the correct JDK version, or force to the source/target compile compatibility, in the project build.gradle:

• subprojects {
    plugins.withType(JavaPlugin) {
      compileJava   {
        sourceCompatibility = '1.8'
        targetCompatibility = '1.8'
      }
    }
  }

Additional Information

• Liferay PaaS article - Custom OSGi modules deployment issue