JON agent unable to load plug-in due to plug-in being corrupted

Solution Verified - Updated -


  • Agent failing to load plugin
  • Agent is running but does not discover any resource on platform
  • Agent unable to read plugin manifest
  • JON agent logs contain error similar to:
    ERROR [main] (rhq.core.pc.plugin.PluginManager)- Plugin [JBossAS5] at [file:/rhq-agent/plugins/jopr-jboss-as-5-plugin-3.0.0.GA.jar] could not be loaded and will therefore not be deployed.
    org.rhq.core.clientapi.descriptor.PluginTransformException: No version is defined for plugin jar [file:/rhq-agent/plugins/jopr-jboss-as-5-plugin-3.0.0.GA.jar]. A version must be defined either via the MANIFEST.MF 'Implementation-Version' attribute or via the plugin descriptor 'version' attribute.
         at org.rhq.core.clientapi.descriptor.PluginTransformer.getVersion(
         at org.rhq.core.clientapi.descriptor.PluginTransformer.toPlugin(
         at org.rhq.core.pc.plugin.PluginManager$1.execute(
         at org.rhq.core.pc.plugin.PluginManager.loadPlugin(
         at org.rhq.core.pc.plugin.PluginManager.initialize(
         at org.rhq.core.pc.PluginContainer.startContainerService(
         at org.rhq.core.pc.PluginContainer.initialize(
         at org.rhq.enterprise.agent.AgentMain.startPluginContainer(
         at org.rhq.enterprise.agent.AgentMain.start(
         at org.rhq.enterprise.agent.AgentMain.main(


  • JBoss Operations Network (JON)
    • 2.4.x
    • 3.0.x
    • 3.1.x

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In