After upgrade or new install of 10.5 Java agent with Browser Agent enabled the "Introscope Startup Class" fails to be invoked or initialized at startup and agent is not loaded. Symptoms reported for:
<BEA-000286> <Failed to invoke startup class "Introscope Startup Class", com.wily.introscope.agent.AgentNotAvailableException
at com.wily.introscope.api.weblogic.IntroscopeStartupClass.startup(IntroscopeStartupClass.java:70) ...
CustomService W WSVR0019W: CustomService, Introscope Custom Service, failed to initialize.
at com.wily.introscope.agent.AgentShim.IAgentShim_getAgent(AgentShim.java:696) ...
Problem specific to applications running Java 1.6 which is not supported in 10.5 (the BrowserAgentExt.jar is only Java 1.7+ compatible).
The agent support for JRE 1.6 is planned to be restored in the next release 10.5.2.
10.5.1 Hot Fix 6 is also now available to provide agent support for Java 1.6