[jboss-jira] [JBoss JIRA] (JBRULES-3287) Registering a SystemEventListener for a change set scanner does work. Therefor it's not possible to detect exceptions during scanning.

Registering a SystemEventListener for a change set scanner does work. Therefor it's not possible to detect exceptions during scanning. -------------------------------------------------------------------------------------------------------------------------------------- Key: JBRULES-3287 URL: https://issues.jboss.org/browse/JBRULES-3287 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Reporter: Geoffrey De Smet Assignee: Mark Proctor Attachments: JBRULES-3287.patch I wrote a FailureDetectingSystemEventListener to retain the exceptions throw in the scanner, so I can fail my testcase if there are any exception is the off-threads of a testcase that should fail the test case (but currently don't). {code} FailureDetectingSystemEventListener systemEventListener = new FailureDetectingSystemEventListener(); SystemEventListenerFactory.setSystemEventListener(systemEventListener); {code} However, when I tried registering this on the agent: {code} KnowledgeAgent kagent = KnowledgeAgentFactory.newKnowledgeAgent("csv agent"); kagent.setSystemEventListener(systemEventListener); {code} It didn't work, the DoNothingSEL was still used. When I tried on the SystemEventListenerFactory: {code} SystemEventListenerFactory.setSystemEventListener(systemEventListener); {code} a StackOverflowException occurs, because ProcessChangeSet.listener is a DelegatingSEL pointing to itself.