Reproducer reproduce.zip ├── modules │   └── test │   └── listener │   └── main │   ├── module.xml │   └── TestService.jar └── standalone └── configuration └── standalone-test.xml TestService.jar ├── test │   └── listener │   ├── TestListener.class │   └── TestListener.java └── test.txt test/listener/TestListener.java public class TestListener implements ProcessStateListener { public void init(ProcessStateListenerInitParameters parameters) { System .out.println( "-------------------- TestListener init start" ); System .out.println( "Find test.txt in ClassLoader 1 : " + Thread .currentThread().getContextClassLoader().getResource( "test.txt" )); System .out.println( "Find test.txt in ClassLoader 2 : " + ClassLoader .getSystemClassLoader().getResource( "test.txt" )); System .out.println( "-------------------- TestListener init end" ); } Steps to reproduce 1. Install JBoss EAP 7.3.x. 2. Unzip reproduce.zip under the EAP_HOME 3. Run the EAP 7.3 with standalone-test.xml. $ ./standalone.sh -c standalone-test.xml 4. Cannot find the test.txt which is in the TestService.jar root. 10:58:06,294 INFO [stdout] (ServerService Thread Pool -- 48) -------------------- TestListener init start 10:58:06,295 INFO [stdout] (ServerService Thread Pool -- 48) Find test.txt in ClassLoader 1 : null 10:58:06,295 INFO [stdout] (ServerService Thread Pool -- 48) Find test.txt in ClassLoader 2 : null 10:58:06,295 INFO [stdout] (ServerService Thread Pool -- 48) -------------------- TestListener init end