ADDITIONAL SYSTEM INFORMATION :
Ubuntu 16.04.6 LTS
CPU model: Intel(R) Xeon(R) CPU E5-4610 v4 @ 1.80GHz
Number of CPU cores: 4CPUs, each has 10 cores
Size of physical memory: 16384 MB * 20
Inside Linux container? No

A DESCRIPTION OF THE PROBLEM :
When executing the code ClassLoader.getResources("META-INF/MANIFEST.MF"):
J9 (8u232) can find several URLs:
"jar:file:/home/JVMs/j9-8u232-b09/jre/lib/rt.jar!/META-INF/MANIFEST.MF
jar:file:/home/JVMs/j9-8u232-b09/jre/lib/resources.jar!/META-INF/MANIFEST.MF
jar:file:/home/JVMs/j9-8u232-b09/jre/lib/jsse.jar!/META-INF/MANIFEST.MF
jar:file:/home/JVMs/j9-8u232-b09/jre/lib/charsets.jar!/META-INF/MANIFEST.MF
jar:file:/home/JVMs/j9-8u232-b09/jre/lib/jce.jar!/META-INF/MANIFEST.MF"
But even though those jar files and MF files exist in the path $OpenJDK8u232Path/jre/lib/, OpenJDK8u232 returns nothing.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Create a new file "test2.java", copy the source code into it.
2. Compile the java file "test2.java".
3. Run the command "java test2".

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
print:
"jar:file:$OpenJDK8u232Path/jre/lib/rt.jar!/META-INF/MANIFEST.MF
jar:file:$OpenJDK8u232Path/jre/lib/resources.jar!/META-INF/MANIFEST.MF
jar:file:$OpenJDK8u232Path/jre/lib/jsse.jar!/META-INF/MANIFEST.MF
jar:file:$OpenJDK8u232Path/jre/lib/charsets.jar!/META-INF/MANIFEST.MF
jar:file:$OpenJDK8u232Path/jre/lib/jce.jar!/META-INF/MANIFEST.MF"
ACTUAL -
print nothing

---------- BEGIN SOURCE ----------
import java.net.URL;
import java.util.Enumeration;

public class test2{
    public static void main(String[] args) {
        try {
            // AppClassLoader
            ClassLoader cl = Class.forName("test2").getClassLoader();
            Enumeration<URL> e = cl.getResources("META-INF/MANIFEST.MF");
            while(e.hasMoreElements()){
                System.out.println(e.nextElement().toString());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
---------- END SOURCE ----------

FREQUENCY : always