.../core/config/plugins/util/ResolverUtil.java     | 24 +++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/log4j-core/src/main/java/org/apache/logging/log4j/core/config/plugins/util/ResolverUtil.java b/log4j-core/src/main/java/org/apache/logging/log4j/core/config/plugins/util/ResolverUtil.java
index 6d9178c..370291e 100644
--- a/log4j-core/src/main/java/org/apache/logging/log4j/core/config/plugins/util/ResolverUtil.java
+++ b/log4j-core/src/main/java/org/apache/logging/log4j/core/config/plugins/util/ResolverUtil.java
@@ -20,6 +20,7 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
+import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
 import java.net.URI;
 import java.net.URISyntaxException;
@@ -202,10 +203,27 @@ public class ResolverUtil {
                     final String containerPath = urlPath.substring(1,
                                                   urlPath.length() - packageName.length() - 2);
                     final File containerFile = new File(containerPath);
-                    if (containerFile.isDirectory()) {
-                        loadImplementationsInDirectory(test, packageName, new File(containerFile, packageName));
+                    if (containerFile.exists()) {
+                        if (containerFile.isDirectory()) {
+                            loadImplementationsInDirectory(test, packageName, new File(containerFile, packageName));
+                        } else {
+                            loadImplementationsInJar(test, packageName, containerFile);
+                        }
                     } else {
-                        loadImplementationsInJar(test, packageName, containerFile);
+                        // fallback code for JBOSS, if the file couldn't be found
+                        // by loading the path as a file, try to read the jar as a stream
+                        final String path = urlPath.substring(0, urlPath.length() - packageName.length() - 2);
+                        final URL newURL = new URL(url.getProtocol(), url.getHost(), path);
+                        
+                        try (final InputStream is = newURL.openStream()){
+                            final JarInputStream jarStream; 
+                            if (is instanceof JarInputStream){
+                                jarStream = (JarInputStream) is;
+                            } else {
+                                jarStream = new JarInputStream(is);
+                            }
+                            loadImplementationsInJar(test, packageName, path, jarStream);
+                        }
                     }
                 } else if (BUNDLE_RESOURCE.equals(url.getProtocol())) {
                     loadImplementationsInBundle(test, packageName);