Index: log4j-core/src/main/java/org/apache/logging/log4j/core/config/composite/CompositeConfiguration.java
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- log4j-core/src/main/java/org/apache/logging/log4j/core/config/composite/CompositeConfiguration.java	(revision 5df95c91d7a034c67aa019c1c7652550996dc73d)
+++ log4j-core/src/main/java/org/apache/logging/log4j/core/config/composite/CompositeConfiguration.java	(revision )
@@ -155,15 +155,18 @@
                 LOGGER.warn("Unable to determine URI for configuration {}, changes to it will be ignored",
                         config.getName());
             } else {
-                currentConfig = factory.getConfiguration(getLoggerContext(), config.getName(), sourceURI);
+                if (currentConfig instanceof Reconfigurable) {
+                    currentConfig = ((Reconfigurable) currentConfig).reconfigure();
+                } else {
+                    currentConfig = factory.getConfiguration(getLoggerContext(), currentConfig.getName(), sourceURI);
+                }
                 if (currentConfig == null) {
                     LOGGER.warn("Unable to reload configuration {}, changes to it will be ignored", config.getName());
+                    return null;
                 }
             }
             configs.add((AbstractConfiguration) currentConfig);
-
         }
-
         return new CompositeConfiguration(configs);
     }