--- a/src/luan/modules/logging/Log4j.java	Wed May 29 19:03:25 2019 -0600
+++ b/src/luan/modules/logging/Log4j.java	Wed Jun 12 22:16:10 2019 -0600
@@ -1,6 +1,8 @@
 package luan.modules.logging;
 
 import java.util.Enumeration;
+import java.util.List;
+import java.util.ArrayList;
 import org.apache.log4j.Logger;
 import org.apache.log4j.LogManager;
 import org.apache.log4j.Hierarchy;
@@ -50,4 +52,18 @@
 	public static Logger getLogger(Luan luan,String name) {
 		return getLoggerRepository(luan).getLogger(name);
 	}
+
+	// because logger.removeAllAppenders() closes the appenders
+	public static void removeAllAppenders(Logger logger) {
+		List<Appender> list = new ArrayList<Appender>();
+		for( Enumeration en = logger.getAllAppenders(); en.hasMoreElements(); ) {
+			Appender appender = (Appender)en.nextElement();
+			list.add(appender);
+		}
+		for( Appender appender : list ) {
+			logger.removeAppender(appender);
+		}
+		if( logger.getAllAppenders().hasMoreElements() )
+			throw new RuntimeException();
+	}
 }