--- webtools.servertools/plugins/org.eclipse.wst.server.preview/src/org/eclipse/wst/server/preview/internal/ContextResourceHandler.java.orig	2016-08-03 10:49:27.944422583 +0100
+++ webtools.servertools/plugins/org.eclipse.wst.server.preview/src/org/eclipse/wst/server/preview/internal/ContextResourceHandler.java	2016-08-03 10:50:44.104487705 +0100
@@ -25,6 +25,10 @@
 			return null;
 		
 		path = path.substring(context.length());
-		return super.getResource(path);
+		try {
+			return super.getResource(path);
+		} catch(java.net.MalformedURLException e) {
+			return null;
+		}
 	}
 }