From a97665da3e6ea498ebcdbb7fa21335e3f366da21 Mon Sep 17 00:00:00 2001
From: Jan Bartel <janb@webtide.com>
Date: Fri, 9 Sep 2016 10:09:22 +1000
Subject: [PATCH] Issue #913

---
 .../main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java  | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java
index 4256d2a954f..4a9a71bfc52 100644
--- a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java
+++ b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java
@@ -489,7 +489,8 @@ public class WebAppClassLoader extends URLClassLoader
 
             if (c == null && ex!=null)
             {
-                LOG.debug("!loadedClass({}) from={} tried_parent={}",name,this,tried_parent);
+                if (LOG.isDebugEnabled())
+                    LOG.debug("!loadedClass({}) from={} tried_parent={}",name,this,tried_parent);
                 throw ex;
             }