--- a/src/org/eclipse/jetty/util/security/Credential.java	Fri Sep 09 17:10:47 2016 -0600
+++ b/src/org/eclipse/jetty/util/security/Credential.java	Tue Sep 13 23:13:06 2016 -0600
@@ -23,8 +23,8 @@
 
 import org.eclipse.jetty.util.StringUtil;
 import org.eclipse.jetty.util.TypeUtil;
-import org.eclipse.jetty.util.log.Log;
-import org.eclipse.jetty.util.log.Logger;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /* ------------------------------------------------------------ */
 /**
@@ -43,7 +43,7 @@
  */
 public abstract class Credential implements Serializable
 {
-    private static final Logger LOG = Log.getLogger(Credential.class);
+    private static final Logger LOG = LoggerFactory.getLogger(Credential.class);
 
     private static final long serialVersionUID = -7760551052768181572L;
 
@@ -186,7 +186,7 @@
             }
             catch (Exception e)
             {
-                LOG.warn(e);
+                LOG.warn("",e);
                 return false;
             }
         }
@@ -207,7 +207,7 @@
                         }
                         catch (Exception e)
                         {
-                            LOG.warn(e);
+                            LOG.warn("",e);
                             return null;
                         }
                     }
@@ -221,7 +221,7 @@
             }
             catch (Exception e)
             {
-                LOG.warn(e);
+                LOG.warn("",e);
                 return null;
             }
         }