Index: src/main/java/org/apache/karaf/webconsole/JaasSecurityProvider.java
===================================================================
--- src/main/java/org/apache/karaf/webconsole/JaasSecurityProvider.java	(revision 963620)
+++ src/main/java/org/apache/karaf/webconsole/JaasSecurityProvider.java	(working copy)
@@ -17,18 +17,26 @@
 package org.apache.karaf.webconsole;
 
 import java.io.IOException;
+import java.security.GeneralSecurityException;
+
 import javax.security.auth.Subject;
 import javax.security.auth.callback.Callback;
 import javax.security.auth.callback.CallbackHandler;
 import javax.security.auth.callback.NameCallback;
 import javax.security.auth.callback.PasswordCallback;
 import javax.security.auth.callback.UnsupportedCallbackException;
+import javax.security.auth.login.AccountException;
+import javax.security.auth.login.FailedLoginException;
 import javax.security.auth.login.LoginContext;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 import org.apache.felix.webconsole.WebConsoleSecurityProvider;
 
 public class JaasSecurityProvider implements WebConsoleSecurityProvider {
 
+	private static final Log LOG = LogFactory.getLog(WebConsoleSecurityProvider.class);
+    
     private String realm;
 
     public String getRealm() {
@@ -57,9 +65,16 @@
             });
             loginContext.login();
             return subject;
-        } catch (Exception e) {
+        } catch (FailedLoginException e) {
+        	LOG.debug("Login failed", e);
             return null;
-        }
+        } catch (AccountException e) {
+        	LOG.warn("Account failure", e);
+        	return null;
+		} catch (GeneralSecurityException e) {
+			LOG.error("General Security Exception", e);
+			return null;
+		}
     }
 
     public boolean authorize(Object o, String s) {
Index: pom.xml
===================================================================
--- pom.xml	(revision 963620)
+++ pom.xml	(working copy)
@@ -47,6 +47,11 @@
           <artifactId>org.apache.felix.webconsole</artifactId>
           <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>commons-logging</groupId>
+            <artifactId>commons-logging</artifactId>
+            <scope>provided</scope>
+        </dependency>
     </dependencies>
 
     <build>