diff --git a/gerrit-httpd/src/main/java/com/google/gerrit/httpd/auth/ldap/UserPassAuthServiceImpl.java b/gerrit-httpd/src/main/java/com/google/gerrit/httpd/auth/ldap/UserPassAuthServiceImpl.java
index bf49eece74..348ecbb9b2 100644
--- a/gerrit-httpd/src/main/java/com/google/gerrit/httpd/auth/ldap/UserPassAuthServiceImpl.java
+++ b/gerrit-httpd/src/main/java/com/google/gerrit/httpd/auth/ldap/UserPassAuthServiceImpl.java
@@ -30,11 +30,17 @@ import com.google.gwtjsonrpc.common.AsyncCallback;
 import com.google.inject.Inject;
 import com.google.inject.Provider;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 class UserPassAuthServiceImpl implements UserPassAuthService {
   private final Provider<WebSession> webSession;
   private final AccountManager accountManager;
   private final AuthType authType;
 
+  private static final Logger log = LoggerFactory
+      .getLogger(UserPassAuthServiceImpl.class);
+
   @Inject
   UserPassAuthServiceImpl(final Provider<WebSession> webSession,
       final AccountManager accountManager, final AuthConfig authConfig) {
@@ -73,6 +79,7 @@ class UserPassAuthServiceImpl implements UserPassAuthService {
       callback.onSuccess(result);
       return;
     } catch (AccountException e) {
+      log.info(String.format("'%s' failed to sign in: %s", username, e.getMessage()));
       result.setError(LoginResult.Error.INVALID_LOGIN);
       callback.onSuccess(result);
       return;