diff --git a/nuxeo-jsf/nuxeo-platform-webapp-base/src/main/java/org/nuxeo/ecm/webapp/security/UserSuggestionActionsBean.java b/nuxeo-jsf/nuxeo-platform-webapp-base/src/main/java/org/nuxeo/ecm/webapp/security/UserSuggestionActionsBean.java
index f111530..87f509f 100644
--- a/nuxeo-jsf/nuxeo-platform-webapp-base/src/main/java/org/nuxeo/ecm/webapp/security/UserSuggestionActionsBean.java
+++ b/nuxeo-jsf/nuxeo-platform-webapp-base/src/main/java/org/nuxeo/ecm/webapp/security/UserSuggestionActionsBean.java
@@ -240,6 +240,7 @@ public class UserSuggestionActionsBean implements Serializable {
 
     // XXX: needs optimisation
     public Map<String, Object> getPrefixedUserInfo(String id) throws ClientException {
+        log.error("Call getPrefixedUserInfoFor " + id);
         Map<String, Object> res = new HashMap<String, Object>();
         res.put(PREFIXED_ID_KEY_NAME, id);
         if (!StringUtils.isBlank(id)) {
@@ -262,6 +263,7 @@ public class UserSuggestionActionsBean implements Serializable {
 
     // XXX: needs optimisation
     public Map<String, Object> getUserInfo(String id) throws ClientException {
+        log.error("Call getUserInfoFor " + id);
         Map<String, Object> res = new HashMap<String, Object>();
         res.put(ID_KEY_NAME, id);
         if (userManager.getGroup(id) != null) {
diff --git a/nuxeo-services/nuxeo-platform-usermanager-core/src/main/java/org/nuxeo/ecm/platform/usermanager/UserManagerImpl.java b/nuxeo-services/nuxeo-platform-usermanager-core/src/main/java/org/nuxeo/ecm/platform/usermanager/UserManagerImpl.java
index acec582..5b9a0c0 100644
--- a/nuxeo-services/nuxeo-platform-usermanager-core/src/main/java/org/nuxeo/ecm/platform/usermanager/UserManagerImpl.java
+++ b/nuxeo-services/nuxeo-platform-usermanager-core/src/main/java/org/nuxeo/ecm/platform/usermanager/UserManagerImpl.java
@@ -538,6 +538,7 @@ public class UserManagerImpl implements UserManager, MultiTenantUserManager {
 
     @Override
     public NuxeoPrincipal getPrincipal(String username) throws ClientException {
+        log.error("Call getPrincipal for " + username);
         NuxeoPrincipal principal = null;
         try {
             if (useCache()) {
@@ -568,6 +569,7 @@ public class UserManagerImpl implements UserManager, MultiTenantUserManager {
 
     @Override
     public NuxeoGroup getGroup(String groupName) throws ClientException {
+        log.error("Call getGroup for " + groupName);
         return getGroup(groupName, null);
     }
 
@@ -1184,6 +1186,7 @@ public class UserManagerImpl implements UserManager, MultiTenantUserManager {
 
     @Override
     public DocumentModel getGroupModel(String groupIdValue, DocumentModel context) throws ClientException {
+        log.error("Get group model for " + groupIdValue);
         String groupName = multiTenantManagement.groupnameTranformer(this, groupIdValue, context);
         Session groupDir = null;
         if (groupName != null) {
@@ -1201,6 +1204,7 @@ public class UserManagerImpl implements UserManager, MultiTenantUserManager {
 
     @Override
     public DocumentModel getUserModel(String userName, DocumentModel context) throws ClientException {
+        log.error("Get user model for " + userName);
         if (userName == null) {
             return null;
         }