diff --git a/sapl/crud/base.py b/sapl/crud/base.py
index 788fd949a..e720b36cd 100644
--- a/sapl/crud/base.py
+++ b/sapl/crud/base.py
@@ -118,7 +118,8 @@ class SearchMixin(models.Model):
                     try:
                         search += str(getattr(self, str_field)) + ' '
                     except Exception as e:
-                        self.logger.error(str(e))
+                        username = self.request.user.username
+                        self.logger.error("user=" + username + ". " + str(e))
                         pass
                 else:
                     _self = self
@@ -556,7 +557,8 @@ class CrudListView(PermissionRequiredContainerCrudMixin, ListView):
                         try:
                             fm = model._meta.get_field(fo)
                         except Exception as e:
-                            self.logger.error(str(e))
+                            username = self.request.user.username
+                            self.logger.error("user=" + username + ". " + str(e))
                             pass
 
                         if fm and hasattr(fm, 'related_model')\
@@ -627,7 +629,8 @@ class CrudCreateView(PermissionRequiredContainerCrudMixin,
             self.object.owner = self.request.user
             self.object.modifier = self.request.user
         except Exception as e:
-            self.logger.error(str(e))
+            username = self.request.user.username
+            self.logger.error("user=" + username + ". " + str(e))
             pass
 
         if self.container_field:
@@ -698,7 +701,8 @@ class CrudDetailView(PermissionRequiredContainerCrudMixin,
                     fieldname).related_model._meta.verbose_name_plural)
                 for fieldname in self.list_field_names_set]
         except Exception as e:
-            self.logger.error(tr(e))
+            username = self.request.user.username
+            self.logger.error("user=" + username + ". " + str(e))
             obj = self.crud if hasattr(self, 'crud') else self
             return [getattr(
                 self.object,
@@ -726,7 +730,8 @@ class CrudDetailView(PermissionRequiredContainerCrudMixin,
                 if i == 0 else None)
                 for i, name in enumerate(self.list_field_names_set)]
         except Exception as e:
-            self.logger.error(str(e))
+            username = self.request.user.username
+            self.logger.error("user=" + username + ". " + str(e))
             return [(
                 getattr(obj, name),
                 self.resolve_model_set_url(ACTION_DETAIL, args=(obj.id,))
@@ -742,7 +747,8 @@ class CrudDetailView(PermissionRequiredContainerCrudMixin,
         try:
             self.object = self.model.objects.get(pk=kwargs.get('pk'))
         except Exception as e:
-            self.logger.error(str(e))
+            username = request.user.username
+            self.logger.error("user=" + username + ". " + str(e))
             raise Http404
         obj = self.crud if hasattr(self, 'crud') else self
         if hasattr(obj, 'model_set') and obj.model_set:
@@ -823,7 +829,8 @@ class CrudUpdateView(PermissionRequiredContainerCrudMixin,
         try:
             self.object.modifier = self.request.user
         except Exception as e:
-            self.logger.error(str(e))
+            username = self.request.user.username
+            self.logger.error("user=" + username + ". " + str(e))
             pass
 
         return super().form_valid(form)
@@ -867,13 +874,20 @@ class CrudDeleteView(PermissionRequiredContainerCrudMixin,
             error_msg = 'Registro não pode ser removido, pois\
                          é referenciado por outros registros:<br>\
                          <ul>'
+            error_msg2 = ''
             for i in err.protected_objects:
                 error_msg += '<li>{} - {}</li>'.format(
                     i._meta.verbose_name, i
                 )
+                error_msg2 += '{} - {}, '.format(
+                    i._meta.verbose_name, i
+                )
+            error_msg2 = error_msg2[:len(error_msg2)-2] + '.'
             error_msg += '</ul>'
-            self.logger.error("Registro não pode ser removido, pois "
-                         "é referenciado por outros registros")
+            
+            username = request.user.username
+            self.logger.error("user=" + username + ". Registro não pode ser removido, pois "
+                         "é referenciado por outros registros: " + error_msg2)
             messages.add_message(request,
                                  messages.ERROR,
                                  error_msg)
@@ -1116,7 +1130,8 @@ class MasterDetailCrud(Crud):
             try:
                 parent_object = parent_model.objects.get(**params)
             except Exception as e:
-                self.logger.error(str(e))
+                username = self.request.user.username
+                self.logger.error("user=" + username + ". " + str(e))
                 raise Http404()
 
             context[
@@ -1182,7 +1197,8 @@ class MasterDetailCrud(Crud):
                 try:
                     parent_object = parent_model.objects.get(**params)
                 except Exception as e:
-                    self.logger.error(str(e))
+                    username = self.request.user.username
+                    self.logger.error("user=" + username + ". " + str(e))
                     raise Http404()
             else:
                 parent_model = self.model
diff --git a/sapl/sessao/views.py b/sapl/sessao/views.py
index 77c46ce10..3c1da0380 100755
--- a/sapl/sessao/views.py
+++ b/sapl/sessao/views.py
@@ -1582,7 +1582,7 @@ class ExpedienteView(FormMixin, DetailView):
 
                 msg = _('Registro salvo com sucesso')
                 messages.add_message(self.request, messages.SUCCESS, msg)
-                self.logger.info('user=' + username + '. ExpedienteSessao(sessao_plenaria_id={} e tipo_id{}) salvo com sucesso.'
+                self.logger.info('user=' + username + '. ExpedienteSessao(sessao_plenaria_id={} e tipo_id={}) salvo com sucesso.'
                                  .format(self.object.id, tipo))
 
             return self.form_valid(form)
diff --git a/sapl/settings.py b/sapl/settings.py
index 9261908a3..7e382fc4e 100755
--- a/sapl/settings.py
+++ b/sapl/settings.py
@@ -14,6 +14,7 @@ See https://docs.djangoproject.com/en/1.8/howto/deployment/checklist/
 
 """
 import socket
+import logging
 
 from decouple import config
 from dj_database_url import parse as db_url