Index: lams_central/src/java/org/lamsfoundation/lams/webservice/SPEnrolmentServlet.java
===================================================================
diff -u -r7458588a3946b6e57836e2da89588c579aa4434c -rd3e92c2e32eabb05116f035967e2d13ec96fed46
--- lams_central/src/java/org/lamsfoundation/lams/webservice/SPEnrolmentServlet.java	(.../SPEnrolmentServlet.java)	(revision 7458588a3946b6e57836e2da89588c579aa4434c)
+++ lams_central/src/java/org/lamsfoundation/lams/webservice/SPEnrolmentServlet.java	(.../SPEnrolmentServlet.java)	(revision d3e92c2e32eabb05116f035967e2d13ec96fed46)
@@ -464,14 +464,21 @@
 		    logger.info("Processing " + role + " role finished");
 		}
 
+		try {
+		    HibernateSessionManager.closeSession();
+		    HibernateSessionManager.openSession();
+		} catch (Exception e) {
+		    logger.warn("Error while recreating Hibernate session", e);
+		}
+
 		logger.info("Disabling users");
 		// users who are part of courses but are not in the file anymore are eligible for disabling
 		allExistingUsersFromParsedCourses.removeAll(allParsedUsers);
 		for (User user : allExistingUsersFromParsedCourses) {
 		    boolean hasAnyRoles = userManagementService.hasUserAnyRoles(user.getUserId());
 		    if (!hasAnyRoles) {
 			// he is only a learner or this is staff mode, so disable
-			userManagementService.disableUser(user.getUserId());
+			userManagementService.disableUser(user.getUserId(), true);
 
 			String message = "User \"" + user.getLogin().toLowerCase() + "\" disabled";
 			logger.info(message);
Index: lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/IUserManagementService.java
===================================================================
diff -u -rf6a638aaf02124adf0a3a519440b3b31496937ae -rd3e92c2e32eabb05116f035967e2d13ec96fed46
--- lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/IUserManagementService.java	(.../IUserManagementService.java)	(revision f6a638aaf02124adf0a3a519440b3b31496937ae)
+++ lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/IUserManagementService.java	(.../IUserManagementService.java)	(revision d3e92c2e32eabb05116f035967e2d13ec96fed46)
@@ -330,12 +330,16 @@
 
     /**
      * Sets user's disabled flag to true, and removes their organisation memberships.
-     *
-     * @param userId
      */
     void disableUser(Integer userId);
 
     /**
+     * Sets user's disabled flag to true, and removes their organisation memberships.
+     * Skip log for batch processing.
+     */
+    void disableUser(Integer userId, boolean skipLog);
+
+    /**
      * Set the roles for the specified user and organisation using the roleIds in rolesList. If userOrganisation exists,
      * will also remove roles that are not in rolesList.
      *
Index: lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/UserManagementService.java
===================================================================
diff -u -r2de8f805211b6433aff4efd6fa9275a1b9933033 -rd3e92c2e32eabb05116f035967e2d13ec96fed46
--- lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/UserManagementService.java	(.../UserManagementService.java)	(revision 2de8f805211b6433aff4efd6fa9275a1b9933033)
+++ lams_common/src/java/org/lamsfoundation/lams/usermanagement/service/UserManagementService.java	(.../UserManagementService.java)	(revision d3e92c2e32eabb05116f035967e2d13ec96fed46)
@@ -691,9 +691,17 @@
 
     @Override
     public void disableUser(Integer userId) {
+	disableUser(userId, false);
+    }
+
+    @Override
+    public void disableUser(Integer userId, boolean skipLog) {
 	User user = (User) findById(User.class, userId);
+	if (user.getDisabledFlag()) {
+	    return;
+	}
 	user.setDisabledFlag(true);
-	log.debug("disabling user " + user.getLogin());
+	log.info("disabling user " + user.getLogin());
 	saveUser(user);
 
 	Set uos = user.getUserOrganisations();
@@ -705,7 +713,9 @@
 	    iter.remove();
 	}
 
-	AuditLogFilter.log(AuditLogFilter.USER_DISABLE_ACTION, "user login: " + user.getLogin());
+	if (!skipLog) {
+	    AuditLogFilter.log(AuditLogFilter.USER_DISABLE_ACTION, "user login: " + user.getLogin());
+	}
     }
 
     @Override
@@ -1225,8 +1235,8 @@
 		modifiedPortraitInputStream.close();
 		is.close();
 		if (log.isDebugEnabled()) {
-		    log.debug(
-			    "Saved large portrait with uuid: " + node.getNodeId() + " and version: " + node.getVersion());
+		    log.debug("Saved large portrait with uuid: " + node.getNodeId() + " and version: "
+			    + node.getVersion());
 		}
 
 		//resize to the medium size
@@ -1251,8 +1261,8 @@
 		modifiedPortraitInputStream.close();
 		is.close();
 		if (log.isDebugEnabled()) {
-		    log.debug(
-			    "Saved small portrait with uuid: " + node.getNodeId() + " and version: " + node.getVersion());
+		    log.debug("Saved small portrait with uuid: " + node.getNodeId() + " and version: "
+			    + node.getVersion());
 		}
 		// delete old portrait file (we only want to keep the user's current portrait)
 		if (user.getPortraitUuid() != null) {