[xwiki-users] Session is closed

Hi, I have a problem when I trigger two ajax requests together(in the same time). In the First request, I do a getDocument and then a getObject. In the second one i have a loop and for each iteration a getDocument and a getObject. This is the exception I get Error number 3212 in 3: Exception while loading object {0} of class {1} and number {2} Wrapped Exception: Session is closed! Have you any idea on how to fix the problem Thanks !