After the upgrade to 14.4 version, the role definition xml is not working , The task is stuck for a very long time and then the session gets terminated.
Release : 14.4
Role Definition xml was getting stuck.
Enable debugging of IM ims.jdbc to see which query is getting stuck.
Remove unchanged entries from xml to make it smaller and this should allow import to work.
You can check size of max-post-size and change as mentioned here.