gmapping hangs ubuntu

edit

Hi guys,

In a freshly rebooted ubuntu 14.04 and ROS Indigo if I launch gmapping and after that I try to run "rostopic echo /map" or "rosservice call /dynamic_map" the system hangs completely. But saving the map through map_saver works fine.

Anyone knows why this is happening?

thanks

edit: By using rostopic or rosservice to subscribe or call map this will end up in out of memory for some reason.