I am running CentOS 6.6 with Vivado and SDK, but SDK has been crashing like crazy on me. It dies with the following message.
java: cairo-misc.c:380: _cairo_operator_bounded_by_source: Assertion `NOT_REACHED' failed.
Turns out it is a problem with versioning between gtk2 and cairo. Here is a link with the details.
There are some posts on the Xilinx forum about installing updated RPMs to fix this, but it is not a good idea to install RPMs outside of the YUM framework. Another alternative is to disable cairo in eclipse. So edit your eclipse configuration file in install_dir/SDK/2014.4/eclipse/lnx64.o/configuration/config.ini (and the 32-bit version if that is appropriate) to include the following line.
This seems to have fixed things at least for now.