Running without the SUID sandbox!

Time to time cucember tests failed with 'Running without the SUID sandbox!'
Full Trace: http://pastebin.com/0dMCvQ5z
I need to rebuild several times until build will be successful. I didn’t set ‘SUID sandbox’ property manually or in configs. Using selenium as javascript_driver.
So just trying to understand whats wrong… Any suggestions will be appreciated.