Its actually freezing, nothing in the logs.
strace shows its stuck in a loop, with lots of rt_sigprocmask(SIG_BLOCK, [HUP INT USR1 USR2 ALRM CHLD IO], [HUP INT USR1 USR2 ALRM CHLD IO], 8) = 0 and futex action.
I found it "easy" to reproduce with dayz expansion + COT installed and clicking on the territories button.
Other players report its stuck when somebody joins and the expansion notification shows.