rhel7: Xorg process aborts with system shutdown

Issue

Xorg process aborts with system shutdown. backtrace:

(gdb) bt
#0  0x00007f8095e525f7 in raise () from debug/lib64/libc.so.6
#1  0x00007f8095e53ce8 in abort () from debug/lib64/libc.so.6
#2  0x00007f809860893e in OsAbort () at utils.c:1342
#3  0x00007f809860f287 in FatalError (f=f@entry=0x7f8098620c84 "%s: VT_ACTIVATE failed: %s\n") at log.c:948
#4  0x00007f809850ea09 in switch_to (vt=1, from=from@entry=0x7f8098620d0d "xf86CloseConsole") at lnx_init.c:72
#5  0x00007f809850f353 in xf86CloseConsole () at lnx_init.c:324
#6  0x00007f80984eaecd in ddxGiveUp (error=error@entry=EXIT_ERR_ABORT) at xf86Init.c:1068
#7  0x00007f80984eaf96 in AbortDDX (error=error@entry=EXIT_ERR_ABORT) at xf86Init.c:1121
#8  0x00007f809860e452 in AbortServer () at log.c:804
#9  0x00007f809860f2bd in FatalError (f=f@entry=0x7f8098620c84 "%s: VT_ACTIVATE failed: %s\n") at log.c:945
#10 0x00007f809850ea09 in switch_to (vt=1, from=from@entry=0x7f8098620d0d "xf86CloseConsole") at lnx_init.c:72
#11 0x00007f809850f353 in xf86CloseConsole () at lnx_init.c:324
#12 0x00007f80984eaecd in ddxGiveUp (error=error@entry=EXIT_NO_ERROR) at xf86Init.c:1068
#13 0x00007f80984ae404 in dix_main (argc=6, argv=0x7ffe6e8e6218, envp=<optimized out>) at main.c:378
#14 0x00007f8095e3eb15 in __libc_start_main () from debug/lib64/libc.so.6
#15 0x00007f80984986b1 in _start ()

Could you tell us the cause that Xorg process aborts with system shutdown?