Mysql error: thd=(nil) Attempting backtrace

Hello,

I have centos server with WHM/cpanel installed on it.

currently i am not able to start mysql server and in mysql logs I see following error message
======================================================
thd=(nil)
Attempting backtrace. You can use the following information to find out
where mysqld died. If you see no messages after this, something went
terribly wrong...
frame pointer is NULL, did you compile with
-fomit-frame-pointer? Aborting backtrace!
The manual page at MySQL :: MySQL 5.5 Reference Manual :: C.5.4.2 What to Do If MySQL Keeps Crashing contains
information that should help you find out what is causing the crash.
100525 10:27:00 mysqld ended
========================================================

Can anyone suggest how to get it working.

its_joe