서버에 이상이 있는것 같습니다. 도와주세요..

증상
[ps -ef 중 아파치 관련]

nobody   29386  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29388  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29390  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29393  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29395  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29396  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29399  2990  0 17:57 ?        00:00:00 [httpd <defunct>]
nobody   29400  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29408  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29409  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29412  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29424  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29426  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29427  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29432  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29494  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29505  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29507  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd
nobody   29509  2990  0 17:57 ?        00:00:00 /usr/local/apache/bin/httpd

Zombie Process 같은 [httpd <defunct>] 생겼는데. 없어지지가 않습니다.