find 명령 중에서...

리눅스 레드헷 7.2 를 사용하고 있고요..
아파치 httpd.conf파일 찾든 도중에 find명령을 사용해서..찾기 위해
[root@ihappycom www]# find / -name httpd.conf
find: /proc/22961/fd: No such file or directory
find: /proc/22964/fd: No such file or directory
find: /proc/22967/fd: No such file or directory
find: /proc/25813/fd: No such file or directory
find: /proc/25814/fd: No such file or directory
find: /proc/25815/fd: No such file or directory
find: /proc/25816/fd: No such file or directory
find: /proc/2493/fd: No such file or directory
find: /proc/3285/fd: No such file or directory
find: /proc/23311/fd: No such file or directory
find: /proc/3396/fd: No such file or directory
find: /proc/9198/fd: No such file or directory
find: /proc/14245/fd: No such file or directory
/etc/httpd/conf/httpd.conf
httpd.conf파일을 찾긴  찾는데...이상하게.../proc/22961/fd: No such file or directory이런
식의 디렉토리를 찾을 수 없다고..하는군요.
아시는 분 있으면...왜 이런지 ..답변 좀 부탁드립니다.
그럼 다들 수고하세요..