이유를 알수없는 아파치서버의 다운..

현재 환경 2k + 아파치 1.3.19 버젼으로 서버를 여러대 돌리는데요.
그런데 몇몇 서버가 자주 다운이 되고 말썽이라네요.
어떤때는 쿼리만 날려도 다운이 된다고합니다.
에러로그파일 문제있는것같은 일부분 첨부합니다.
로그 파일로 봐서는 특별히 무슨 문제가 있는것 같지는 않은데..^^:;;
프로그램 라이센스 문제로 서버를 밀수는 없다고하거든요.
제가 내일오전중으로 이 문제를 해결해야하거든요.^^;;
부탁드릴께요.

[Thu Dec 02 11:24:17 2004] [notice] Child 2964: Exit event signaled. Child process is ending.
[Thu Dec 02 11:24:17 2004] [notice] Parent: Created child process 4848
[Thu Dec 02 11:24:17 2004] [notice] Child 4848: Child process is running
[Thu Dec 02 11:24:18 2004] [notice] Child 4848: Acquired the start mutex.
[Thu Dec 02 11:24:18 2004] [notice] Child 2964: Released the start mutex
[Thu Dec 02 11:24:18 2004] [notice] Child 4848: Starting 250 worker threads.
[Thu Dec 02 11:24:19 2004] [notice] Child 2964: Waiting for 250 worker threads to exit.
[Thu Dec 02 11:24:19 2004] [notice] Child 2964: All worker threads have exited.
[Thu Dec 02 11:24:19 2004] [notice] Child 2964: Child process is exiting
[Thu Dec 02 11:25:10 2004] [notice] Parent: Received restart signal -- Restarting the server.
[Thu Dec 02 11:25:10 2004] [notice] Child 4848: Exit event signaled. Child process is ending.
[Thu Dec 02 11:25:10 2004] [notice] Parent: Created child process 5980
[Thu Dec 02 11:25:10 2004] [notice] Child 5980: Child process is running
[Thu Dec 02 11:25:11 2004] [notice] Child 4848: Released the start mutex
[Thu Dec 02 11:25:11 2004] [notice] Child 5980: Acquired the start mutex.
[Thu Dec 02 11:25:11 2004] [notice] Child 5980: Starting 250 worker threads.
[Thu Dec 02 11:25:12 2004] [notice] Child 4848: Waiting for 250 worker threads to exit.
[Thu Dec 02 11:25:12 2004] [notice] Child 4848: All worker threads have exited.
[Thu Dec 02 11:25:12 2004] [notice] Child 4848: Child process is exiting
[Thu Dec 02 11:26:42 2004] [error] [client 211.241.90.36] File does not exist: C:/Inetpub/eco/search_user/images/main_back.gif, referer: http://211.241.90.36/search_user/book_search/totalsearch_simple.php
[Thu Dec 02 11:26:47 2004] [error] [client 211.241.90.36] File does not exist: C:/Inetpub/eco/search_user/images/main_back.gif, referer: http://211.241.90.36/search_user/book_search/totalsearch_simple.php
[Thu Dec 02 11:32:38 2004] [notice] Parent: Received shutdown signal -- Shutting down the server.
[Thu Dec 02 11:32:38 2004] [notice] Child 3564: Exit event signaled. Child process is ending.
[Thu Dec 02 11:32:39 2004] [notice] Child 3564: Released the start mutex
[Thu Dec 02 11:32:40 2004] [notice] Child 3564: Waiting for 250 worker threads to exit.
[Thu Dec 02 11:32:40 2004] [notice] Child 3564: All worker threads have exited.
[Thu Dec 02 11:32:40 2004] [notice] Child 3564: Child process is exiting
[Thu Dec 02 11:32:40 2004] [notice] Parent: Child process exited successfully.
[Thu Dec 02 11:32:43 2004] [notice] Parent: Created child process 5580
[Thu Dec 02 11:32:43 2004] [notice] Child 5580: Child process is running
[Thu Dec 02 11:32:43 2004] [notice] Child 5580: Acquired the start mutex.
[Thu Dec 02 11:32:43 2004] [notice] Child 5580: Starting 250 worker threads.
[Thu Dec 02 11:38:48 2004] [error] [client 211.241.89.234] File does not exist: C:/Inetpub/eco/ecolas-dl/military/user/user/mylib/images, referer: http://211.241.90.36/ecolas-dl/military/user/user/mylib/folder_list.php
[Thu Dec 02 11:38:50 2004] [error] [client 211.241.89.234] File does not exist: C:/Inetpub/eco/ecolas-dl/military/user/user/hope/images, referer: http://211.241.90.36/ecolas-dl/military/user/user/hope/hope.php
[Thu Dec 02 11:38:50 2004] [error] [client 211.241.89.234] File does not exist: C:/Inetpub/eco/ecolas-dl/military/user/user/hope/images, referer: http://211.241.90.36/ecolas-dl/military/user/user/hope/hope.php
[Thu Dec 02 11:39:10 2004] [error] [client 211.241.89.234] File does not exist: C:/Inetpub/eco/ecolas-dl/user, referer: http://211.241.90.36/ecolas-dl/military/admin/hope/hope_list.php