My environment have two servers(RHEL5), one is DB server, and the other is web server. DB server is running Oracle 9i Web server is running Apache + Tomcat + mod_jk + Openssl The problem is happen on my web server, the number of httpd process will suddenly increace very fast, then the apache will hang, i need to restart my apache service to resume it, below is my apache conf and log message, please help to see what happen on my web server, thank you!! httpd.conf: LoadModule jk_module modules/mod_jk.so JkWorkersFile "/opt/apache-tomcat/conf/workers.properties" JkLogFile "/opt/apache-tomcat/logs/mod_jk.log" JkLogLevel debug <VirtualHost *:80> ServerAdmin admin@localhost DocumentRoot /opt/ ServerName 127.0.0.1 DirectoryIndex index.html index.htm index.asp index.jsp ErrorLog logs/test-error_log.txt CustomLog logs/test-access_log.txt common JkMount /servlet/* ajp13 JkMount /* ajp13 JkMount /*.jsp ajp13 JkMount /*.jspx ajp13 JkMount /*.do ajp13 JkMount /*.action ajp13 </VirtualHost> <IfModule mod_ssl.c> Include conf/ssl.conf </IfModule> workers.properties workers.tomcat_home=/opt/apache-tomcat workers.java_home=/usr/share/jdk1.5.0_16 ps=/ worker.list=ajp13 worker.ajp13.port=8009 worker.ajp13.host=localhost worker.ajp13.type=ajp13 worker.ajp13.lbfactor=1 shm.file=/usr/local/apache2/logs/jk.shm worker.ajp13.reply_timeout=600000 mod_jk.log [Mon Feb 16 03:10:50.284 2009] [6800:1120464] [debug] jk_child_init::mod_jk.c (2740): Initialized mod_jk/1.2.26 [Mon Feb 16 03:10:57.285 2009] [6802:1120464] [debug] do_shm_open::jk_shm.c (457): Attached shared memory [74] size=28672 free=28672 addr=0x112000 [Mon Feb 16 03:10:57.285 2009] [6802:1120464] [debug] do_shm_open::jk_shm.c (471): Reseting the shared memory for child 74 [Mon Feb 16 03:10:57.285 2009] [6802:1120464] [debug] do_shm_open_lock::jk_shm.c (262): Duplicated shared memory lock /usr/local/apache2/logs/jk-runtime-stat us.26648.lock [Mon Feb 16 03:10:57.285 2009] [6802:1120464] [debug] jk_child_init::mod_jk.c (2730): Attached shm:/usr/local/apache2/logs/jk-runtime-status.26648 (28672 byt es) [Mon Feb 16 03:10:57.285 2009] [6802:1120464] [debug] jk_child_init::mod_jk.c (2740): Initialized mod_jk/1.2.26 [Mon Feb 16 03:10:58.286 2009] [6803:1120464] [debug] do_shm_open::jk_shm.c (457): Attached shared memory [75] size=28672 free=28672 addr=0x112000 [Mon Feb 16 03:10:58.286 2009] [6803:1120464] [debug] do_shm_open::jk_shm.c (471): Reseting the shared memory for child 75 [Mon Feb 16 03:10:58.286 2009] [6803:1120464] [debug] do_shm_open_lock::jk_shm.c (262): Duplicated shared memory lock /usr/local/apache2/logs/jk-runtime-stat us.26648.lock [Mon Feb 16 03:10:58.286 2009] [6803:1120464] [debug] jk_child_init::mod_jk.c (2730): Attached shm:/usr/local/apache2/logs/jk-runtime-status.26648 (28672 byt es) [Mon Feb 16 03:10:58.286 2009] [6803:1120464] [debug] jk_child_init::mod_jk.c (2740): Initialized mod_jk/1.2.26 [Mon Feb 16 03:10:58.287 2009] [6804:1120464] [debug] do_shm_open::jk_shm.c (457): Attached shared memory [76] size=28672 free=28672 addr=0x112000 [Mon Feb 16 03:10:58.287 2009] [6804:1120464] [debug] do_shm_open::jk_shm.c (471): Reseting the shared memory for child 76 [Mon Feb 16 03:10:58.287 2009] [6804:1120464] [debug] do_shm_open_lock::jk_shm.c (262): Duplicated shared memory lock /usr/local/apache2/logs/jk-runtime-stat us.26648.lock [Mon Feb 16 03:10:58.287 2009] [6804:1120464] [debug] jk_child_init::mod_jk.c (2730): Attached shm:/usr/local/apache2/logs/jk-runtime-status.26648 (28672 byt es) [Mon Feb 16 03:10:58.287 2009] [6804:1120464] [debug] jk_child_init::mod_jk.c (2740): Initialized mod_jk/1.2.26 [Mon Feb 16 03:12:07.312 2009] [6838:1337552] [debug] jk_set_time_fmt::jk_util.c (430): Pre-processed log time stamp format is '[%a %b %d %H:%M:%S.000 %Y] ' [Mon Feb 16 03:12:07.312 2009] [6838:1337552] [debug] uri_worker_map_open::jk_uri_worker_map.c (427): rule map size is 0 [Mon Feb 16 03:12:07.312 2009] [6838:1337552] [debug] jk_set_time_fmt::jk_util.c (430): Pre-processed log time stamp format is '[%a %b %d %H:%M:%S.000 %Y] ' [Mon Feb 16 03:12:07.312 2009] [6838:1337552] [debug] uri_worker_map_open::jk_uri_worker_map.c (427): rule map size is 6 [Mon Feb 16 03:12:07.312 2009] [6838:1337552] [debug] uri_worker_map_add::jk_uri_worker_map.c (379): wildchar rule '/servlet/*=ajp13' source 'JkMount' was ad ded