| Summary: | Loading mod_authz_host without mod_auth_digest causes ~1Mb leak per graceful restart | ||
|---|---|---|---|
| Product: | Apache httpd-2 | Reporter: | Aseem Mohanty <amohanty> |
| Component: | Core | Assignee: | Apache HTTPD Bugs Mailing List <bugs> |
| Status: | RESOLVED INVALID | ||
| Severity: | normal | CC: | amohanty |
| Priority: | P2 | ||
| Version: | 2.5-HEAD | ||
| Target Milestone: | --- | ||
| Hardware: | Other | ||
| OS: | Linux | ||
Sorry but I cannot reproduce this behaviour. So my closest guess for now would be that Gentoo / Ubuntu added further patches to their httpd binaries that cause this behaviour or that you are using a 3rd party module that causes this. Please check if you can reproduce this behaviour if you compile httpd by yourself from the sources at httpd.apache.org. It appears you are correct. A base install from source using: ./configure --prefix=/opt --enable-modules=all --enable-mods-shared=all --enable-so --with-included-apr does not display this behaviour. I failed to mention that we do use mod_python and as soon as I throw in mod_python the mix, the behaviour is back. Oh well, time to file a bug against mod_python I guess. Thanks. Thanks for your feedback. Based on your reply I mark this report as invalid. |
In a vanilla apache2.2.x configuration if I only load mod_authz_host and none of the other mod_auth* modules, every graceful restart causes ~1Mb leak in the parent process. Steps to reproduce: Gentoo: 1. In /etc/apache2/httd.conf comment out all "LoadModule auth*" directives except LoadModule authz_host_module modules/mod_authz_host.so Ubuntu Feisty: 1. In /etc/apache2/mods-enabled rename auth*.load files except authz_host.load to auth*.load.not 2. Start apache 3. Track apache parent process: top -d1 -p $(pgrep -o apache) 4. Hit apache instances with graceful restarts: for i in $(seq 150); do echo $i; kill -USR1 $(pgrep -o apache); sleep 2 done In this case the parent will leak ~1Mb per restart. If however in each of the configurations mod_auth_digest.so is also loaded the leak is only about 150-200K or so per graceful restart. This is on a server with 0 load. In my case it caused apache instances that were restarted every 55 minutes to grow up to 300Mb in a week. Tested on: 1. gentoo (64 bit dual proc AMD): Linux host1 2.6.16-gentoo-r9 #7 SMP Fri Mar 16 17:35:26 UTC 2007 x86_64 AMD Opteron(tm) Processor 248 AuthenticAMD GNU/Linux Server version: Apache/2.2.4 (Unix) Server built: Jun 26 2007 19:29:33 Server's Module Magic Number: 20051115:4 Server loaded: APR 1.2.8, APR-Util 1.2.8 Compiled using: APR 1.2.8, APR-Util 1.2.8 Architecture: 64-bit Server MPM: Prefork threaded: no forked: yes (variable process count) Server compiled with.... -D APACHE_MPM_DIR="server/mpm/prefork" -D APR_HAS_SENDFILE -D APR_HAS_MMAP -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled) -D APR_USE_SYSVSEM_SERIALIZE -D APR_USE_PTHREAD_SERIALIZE -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT -D APR_HAS_OTHER_CHILD -D AP_HAVE_RELIABLE_PIPED_LOGS -D DYNAMIC_MODULE_LIMIT=128 -D HTTPD_ROOT="/usr" -D SUEXEC_BIN="/usr/sbin/suexec" -D DEFAULT_PIDLOG="/var/run/httpd.pid" -D DEFAULT_SCOREBOARD="logs/apache_runtime_status" -D DEFAULT_LOCKFILE="/var/run/accept.lock" -D DEFAULT_ERRORLOG="logs/error_log" -D AP_TYPES_CONFIG_FILE="/etc/apache2/mime.types" -D SERVER_CONFIG_FILE="/etc/apache2/httpd.conf" 2. Ubuntu Feisty (32 bit Intel core duo): Linux host2 2.6.20-16-generic #2 SMP Thu Jun 7 20:19:32 UTC 2007 i686 GNU/Linux Server version: Apache/2.2.3 Server built: Jan 15 2007 18:14:50 Server's Module Magic Number: 20051115:3 Server loaded: APR 1.2.7, APR-Util 1.2.7 Compiled using: APR 1.2.7, APR-Util 1.2.7 Architecture: 32-bit Server MPM: Prefork threaded: no forked: yes (variable process count) Server compiled with.... -D APACHE_MPM_DIR="server/mpm/prefork" -D APR_HAS_SENDFILE -D APR_HAS_MMAP -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled) -D APR_USE_SYSVSEM_SERIALIZE -D APR_USE_PTHREAD_SERIALIZE -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT -D APR_HAS_OTHER_CHILD -D AP_HAVE_RELIABLE_PIPED_LOGS -D DYNAMIC_MODULE_LIMIT=128 -D HTTPD_ROOT="" -D SUEXEC_BIN="/usr/lib/apache2/suexec" -D DEFAULT_PIDLOG="/var/run/apache2.pid" -D DEFAULT_SCOREBOARD="logs/apache_runtime_status" -D DEFAULT_LOCKFILE="/var/run/apache2/accept.lock" -D DEFAULT_ERRORLOG="logs/error_log" -D AP_TYPES_CONFIG_FILE="/etc/apache2/mime.types" -D SERVER_CONFIG_FILE="/etc/apache2/apache2.conf"