httpd exits 1 quickly after launch with no stderr when proxy_balancer_module (and proxy_module) is enabled. This makes it extremely difficult to determine what the problem is. In general, I'm trying to enable proxies and use proxy_balancer_module. However, even though mod_proxy loads fine, whenever I uncomment loading mod_proxy_balancer.so, httpd exits with 1 and no stderr. Built from source: apr-1.5.1 apr-util-1.5.4 --with-ldap httpd-2.4.12: ./configure --prefix=/usr/local/apache2 --enable-mods-shared=all --enable-ldap --enable-auth-ldap --enable-authnz-ldap --enable-ssl --with-ldap --with-apr=/usr/local/apr/bin/apr-1-config --with-apr-util=/usr/local/apr/bin/apu-1-config Mostly using the default .conf, the extra module loading is in a different .conf under sites, reproduced below. ServerRoot "/usr/local/apache2" Listen 80 LoadModule authn_file_module modules/mod_authn_file.so LoadModule authn_core_module modules/mod_authn_core.so LoadModule authz_host_module modules/mod_authz_host.so LoadModule authz_groupfile_module modules/mod_authz_groupfile.so LoadModule authz_user_module modules/mod_authz_user.so LoadModule authz_core_module modules/mod_authz_core.so LoadModule access_compat_module modules/mod_access_compat.so LoadModule auth_basic_module modules/mod_auth_basic.so LoadModule reqtimeout_module modules/mod_reqtimeout.so LoadModule filter_module modules/mod_filter.so LoadModule mime_module modules/mod_mime.so LoadModule log_config_module modules/mod_log_config.so LoadModule env_module modules/mod_env.so LoadModule headers_module modules/mod_headers.so LoadModule setenvif_module modules/mod_setenvif.so LoadModule version_module modules/mod_version.so LoadModule unixd_module modules/mod_unixd.so LoadModule status_module modules/mod_status.so LoadModule autoindex_module modules/mod_autoindex.so LoadModule dir_module modules/mod_dir.so LoadModule alias_module modules/mod_alias.so <IfModule unixd_module> User daemon Group daemon </IfModule> ServerAdmin you@example.com <Directory /> AllowOverride none Require all denied </Directory> DocumentRoot "/usr/local/apache2/htdocs" <Directory "/usr/local/apache2/htdocs"> Options Indexes FollowSymLinks AllowOverride None Require all granted </Directory> <IfModule dir_module> DirectoryIndex index.html </IfModule> <Files ".ht*"> Require all denied </Files> ErrorLog "logs/error_log" LogLevel warn <IfModule log_config_module> LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined LogFormat "%h %l %u %t \"%r\" %>s %b" common <IfModule logio_module> LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio </IfModule> CustomLog "logs/access_log" common </IfModule> <IfModule alias_module> ScriptAlias /cgi-bin/ "/usr/local/apache2/cgi-bin/" </IfModule> <IfModule cgid_module> </IfModule> <Directory "/usr/local/apache2/cgi-bin"> AllowOverride None Options None Require all granted </Directory> <IfModule mime_module> TypesConfig conf/mime.types AddType application/x-compress .Z AddType application/x-gzip .gz .tgz </IfModule> <IfModule proxy_html_module> Include conf/extra/proxy-html.conf </IfModule> <IfModule ssl_module> SSLRandomSeed startup builtin SSLRandomSeed connect builtin </IfModule> Include /usr/local/apache2/conf/sites/*.conf ### in sites/*.conf: Listen 443 LoadModule cgid_module modules/mod_cgid.so LoadModule authnz_ldap_module modules/mod_authnz_ldap.so LoadModule ldap_module modules/mod_ldap.so LoadModule ssl_module modules/mod_ssl.so LoadModule authn_socache_module modules/mod_authn_socache.so LoadModule socache_shmcb_module modules/mod_socache_shmcb.so #LoadModule proxy_html_module modules/mod_proxy_html.so LoadModule proxy_module modules/mod_proxy.so #LoadModule proxy_connect_module modules/mod_proxy_connect.so #LoadModule proxy_ftp_module modules/mod_proxy_ftp.so LoadModule proxy_http_module modules/mod_proxy_http.so #LoadModule proxy_fcgi_module modules/mod_proxy_fcgi.so #LoadModule proxy_scgi_module modules/mod_proxy_scgi.so #LoadModule proxy_fdpass_module modules/mod_proxy_fdpass.so #LoadModule proxy_wstunnel_module modules/mod_proxy_wstunnel.so #LoadModule proxy_ajp_module modules/mod_proxy_ajp.so #LoadModule proxy_express_module modules/mod_proxy_express.so LoadModule proxy_balancer_module modules/mod_proxy_balancer.so LoadModule lbmethod_byrequests_module modules/mod_lbmethod_byrequests.so LoadModule lbmethod_bytraffic_module modules/mod_lbmethod_bytraffic.so LoadModule lbmethod_bybusyness_module modules/mod_lbmethod_bybusyness.so LoadModule lbmethod_heartbeat_module modules/mod_lbmethod_heartbeat.so #LoadModule xml2enc_module modules/mod_xml2enc.so SSLSessionCache "shmcb:/usr/local/apache2/logs/ssl_scache(512000)" SSLSessionCacheTimeout 300
maybe the slotmem requirement?
Are you talking about https://bz.apache.org/bugzilla/show_bug.cgi?id=52841 Also, I should have included the debug output: % sudo /usr/local/apache2/bin/httpd -e debug -X [Mon Mar 23 12:58:19.743679 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module authn_file_module from /usr/local/apache2/modules/mod_authn_file.so [Mon Mar 23 12:58:19.744064 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module authn_core_module from /usr/local/apache2/modules/mod_authn_core.so [Mon Mar 23 12:58:19.744195 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module authz_host_module from /usr/local/apache2/modules/mod_authz_host.so [Mon Mar 23 12:58:19.744347 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module authz_groupfile_module from /usr/local/apache2/modules/mod_authz_groupfile.so [Mon Mar 23 12:58:19.744522 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module authz_user_module from /usr/local/apache2/modules/mod_authz_user.so [Mon Mar 23 12:58:19.744696 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module authz_core_module from /usr/local/apache2/modules/mod_authz_core.so [Mon Mar 23 12:58:19.744883 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module access_compat_module from /usr/local/apache2/modules/mod_access_compat.so [Mon Mar 23 12:58:19.745028 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module auth_basic_module from /usr/local/apache2/modules/mod_auth_basic.so [Mon Mar 23 12:58:19.745202 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module reqtimeout_module from /usr/local/apache2/modules/mod_reqtimeout.so [Mon Mar 23 12:58:19.745361 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module filter_module from /usr/local/apache2/modules/mod_filter.so [Mon Mar 23 12:58:19.745530 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module mime_module from /usr/local/apache2/modules/mod_mime.so [Mon Mar 23 12:58:19.745756 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module log_config_module from /usr/local/apache2/modules/mod_log_config.so [Mon Mar 23 12:58:19.745903 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module env_module from /usr/local/apache2/modules/mod_env.so [Mon Mar 23 12:58:19.746089 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module headers_module from /usr/local/apache2/modules/mod_headers.so [Mon Mar 23 12:58:19.746308 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module setenvif_module from /usr/local/apache2/modules/mod_setenvif.so [Mon Mar 23 12:58:19.746954 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module version_module from /usr/local/apache2/modules/mod_version.so [Mon Mar 23 12:58:19.747113 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module unixd_module from /usr/local/apache2/modules/mod_unixd.so [Mon Mar 23 12:58:19.747306 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module status_module from /usr/local/apache2/modules/mod_status.so [Mon Mar 23 12:58:19.747522 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module autoindex_module from /usr/local/apache2/modules/mod_autoindex.so [Mon Mar 23 12:58:19.747770 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module dir_module from /usr/local/apache2/modules/mod_dir.so [Mon Mar 23 12:58:19.748027 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module alias_module from /usr/local/apache2/modules/mod_alias.so [Mon Mar 23 12:58:19.749006 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module cgid_module from /usr/local/apache2/modules/mod_cgid.so [Mon Mar 23 12:58:19.751149 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module authnz_ldap_module from /usr/local/apache2/modules/mod_authnz_ldap.so [Mon Mar 23 12:58:19.751484 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module ldap_module from /usr/local/apache2/modules/mod_ldap.so [Mon Mar 23 12:58:19.751981 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module ssl_module from /usr/local/apache2/modules/mod_ssl.so [Mon Mar 23 12:58:19.752272 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module authn_socache_module from /usr/local/apache2/modules/mod_authn_socache.so [Mon Mar 23 12:58:19.752421 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module socache_shmcb_module from /usr/local/apache2/modules/mod_socache_shmcb.so [Mon Mar 23 12:58:19.752845 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module proxy_module from /usr/local/apache2/modules/mod_proxy.so [Mon Mar 23 12:58:19.753462 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module proxy_http_module from /usr/local/apache2/modules/mod_proxy_http.so [Mon Mar 23 12:58:19.754041 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module proxy_balancer_module from /usr/local/apache2/modules/mod_proxy_balancer.so [Mon Mar 23 12:58:19.754179 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module lbmethod_byrequests_module from /usr/local/apache2/modules/mod_lbmethod_byrequests.so [Mon Mar 23 12:58:19.754305 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module lbmethod_bytraffic_module from /usr/local/apache2/modules/mod_lbmethod_bytraffic.so [Mon Mar 23 12:58:19.754423 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module lbmethod_bybusyness_module from /usr/local/apache2/modules/mod_lbmethod_bybusyness.so [Mon Mar 23 12:58:19.754578 2015] [so:debug] [pid 94898:tid 140735259001616] mod_so.c(266): AH01575: loaded module lbmethod_heartbeat_module from /usr/local/apache2/modules/mod_lbmethod_heartbeat.so % echo $? 1
Yes, adding in these two modules allows httpd to stay alive: LoadModule slotmem_shm_module modules/mod_slotmem_shm.so LoadModule slotmem_plain_module modules/mod_slotmem_plain.so It would be great if a debug / error message could be added to this codepath. I did not even see the message "Failed to lookup provider 'shm' for 'slotmem': is mod_slotmem_shm loaded??" in the debug log.
I'm not sue why you don't see it. Are you sure you're looking at the main/base error log? I see you didn't attach _any_ erorlog messages.
That's because there are no error log messages when I launch httpd. When launching automatically through launchd (on Mac OS X) I modified the plist to spit stdout and stderr to a log. Without including the slotmem modules, loading / starting the launchd plist does not output anything to the stdout or stderr log; system log shows something like "httpd exited with 1. Relaunching in 10s..." When running through command line 'sudo httpd -e debug -X', I get some debug module output as pasted above, but no errors as far as I can see. The individual sites' access and error logs are not populated at all, I'm assuming because httpd never loads fully before exiting.
> The individual sites' access and error logs are not populated at all Right, they shouldn't. But the globally defined errorlog should (and does) on other platforms.
[Sat Jun 27 08:04:08.614432 2020] [proxy_balancer:emerg] [pid 402:tid 4437056960] AH01177: Failed to lookup provider 'shm' for 'slotmem': is mod_slotmem_shm loaded??