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From Igor Cicimov <icici...@gmail.com>
Subject Re: [users@httpd] httpd 2.4.2 not closing backend connection after proxypass ttl expires
Date Fri, 01 Jun 2012 08:40:02 GMT
Why double ProxyPass?

ProxyPass / http://localhost-vip.com/smax=0 ttl=60

ProxyPass / http://localhost-vip.com/

ProxyPassReverse / http://localhost-vip.com/
 On Jun 1, 2012 3:48 AM, "David Woodworth" <David.Woodworth@mitchell.com>
wrote:

> Hello,****
>
> ** **
>
> I am running Apache 2.4.2 as a reverse proxy server.  The backend IIS http
> server has a timeout of 120 seconds for the backend connection.  I
> occasionally see 502 errors because the backend connection is closed by the
> IIS server and Apache still tries to use it.  So I have added “smax=0
> ttl=60” to my ProxyPass directive, but apache continues to use this
> connection after 60 secs of idle time.****
>
> ** **
>
> I test with making 10 consecutive calls that return good.  Apache re-uses
> the same connection as I would expect.  I wait 90 seconds and attempt
> another connection.  It still re-uses the same back-end connection that I
> would have expected to have timed-out by then.  Has anyone else seen this
> behavior or know of a solution?  Any suggestions appreciated.****
>
> ** **
>
> Configured with:              configure  --with-mpm=prefork****
>
> ** **
>
> Conf file: (ip and urls modified to hide)****
>
> ** **
>
> ServerTokens OS****
>
> ServerRoot "/usr/local/apache"****
>
> PidFile run/httpd-repairctr.pid****
>
> Timeout 120****
>
> KeepAlive On****
>
> MaxKeepAliveRequests 100****
>
> KeepAliveTimeout 15****
>
> ** **
>
> <IfModule prefork.c>****
>
> StartServers       1****
>
> MinSpareServers    1****
>
> MaxSpareServers    1****
>
> ServerLimit      2048****
>
> MaxClients       2048****
>
> MaxRequestsPerChild  4000****
>
> </IfModule>****
>
> ** **
>
> <IfModule worker.c>****
>
> StartServers         2****
>
> MaxClients         150****
>
> MinSpareThreads     25****
>
> MaxSpareThreads     75****
>
> ThreadsPerChild     25****
>
> MaxRequestsPerChild  0****
>
> </IfModule>****
>
> ** **
>
> Listen nn.nn.nn.nn:8087****
>
> ** **
>
> 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 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_ajp_module modules/mod_proxy_ajp.so****
>
> LoadModule proxy_balancer_module modules/mod_proxy_balancer.so****
>
> LoadModule slotmem_shm_module modules/mod_slotmem_shm.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****
>
> LoadModule rewrite_module modules/mod_rewrite.so****
>
> ** **
>
> <IfModule unixd_module>****
>
> User apache****
>
> Group apache****
>
> </IfModule>****
>
> ** **
>
> ServerAdmin root@localhost****
>
> ** **
>
> UseCanonicalName Off****
>
> DocumentRoot "/var/www/html"****
>
> ** **
>
> <Directory />****
>
>     Options FollowSymLinks****
>
>     Require all denied****
>
> </Directory>****
>
> ** **
>
> <Directory "/var/www/html">****
>
>     Options Indexes FollowSymLinks****
>
>     AllowOverride None****
>
>     Require all granted****
>
> </Directory>****
>
> ** **
>
> <IfModule mod_userdir.c>****
>
>     #****
>
>     # UserDir is disabled by default since it can confirm the presence****
>
>     # of a username on the system (depending on home directory****
>
>     # permissions).****
>
>     #****
>
>     UserDir disable****
>
> ** **
>
>     #****
>
>     # To enable requests to /~user/ to serve the user's public_html****
>
>     # directory, remove the "UserDir disable" line above, and uncomment***
> *
>
>     # the following line instead:****
>
>     #****
>
>     #UserDir public_html****
>
> ** **
>
> </IfModule>****
>
> ** **
>
> DirectoryIndex index.html index.html.var****
>
> ** **
>
> AccessFileName .htaccess****
>
> ** **
>
> <Files ~ "^\.ht">****
>
>     Require all denied****
>
> </Files>****
>
> ** **
>
> TypesConfig /etc/mime.types****
>
> ** **
>
> <IfModule mod_mime_magic.c>****
>
>     MIMEMagicFile conf/magic****
>
> </IfModule>****
>
> ** **
>
> HostnameLookups Off****
>
> ** **
>
> LogLevel warn****
>
> LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\""
> combined****
>
> LogFormat "%h %l %u %t \"%r\" %>s %b" common****
>
> LogFormat "%{Referer}i -> %U" referer****
>
> LogFormat "%{User-agent}i" agent****
>
> CustomLog logs/access_log combined****
>
> ErrorLog logs/error_log****
>
> ** **
>
> ServerSignature On****
>
> ** **
>
> Alias /icons/ "/usr/local/apache/icons/"****
>
> ** **
>
> <Directory "/usr/local/apache/icons">****
>
>     Options Indexes MultiViews****
>
>     AllowOverride None****
>
>     Require all granted****
>
> </Directory>****
>
> ** **
>
> <IfModule mod_dav_fs.c>****
>
>     # Location of the WebDAV lock database.****
>
>     DAVLockDB /var/lib/dav/lockdb****
>
> </IfModule>****
>
> ** **
>
> ScriptAlias /cgi-bin/ "/usr/local/apache/cgi-bin/"****
>
> ** **
>
> <Directory "/usr/local/apache/cgi-bin">****
>
>     AllowOverride None****
>
>     Options None****
>
>     Require all granted****
>
> </Directory>****
>
> ** **
>
> IndexOptions FancyIndexing VersionSort NameWidth=* HTMLTable****
>
> ** **
>
> ReadmeName README.html****
>
> HeaderName HEADER.html****
>
> ** **
>
> IndexIgnore .??* *~ *# HEADER* README* RCS CVS *,v *,t****
>
> ** **
>
> AddDefaultCharset UTF-8****
>
> AddType application/x-compress .Z****
>
> AddType application/x-gzip .gz .tgz****
>
> AddHandler type-map var****
>
> AddType text/html .shtml****
>
> AddOutputFilter INCLUDES .shtml****
>
> ** **
>
> Alias /error/ "/var/www/error/"****
>
> ** **
>
> <IfModule mod_negotiation.c>****
>
> <IfModule mod_include.c>****
>
>     <Directory "/var/www/error">****
>
>         AllowOverride None****
>
>         Options IncludesNoExec****
>
>         AddOutputFilter Includes html****
>
>         AddHandler type-map var****
>
>         Require all granted****
>
>         LanguagePriority en es de fr****
>
>         ForceLanguagePriority Prefer Fallback****
>
>     </Directory>****
>
> ** **
>
> BrowserMatch "Mozilla/2" nokeepalive****
>
> BrowserMatch "MSIE 4\.0b2;" nokeepalive downgrade-1.0 force-response-1.0**
> **
>
> BrowserMatch "RealPlayer 4\.0" force-response-1.0****
>
> BrowserMatch "Java/1\.0" force-response-1.0****
>
> BrowserMatch "JDK/1\.0" force-response-1.0****
>
> ** **
>
> BrowserMatch "Microsoft Data Access Internet Publishing Provider"
> redirect-carefully****
>
> BrowserMatch "MS FrontPage" redirect-carefully****
>
> BrowserMatch "^WebDrive" redirect-carefully****
>
> BrowserMatch "^WebDAVFS/1.[0123]" redirect-carefully****
>
> BrowserMatch "^gnome-vfs/1.0" redirect-carefully****
>
> BrowserMatch "^XML Spy" redirect-carefully****
>
> BrowserMatch "^Dreamweaver-WebDAV-SCM1" redirect-carefully****
>
> ** **
>
> <VirtualHost *:8087>****
>
>     DocumentRoot /var/www/html/localhost.com****
>
>     ServerName localhost.com****
>
>     ErrorLog logs/localhost.com-error_log****
>
>     CustomLog logs/localhost.com-access_log common****
>
>     ProxyPass /keepalive.htm !****
>
>     ProxyPass / http://localhost-vip.com/ smax=0 ttl=60****
>
>     ProxyPass / http://localhost-vip.com/****
>
>     ProxyPassReverse / http://localhost-vip.com/****
>
>     ProxyPreserveHost on****
>
>     RewriteEngine on****
>
>     RewriteRule ^/api/(.*) http://localhost-vip.com/api/$1 [P,NC]****
>
> </VirtualHost>****
>
> ** **
>
> ** **
>
> David Woodworth****
>
> Mitchell International****
>
> Office:  858-368-7547****
>
> ** **
>

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