On 06/02/2012 08:58, Amol Puglia wrote: > Hello Team, > > I have configured apache to load balanced six tomcat instances in the backend > using mod_proxy_balance and mod_proxy_ajp modules. > > I am frequently getting service temporary unavailable message and following > error in the apache error logs. > > [Mon Feb 06 09:07:28 2012] [error] proxy: BALANCER: (balancer://cluster). All > workers are in error state for route (marsprod_rmiserver_3) > [Mon Feb 06 09:07:32 2012] [error] proxy: BALANCER: (balancer://cluster). All > workers are in error state for route (marsprod_rmiserver_3) > [Mon Feb 06 09:07:36 2012] [error] proxy: BALANCER: (balancer://cluster). All > workers are in error state for route (marsprod_rmiserver_3) > [Mon Feb 06 09:07:37 2012] [error] proxy: BALANCER: (balancer://cluster). All > workers are in error state for route (marsprod_rmiserver_3) > [Mon Feb 06 09:07:42 2012] [error] proxy: BALANCER: (balancer://cluster). All > workers are in error state for route (marsprod_rmiserver_3) > [Mon Feb 06 09:07:45 2012] [error] proxy: BALANCER: (balancer://cluster). All > workers are in error state for route (marsprod_rmiserver_3) > [Mon Feb 06 09:08:02 2012] [error] proxy: BALANCER: (balancer://cluster). All > workers are in error state for route (marsprod_rmiserver_3) > > > I am using following version of apache and tomcat. > > Apache version :- Apache/2.2.16 > > Tomcat :- 6.0.26 > > Jdk :-1.6.0_24
Thanks for providing the information above. You should plan an upgrade of each of those ASAP. > Below is the configuration of my apache and tomcat. > > # Port 80 > Listen server_name:80 > > <VirtualHost _default_:80> > ServerName server_name > ServerAlias server_name > ServerAlias server_name > > > <Directory /eMatrix> > > Order deny,allow > > Deny from all > > Allow from 153.88.251.174 153.88.251.160 153.88.251.165 > 153.88.251.170 153.88.251.212 153.88.251.199 > > </Directory> > > Timeout 1800 > ProxyTimeout 1800 > ProxyRequests Off > > > ProxyPass /eMatrix balancer://cluster > stickysession=JSESSIONID|jsessionid nofailover=On OK - here is your balancer definition, you'll need to change it to: ProxyPass /eMatrix balancer://cluster/eMatrix stickysession=JSESSIONID|jsessionid nofailover=On > #ProxyPass /eMatrix balancer://cluster stickysession=JSESSIONID > nofailover=On > > ProxyPreserveHost On > > > ProxyPass /eMatrix ajp://server_name:8009/eMatrix > > ProxyPass /eMatrix ajp://server_name:8010/eMatrix > > ProxyPass /eMatrix ajp://server_name:8011/eMatrix > > ProxyPass /eMatrix ajp://server_name:9009/eMatrix > > ProxyPass /eMatrix ajp://server_name:9010/eMatrix > > ProxyPass /eMatrix ajp://server_name:9011/eMatrix If you have these lines, they will each override the one above. So your balancer is overridden. > ProxyPassReverse /eMatrix ajp://server_name:8009/eMatrix > > ProxyPassReverse /eMatrix ajp://server_name:8010/eMatrix > > ProxyPassReverse /eMatrix ajp://server_name:8011/eMatrix > > ProxyPassReverse /eMatrix ajp://server_name:9009/eMatrix > > ProxyPassReverse /eMatrix ajp://server_name:9010/eMatrix > > ProxyPassReverse /eMatrix ajp://server_name:9011/eMatrix The ProxyPassReverse won't be needed. > <Proxy balancer://cluster> > BalancerMember ajp://server_name:8009/eMatrix > route=marsprod_rmiserver_1 loadfactor=33 retry=60 > BalancerMember ajp://server_name:8010/eMatrix > route=marsprod_rmiserver_2 loadfactor=33 retry=60 > BalancerMember ajp://server_name:8011/eMatrix > route=marsprod_rmiserver_3 loadfactor=33 retry=60 > BalancerMember ajp://server_name:9009/eMatrix > route=marsprod_rmiserver_4 loadfactor=33 retry=60 > BalancerMember ajp://server_name:9010/eMatrix > route=marsprod_rmiserver_5 loadfactor=33 retry=60 Remove the app path from the balancer members: BalancerMember ajp://server_name:9010 route=marsprod_rmiserver_5 loadfactor=33 retry=60 > #load balancing performed based on number of user requests > #ProxySet lbmethod=byrequests > # Report server is for Report purpose only so balancing is required > now. > BalancerMember ajp://server_name:9011/eMatrix > route=marsprod_rmiserver_6 loadfactor=33 retry=60 > ProxySet lbmethod=byrequests > </Proxy> > > #Status page for balancer > > <Location /balancer> > SetHandler balancer-manager > Order Deny,Allow > Deny from all > Allow from all > </Location> > > ProxyStatus On > > <Location /status> > SetHandler server-status > Order Deny,Allow > Deny from all > Allow from all > </Location> > > ErrorLog /opt/web/apache/app/mxora/logs/error.log > > </VirtualHost> > > > Tomcat Configuration Server.xml > > <!-- for Native tomcat setup--> > <Connector port="8082" > protocol="org.apache.coyote.http11.Http11AprProtocol" > maxHttpHeaderSize="8192" > maxThreads="60" > maxPostSize="0" > enableLookups="false" > redirectPort="8443" > acceptCount="150" > compression="on" > connectionTimeout="60000" > disableUploadTimeout="true" > URIEncoding="UTF-8"/> > > > <!-- Define an AJP 1.3 Connector on port 9084 --> > <Connector port="8010" > protocol="AJP/1.3" > redirectPort="8443" > maxThreads="60" > enableLookups="false" > maxPostSize="0" > connectionTimeout="60000" > URIEncoding="UTF-8"/> You have 60 threads per connector. How did you determine this value? In order to calculate how many connections you need, we need to see more details of the HTTPD config for your server. Specifically, we'll need to work out whether you're using the Prefork or Worker MPM and what the value of ThreadsPerChild is. > Kindly help me to trobleshoot the issue. Please include the Engine definition as well. p -- [key:62590808]
signature.asc
Description: OpenPGP digital signature
