On 06/02/2012 10:26, Amol Puglia wrote: > Hello , > > Thanks for the response. > > I am using following worker and no of threads. > > Worker is Prefork and > > ThreadsPerChild 25 > > Below is the details for the same.
Please post your reply below the relevant part of the previous email. In most email clients this is a case of scrolling down a bit. Not doing so leads to 'top-posting' which makes following the conversation flow harder. > Server version: Apache/2.2.16 (Unix) > Server built: Sep 27 2010 12:48:44 > Server's Module Magic Number: 20051115:24 > Server loaded: APR 1.4.2, APR-Util 1.3.9 > Compiled using: APR 1.4.2, APR-Util 1.3.9 > Architecture: 32-bit > Server MPM: Prefork > threaded: no > forked: yes (variable process count) > > <IfModule worker.c> > StartServers 2 > MaxClients 250 > MinSpareThreads 25 > MaxSpareThreads 75 > ThreadsPerChild 25 > MaxRequestsPerChild 0 > </IfModule> Please post prefork.c instead, as that's what you're using. p > Timeout 300 > KeepAlive On > MaxKeepAliveRequests 100 > KeepAliveTimeout 15 > HostnameLookups Off > ________________________________ > From: Pid <p...@pidster.com> > To: Tomcat Users List <users@tomcat.apache.org> > Sent: Monday, February 6, 2012 3:44 PM > Subject: Re: Frequently Getting Service Temporaily availbale message from > backend tomcat servers > > 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]
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