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We are attempting to run identical servlets under several Tomcat 7.0.8 nodes behind a load balancer (Apache 2.0.54 using mod_jk), but we have been unable to get sticky sessions to work. Initial requests are forwarded to a node as expected,
but subsequent requests from the same client are being forwarded to the second node ala round robin, which triggers session not found logic in our application and causes the connection to terminate. Due to environment limitations, we cannot employ session
persistence to our Tomcat instances and must make use of sticky sessions. My Tomcat instances have been properly configured (HTTP connector commented out, AJP 1.3 connected uncommented, jvmRoute attribute in each instance set to the workers listed in workers.properties
file). Here are the mod_jk entries in my httpd.conf file: LoadModule jk_module /<path_to>/apache/modules/mod_jk.so JkWorkersFile /<path_to>/apache/conf/workers.properties JkLogFile logs/mod_jk.log JkLogLevel debug JkMount /* loadbalancer Here are the entries in my workers.property file: worker.list=loadbalancer worker.tomcat7A.type=ajp13 worker.tomcat7A.host=<host_name> worker.tomcat7A.port=4911 worker.tomcat7A.lbfactor=1 worker.tomcat7C.type=ajp13 worker.tomcat7C.host=<host_name> worker.tomcat7C.port=4931 worker.tomcat7C.lbfactor=1 worker.loadbalancer.type=lb worker.loadbalancer.balance_workers=tomcat7A,tomcat7C worker.loadbalancer.sticky_session=1 worker.jkstatus.type=status What am I doing wrong? |
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