Dear mailing list,
currently, we use the Apache2 version:
- Apache2 2.2.16 64bit
- standard "mod_proxy_balancer" module
with the following V-HOST configuration including a proxy balancer directive
(with two Apache Tomcat instances behind):
<Proxy balancer://fs4server>
BalancerMember ajp://rb-wcmstc1.xx.xxxxx.xxx:8009 loadfactor=100 retry=10
route=rb-wcmstc1
BalancerMember ajp://rb-wcmstc2.xx.xxxxx.xxx:8009 loadfactor=100 retry=10
route=rb-wcmstc2
ProxySet stickysession=JSESSIONID
ProxySet lbmethod=byrequests
#ProxySet nofailover=On
ProxySet timeout=30
</Proxy>
In production environment, we discover connection switches from "rb-wcmstc1" to
"rb-wcmstc2" and vice versa (documented in the Tomcat-Logs) for the same
Session-ID:
"rb-wcmstc1"
tomcat@<rb-wcmstc1>:/opt/tomcat/logs $ grep -i "5893975846599935313" *
log4j-catalina.log.13:TRACE 29.09.2010 14:16:58
(de.espirit.firstspirit.io.servlet.ClientIOServlet): Opening connection to
10.35.32.123, id=5893975846599935313
log4j-catalina.log.13:TRACE 29.09.2010 14:16:58
(de.espirit.firstspirit.io.servlet.ClientIOServlet): Server call from
10.35.32.123, id=5893975846599935313, clientLength=82, serverLength=79,
serverResponseLength=1, 455 ms
"rb-wcmstc2"
DEBUG 29.09.2010 14:16:58 (de.espirit.firstspirit.io.servlet.ClientIOServlet):
IO error with 10.35.32.123, port=1088, host=rb-wcmsfs4.de.bosch.com - java.
lang.IllegalStateException: Connection '5893975846599935313' not found
java.lang.IllegalStateException: Connection '5893975846599935313' not found
at
de.espirit.firstspirit.io.servlet.ClientIOServlet.callServer(ClientIOServlet.java:194)
at
de.espirit.firstspirit.io.servlet.ClientIOServlet.doPost(ClientIOServlet.java:117)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
Although, the "stickysession" attribute is set properly using the "JSESSIONID"
cookie name and the Apache-Tomcat instances are up and running, the connection
SWITCHES. Why?
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