Hi,
I have a tomcat cluster ( with tomcat 1 and tomcat 2 ) with a hardware
load balancer infront. Session replication only works in some scenario and
does not in others. Here is the scenario where it works...
1) Start tomcat 1
2) access the web application ( session gets created in tomcat 1 )
3) Start tomcat 2 ( session gets replicated onto tomcat 2 )
4) kill tomcat 1
5) access the web application ( works fine )
N here is the scenario where it does not work
1) Start tomcat 1
2) Start tomcat 2
3) create atleast once session on tomcat 1 and tomcat 2 by accessing the
web application
4) kill any tomcat...... lets say tomcat 1
5) try to access the session that got created in tomcat1 ( logs out from
the we application...session attributes are lost )
and also gives the below warning on tomcat 1
Tribes-MembershipReceiver] [WARN]
org.apache.catalina.tribes.membership.McastService - Error receiving mcast
package. Sleeping 500ms
java.net.SocketException: socket closed
at java.net.PlainDatagramSocketImpl.receive0(Native Method)
at
java.net.PlainDatagramSocketImpl.receive(PlainDatagramSocketImpl.java:136)
at java.net.DatagramSocket.receive(DatagramSocket.java:712)
at
org.apache.catalina.tribes.membership.McastServiceImpl.receive(McastServiceImpl.java:314)
at
org.apache.catalina.tribes.membership.McastServiceImpl$ReceiverThread.run(McastServiceImpl.java:414)
2008-11-20 17:08:29.999 [Tribes-MembershipReceiver] [WARN]
org.apache.catalina.tribes.membership.McastService - Error receiving mcast
package. Sleeping 500ms
java.net.SocketException: socket closed
at java.net.PlainDatagramSocketImpl.receive0(Native Method)
at
java.net.PlainDatagramSocketImpl.receive(PlainDatagramSocketImpl.java:136)
at java.net.DatagramSocket.receive(DatagramSocket.java:712)
at
org.apache.catalina.tribes.membership.McastServiceImpl.receive(McastServiceImpl.java:314)
at
org.apache.catalina.tribes.membership.McastServiceImpl$ReceiverThread.run(McastServiceImpl.java:414)
2008-11-20 17:08:29.999 [main] [INFO]
org.apache.coyote.http11.Http11Protocol - Stopping Coyote HTTP/1.1 on
http-8080
I have my logs configured to debug level and all the messages I see from
tribes show that the session is being replicated successfully. Please let me
know if any of those logs are needed for better understanding.
I am also monitoring tomcats with JConsole and it shows that the sessions
are getting replicated.
Thanks for your help
Rohit
