-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 All,
I've been using sticky sessions with mod_jk and I can see that there is a bit of a problem when attempting to take a backend Tomcat server out of load-balanced rotation: a user who never (or rarely) restarts their web browser will keep the same JSESSIONID cookie forever and therefore end up with the same backend server whether it has been disabled or not. Quick series of events: 1. User visits load-balancer and gets a randomly-assigned backend server/route. We'll call this route "X". The JSESSIONID cookie set by the backend server is therefore foo.X. 2. User's requests are routed by mod_jk to route X. 3. Route X is disabled using mod_jk's status worker 4. User's session on server X expires. [Technically, 3 and 4 can happen in either order] 5. User makes a new request to the load-balancer, and mod_jk sees the JSESSIONID cookie still set to foo.X. mod_jk sends the request to route X which allows the user to login, etc. Thus, it takes more time than necessary to bleed all the traffic from route X for maintenance, etc. Is there a way for mod_jk to ask route X if the session is *still* valid? It seems that mod_jk will not re-route a request that looks like it's got a valid session id to a new (active) backend server unless the backend server X is actually down. Any ideas? Thanks, - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJToFQqAAoJEBzwKT+lPKRYQgEP/0oIOU1bmm6z0aKlvuW4oVnB 5ozq6hyXCQlpIN1/eORIZdnpz3vkqsFSmsVfyZLpfgJcWjn3yjiKt9M1Ywe9MQyH mezY1Pd5ZJoUfoopHTyw3i2cxeWfvKMJTAe1nZ1XaOHoYc+iYGGrRxDYExQq2CDV V6d55ftH9iFuMADPwcgdWhydap8A0ojeskpKsn6UEV3c1qO8uGMKvDpDb4/bnh1S m5Ri5/Jc8mFnIBQEWOeAIFlUu9VciFQ7XF560ERCAoZ6NGhBVFJjdeEFM1iWprO/ kBawz5IXUAcNHqcZn5CNTvumsQKpGQpw54l2+iUkGUmkbBWrR2CULIzulLLdLnHF BteWdt7qZFWgth7l4nY+SR5MpzNH3NBzzD7Cr+l861OGDzTG+A4rw81B5mS/Hmuf /bsbnnIKeS+uREx1tR/F2+/omhhFaRpleyRFrH+NAEtU7sw1th+HO4mB3eSoioiN xNhk/SsWWsslJH3MrD3Bi/iw3ULp5JYiaLCoD+yX18P06TzBxO7aQBK9LuCU58G4 1gN4rm/2+z33YS9URhEohWDJtTXzIEbwA7g94+oB1eAdPksWy1+0oPz7IAKyzCyb bHZnI+v/D5w9h8lcMwJbfEx7Lg+0vxnAe4PBef6rZfhTynB2tYKsC6U/nFgwwh73 s6N1b1A+N1uKM5Ab62Jl =X1DE -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
