Answering your question:
assuming you have a apache web server proxing the first tomcat with mod_jk
(so mod_jk help),
you shuold have a thread in your second tomcat which interrogate a servlet
in the first tomcat and if the answer fails this thread should reconfigure
the worker (the mod_jk) so that apache web server redirect the requests to
the second tomcat.
Honestly it doesn't seems to me to be a solid solution (what about the
second tomcat crashes too? what about the sessions in the first tomcat?).
A better solution could be clustering:
http://tomcat.apache.org/tomcat-6.0-doc/cluster-howto.html
Also give a try to terracotta to keep save your sessions.
In this case you could also have a typical load balanced cluster with net
balancer.
Regards
Luca Cicale
--------------------------------------------------
From: "Ofer Kalisky" <[EMAIL PROTECTED]>
Sent: Tuesday, August 12, 2008 8:30 AM
To: "Tomcat Users List" <users@tomcat.apache.org>
Subject: [programmazione] Re: Tomcat failover
Is there a reason why no one is answering this?
----- Original Message -----
From: Ofer Kalisky
To: Tomcat Users List
Sent: Monday, August 11, 2008 3:26 PM
Subject: Tomcat failover
Hi,
I have a Tomcat that has a thread that reads entries from a DB and
handles them. In each cycle, it reads all the entries (to a certain
limit). I would like to set up a configuration that has a failover Tomcat,
that when the first one crashes the second starts to read from the same DB
(or a replicated, doesn't matter) and handle entries.
I wouldn't want the second Tomcat to read from the DB, because it would
harm the operation of the first when the first is up. I would like it to
start working only when the first is down...
How can I know in the second Tomcat that the first have crashed? can
mod_jk help?
Thanks.
__________ Information from ESET NOD32 Antivirus, version of virus
signature database 3345 (20080811) __________
The message was checked by ESET NOD32 Antivirus.
http://www.eset.com
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]