Thank you for you answers Antonio,
Yes we have a firewall between tomcat and apache.
Does it means that there is something else to do?
If your firewall is well-behaved, no. There is nothing else to do. However, this is not usually the case. :-(
If your firewall drops idle connections after some time, you will need to tune a couple of settings.
In Apache (workers.properties), set:
worker.something.socket_keepalive=1
In your sysctl settings for the Apache machine, set your tcp keepalive time to a value lower than the drop time of your firewall.
Otherwise, you will bang your head against a wall. And that causes headache ;-)
Antonio Fiol
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