In some situations, it is desirable to have the keepalive option enabled for all TCP socket connections. For instance, when a firewall times out connections that have been idle for too long.

We propose to add the ability to enble the keepalive from the JPPF configuration, using a boolean property like "jppf.socket.keepalive = true" with a default to false.

Note that in the case of connections timing out because of a firewall setting/rule, the keepalive interval (by default 2 hours) will need to be configured as well, this is normally done at the OS level only.