watt.art.clusteredPollingNotification.keepAliveInterval - frequency, in milliseconds, with which a secondary instance will check to see if an executing instance is still alive. If not set, the secondary instance will change to the default maxLockDuration value of "180000" for the shared cache.

watt.art.clusteredPollingNotification.keepAliveExpireTimeout - amount of time, in milliseconds, that an executing node can be late before it is assumed to have failed. In general, this setting should be equal to the amount of drift anticipated on the server clocks. If not set, the secondary instance will change to the default maxLockDuration value of "180000" for the shared cache.