Re: [rules-users] Drools 5.1 Flow in a "Clustered" environment

Ken, In Drools, timers etc. are linked to a session (where the session can contain process instances, timers, data, rule evaluations, etc.). So, even if you are using Drools Flow in a clustered environment, where you could have a number of independent sessions running simultaneously, the timer will always be associated to that session. There are two possible strategies then: either (1) you keep the session online for ever (your cluster has a number of running sessions and you're possibly using persistence to restore in case of system failure), and the timers will fire in that session only when the time is right or (2) you only keep your session alive when it is necessary so sessions can go offline, where you could then use a scheduler to make sure the session is brought back online (from persistent storage) whenever a timer should fire in an offline session. The latter is currently being implemented as a community contribution. Kris Ken Young wrote: