Number of retries for failed timers is controlled by the system property

org.jbpm.timer.thread.retries

This property seems to apply to all timers.

It would be useful to be able to specify the number of retries for each specific timer in a BPM process, as well as the delay between one retry and another.

This property is valid only for ThreadPool scheduler but it could be useful to control the retries regardless of the scheduler in use