What are the possible causes of a Timer Thread RTE when all of the timers content are poll-groups?
In this case serial polling is done and a condition is defined on the timer.
Normally the timer will move the poll-groups on the execution queue that is running in the protocol thread. In case executing the group would take too long I would expect a Protocol Thread RTE, not a Timer Thread RTE. So when can this occur?
If I look at a protocol pending call, the timer thread remains in there until the last group it set to execute is finished.
If I recall correctly this is used as a flag so that the timer knows it can start another iteration of adding groups to execute.