Add the scheduler option HeartbeatInterval #956
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scheduler.go
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| @@ -317,7 +335,7 @@ func (s *Scheduler) beat() { | |||
| entries = append(entries, e) | |||
| } | |||
| s.logger.Debugf("Writing entries %v", entries) | |||
| if err := s.rdb.WriteSchedulerEntries(s.id, entries, 5*time.Second); err != nil { | |||
| if err := s.rdb.WriteSchedulerEntries(s.id, entries, s.heartbeatInterval); err != nil { | |||
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From the original issue:
scheduler entries are prone to expire when redis is slow to respond
Even though this just affects the inspector, there is a small chance that the SchedulerEntries may be empty because they expired before the next beat ran. I would propose it to be such that redisKey ttl > beat tick to reduce the chance of the entries being empty at any given time.
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Absolutely, I did not want to tackle this in the same PR, but I think we should have ttl = s.heartbeatInterval * 2.
I don't have strong opinions on this, what option do you prefer:
ttl = s.heartbeatInterval * 2ttl = s.heartbeatInterval + time.Second- Or a second option
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ttl = s.heartbeatInterval * 2
This sounds good.
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Context
From #510:
Redo of #896
Fixes #510
Changes
SchedulerOpts.HeartbeatInterval