// asyncPlanWait is used to apply and respond to a plan async
func (s *Server) asyncPlanWait(waitCh chan struct{}, future raft.ApplyFuture,
result *structs.PlanResult, pending *pendingPlan) {
defer metrics.MeasureSince([]string{"nomad", "plan", "apply"}, time.Now())
defer close(waitCh)
// Wait for the plan to apply
if err := future.Error(); err != nil {
s.logger.Printf("[ERR] nomad: failed to apply plan: %v", err)
pending.respond(nil, err)
return
}
// Respond to the plan
result.AllocIndex = future.Index()
pending.respond(result, nil)
}
// asyncPlanWait is used to apply and respond to a plan async
func (s *Server) asyncPlanWait(waitCh chan struct{}, future raft.ApplyFuture,
result *structs.PlanResult, pending *pendingPlan) {
defer metrics.MeasureSince([]string{"nomad", "plan", "apply"}, time.Now())
defer close(waitCh)
// Wait for the plan to apply
if err := future.Error(); err != nil {
s.logger.Printf("[ERR] nomad: failed to apply plan: %v", err)
pending.respond(nil, err)
return
}
// Respond to the plan
result.AllocIndex = future.Index()
// If this is a partial plan application, we need to ensure the scheduler
// at least has visibility into any placements it made to avoid double placement.
// The RefreshIndex computed by evaluatePlan may be stale due to evaluation
// against an optimistic copy of the state.
if result.RefreshIndex != 0 {
result.RefreshIndex = maxUint64(result.RefreshIndex, result.AllocIndex)
}
pending.respond(result, nil)
}
// planWaitFuture is used to wait for the Raft future to complete
func planWaitFuture(future raft.ApplyFuture) (uint64, error) {
if err := future.Error(); err != nil {
return 0, err
}
return future.Index(), nil
}