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Fixes race condition at genesis (#5016)

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* fixes race condition at genesis
This commit is contained in:
Victor Farazdagi 2020-03-06 00:20:38 +03:00 committed by GitHub
parent 6158a648cd
commit b4aaa610a1
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 7 additions and 2 deletions
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3
beacon-chain/blockchain/receive_attestation.go
View File

@ -73,10 +73,11 @@ func (s *Service) IsValidAttestation(ctx context.Context, att *ethpb.Attestation
}
// This processes attestations from the attestation pool to account for validator votes and fork choice.
func (s *Service) processAttestation() {
func (s *Service) processAttestation(subscribedToStateEvents chan struct{}) {
// Wait for state to be initialized.
stateChannel := make(chan *feed.Event, 1)
stateSub := s.stateNotifier.StateFeed().Subscribe(stateChannel)
subscribedToStateEvents <- struct{}{}
<-stateChannel
stateSub.Unsubscribe()

6
beacon-chain/blockchain/service.go
View File

@ -137,6 +137,9 @@ func (s *Service) Start() {
}
}
// Make sure that attestation processor is subscribed and ready for state initializing event.
attestationProcessorSubscribed := make(chan struct{}, 1)
// If the chain has already been initialized, simply start the block processing routine.
if beaconState != nil {
log.Info("Blockchain data already exists in DB, initializing...")
@ -183,6 +186,7 @@ func (s *Service) Start() {
stateChannel := make(chan *feed.Event, 1)
stateSub := s.stateNotifier.StateFeed().Subscribe(stateChannel)
defer stateSub.Unsubscribe()
<-attestationProcessorSubscribed
for {
select {
case event := <-stateChannel:
@ -203,7 +207,7 @@ func (s *Service) Start() {
}()
}
go s.processAttestation()
go s.processAttestation(attestationProcessorSubscribed)
}
// processChainStartTime initializes a series of deposits from the ChainStart deposits in the eth1