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discovery/sync_manager: Pause/Resume HistoricalSyncTicker

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This gives each initial historical syncer an equal amount of time before
being rotated, even if some fail.
This commit is contained in:
Conner Fromknecht 2021-01-29 00:13:26 -08:00
parent ef0cd82c1f
commit 9e932f2a64
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GPG Key ID: E7D737B67FA592C7
1 changed files with 12 additions and 5 deletions
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17
discovery/sync_manager.go
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@ -198,7 +198,6 @@ func (m *SyncManager) syncerHandler() {
m.cfg.RotateTicker.Resume()
defer m.cfg.RotateTicker.Stop()
m.cfg.HistoricalSyncTicker.Resume()
defer m.cfg.HistoricalSyncTicker.Stop()
var (
@ -214,9 +213,17 @@ func (m *SyncManager) syncerHandler() {
initialHistoricalSyncSignal chan struct{}
)
setHistoricalSyncer := func(s *GossipSyncer) {
setInitialHistoricalSyncer := func(s *GossipSyncer) {
initialHistoricalSyncer = s
initialHistoricalSyncSignal = s.ResetSyncedSignal()
// Restart the timer for our new historical sync peer. This will
// ensure that all initial syncers recevie an equivalent
// duration before attempting the next sync. Without doing so we
// might attempt two historical sync back to back if a peer
// disconnects just before the ticker fires.
m.cfg.HistoricalSyncTicker.Pause()
m.cfg.HistoricalSyncTicker.Resume()
}
for {
@ -302,7 +309,7 @@ func (m *SyncManager) syncerHandler() {
// keep track of the corresponding syncer to properly
// handle disconnects. We'll also use a signal to know
// when the historical sync completed.
setHistoricalSyncer(s)
setInitialHistoricalSyncer(s)
// An existing peer has disconnected, so we'll tear down its
// corresponding GossipSyncer.
@ -341,7 +348,7 @@ func (m *SyncManager) syncerHandler() {
"GossipSyncer(%v) with GossipSyncer(%x)",
staleSyncer.peer, s.cfg.peerPub)
setHistoricalSyncer(s)
setInitialHistoricalSyncer(s)
// Our initial historical sync signal has completed, so we'll
// nil all of the relevant fields as they're no longer needed.
@ -401,7 +408,7 @@ func (m *SyncManager) syncerHandler() {
// where our previous historical sync peer did not
// respond to our queries and we haven't ingested as
// much of the graph as we should.
setHistoricalSyncer(s)
setInitialHistoricalSyncer(s)
case <-m.quit:
return