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eth: randomly fetch announced block (don't hammer origin)

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This commit is contained in:
Péter Szilágyi 2015-06-10 12:30:35 +03:00
parent b9affbf9fe
commit 355b1e3bb1
1 changed files with 5 additions and 4 deletions
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9
eth/sync.go
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@ -127,7 +127,7 @@ func (pm *ProtocolManager) txsyncLoop() {
// fetcher is responsible for collecting hash notifications, and periodically
// checking all unknown ones and individually fetching them.
func (pm *ProtocolManager) fetcher() {
announces := make(map[common.Hash]*blockAnnounce)
announces := make(map[common.Hash][]*blockAnnounce)
request := make(map[*peer][]common.Hash)
pending := make(map[common.Hash]*blockAnnounce)
cycle := time.Tick(notifyCheckCycle)
@ -139,7 +139,7 @@ func (pm *ProtocolManager) fetcher() {
// A batch of hashes the notified, schedule them for retrieval
glog.V(logger.Debug).Infof("Scheduling %d hash announcements from %s", len(notifications), notifications[0].peer.id)
for _, announce := range notifications {
announces[announce.hash] = announce
announces[announce.hash] = append(announces[announce.hash], announce)
}
case <-cycle:
@ -150,8 +150,9 @@ func (pm *ProtocolManager) fetcher() {
}
}
// Check if any notified blocks failed to arrive
for hash, announce := range announces {
if time.Since(announce.time) > notifyArriveTimeout {
for hash, all := range announces {
if time.Since(all[0].time) > notifyArriveTimeout {
announce := all[rand.Intn(len(all))]
if !pm.chainman.HasBlock(hash) {
request[announce.peer] = append(request[announce.peer], hash)
pending[hash] = announce