From bd2c54fa9f16d57d6158496351da43e3caf66c87 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A9ter=20Szil=C3=A1gyi?= <peterke@gmail.com>
Date: Sun, 9 Apr 2017 20:12:46 +0300
Subject: [PATCH] eth: announce block after sync cycle (star topology)
---
eth/sync.go | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/eth/sync.go b/eth/sync.go
index f2cae6c19..68d3afdb8 100644
--- a/eth/sync.go
+++ b/eth/sync.go
@@ -189,7 +189,15 @@ func (pm *ProtocolManager) synchronise(peer *peer) {
return
}
atomic.StoreUint32(&pm.synced, 1) // Mark initial sync done
-
+ if head := pm.blockchain.CurrentBlock(); head.NumberU64() > 0 {
+ // We've completed a sync cycle, notify all peers of new state. This path is
+ // essential in star-topology networks where a gateway node needs to notify
+ // all its out-of-date peers of the availability of a new block. This failure
+ // scenario will most often crop up in private and hackathon networks with
+ // degenerate connectivity, but it should be healthy for the mainnet too to
+ // more reliably update peers or the local TD state.
+ go pm.BroadcastBlock(head, false)
+ }
// If fast sync was enabled, and we synced up, disable it
if atomic.LoadUint32(&pm.fastSync) == 1 {
// Disable fast sync if we indeed have something in our chain
--
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