start pv60 sync after 10sec delay

libethereum/BlockChainSync.cpp

@@ -298,10 +298,12 @@ void BlockChainSync::onPeerNewBlock(std::shared_ptr<EthereumPeer> _peer, RLP con
 		case ImportResult::UnknownParent:
 		{
 			logNewBlock(h);
-			clog(NetMessageDetail) << "Received block with no known parent. Resyncing...";
 			u256 totalDifficulty = _r[1].toInt<u256>();
 			if (totalDifficulty > _peer->m_totalDifficulty)
+			{
+				clog(NetMessageDetail) << "Received block with no known parent. Resyncing...";
 				resetSyncFor(_peer, h, totalDifficulty);
+			}
 			break;
 		}
 		default:;

libethereum/BlockChainSync.h

@@ -58,6 +58,9 @@ public:
 	/// @returns true is Sync is in progress
 	virtual bool isSyncing() const = 0;
 
+	/// Restart sync
+	virtual void restartSync() = 0;
+
 	/// Called by peer to report status
 	virtual void onPeerStatus(std::shared_ptr<EthereumPeer> _peer);
 
@@ -92,9 +95,6 @@ protected:
 	/// Resume downloading after witing state
 	virtual void continueSync() = 0;
 
-	/// Restart sync
-	virtual void restartSync() = 0;
-
 	/// Called after all blocks have been donloaded
 	virtual void completeSync() = 0;
 

libethereum/EthereumHost.cpp

@@ -88,6 +88,7 @@ void EthereumHost::reset()
 	if (m_sync)
 		m_sync->abortSync();
 	m_sync.reset();
+	m_syncStart = 0;
 
 	m_latestBlockSent = h256();
 	Guard tl(x_transactions);
@@ -115,6 +116,21 @@ void EthereumHost::doWork()
 
 	foreachPeer([](std::shared_ptr<EthereumPeer> _p) { _p->tick(); return true; });
 
+	if (m_syncStart)
+	{
+		Guard l(x_sync);
+		if (!m_sync)
+		{
+			time_t now = std::chrono::system_clock::to_time_t(chrono::system_clock::now());
+			if ((now - m_syncStart) > 10)
+			{
+				m_sync.reset(new PV60Sync(*this));
+				m_syncStart = 0;
+				m_sync->restartSync();
+			}
+		}
+	}
+
 //	return netChange;
 	// TODO: Figure out what to do with netChange.
 	(void)netChange;
@@ -259,7 +275,14 @@ BlockChainSync* EthereumHost::sync()
 			pv61 = true;
 		return !pv61;
 	});
-	m_sync.reset(pv61 ? new PV61Sync(*this) : new PV60Sync(*this));
+	if (pv61)
+	{
+		m_syncStart = 0;
+		m_sync.reset(new PV61Sync(*this));
+	}
+	else if (!m_syncStart)
+		m_syncStart = std::chrono::system_clock::to_time_t(chrono::system_clock::now());
+
 	return m_sync.get();
 }
 

libethereum/EthereumHost.h

@@ -138,6 +138,7 @@ private:
 	mutable Mutex x_transactions;
 	DownloadMan m_man;
 	std::unique_ptr<BlockChainSync> m_sync;
+	std::atomic<time_t> m_syncStart = { 0 };
 };
 
 }