LND graph sync (Removing GossipSyncer)

Services Support
1

I’ve been trying to get my LND synced to graph for days now. I’ve just now tried to bootstrap it to multiple peers. However am getting this error message. I have added a lot of peers and a couple minutes later RTL is showing I have 0 peers. I don’t know if the below log is happening for every peer, but it happened for the last one I added…

2025-10-02T13:34:38+00:00  2025-10-02 13:34:38.243 [ERR] SRVR: Unable to connect to 03037e8d29a12587c1ee3bce09cec069b19543de8a76bb3764f794ae45c78757bc@172.31.10.200:9736: dial proxy failed: dial tcp 172.31.10.200:9736: i/o timeout
2025-10-02T13:34:38+00:00  2025-10-02 13:34:38.243 [ERR] RPCS: [connectpeer]: error connecting to peer: dial proxy failed: dial tcp 172.31.10.200:9736: i/o timeout
2025-10-02T13:34:38+00:00  2025-10-02 13:34:38.243 [ERR] RPCS: [/lnrpc.Lightning/ConnectPeer]: dial proxy failed: dial tcp 172.31.10.200:9736: i/o timeout
2025-10-02T13:34:45+00:00  2025-10-02 13:34:45.418 [INF] GRPH: Processed channels=293 updates=450 nodes=94 in last 1m0.009397888s
2025-10-02T13:35:10+00:00  2025-10-02 13:35:04.865 [WRN] PEER: Peer(034ea80f8b148c750463546bd999bf7321a0e6dfc60aaf84bd0400a2e8d376c0d5): pong response failure for 034ea80f8b148c750463546bd999bf7321a0e6dfc60aaf84bd0400a2e8d376c0d5@213.174.156.79:9735: timeout while waiting for pong response. Time waited for this pong: 30.003769812s. Last successful RTT: 24.033982317s. -- disconnecting
2025-10-02T13:35:10+00:00  2025-10-02 13:35:04.866 [INF] PEER: Peer(034ea80f8b148c750463546bd999bf7321a0e6dfc60aaf84bd0400a2e8d376c0d5): disconnecting 034ea80f8b148c750463546bd999bf7321a0e6dfc60aaf84bd0400a2e8d376c0d5@213.174.156.79:9735, reason: pong failure: timeout while waiting for pong response
2025-10-02T13:35:10+00:00  2025-10-02 13:35:04.866 [INF] MSGX: Stopping Router
2025-10-02T13:35:10+00:00  2025-10-02 13:35:04.966 [INF] DISC: Removing GossipSyncer for peer=034ea80f8b148c750463546bd999bf7321a0e6dfc60aaf84bd0400a2e8d376c0d5

Thanks fellers

2

I’d recommend following this guide, using the LND & RTL path to open your first channel.

After you start LND at step 6, just proceed to step 8. It may not finish the sync to graph until you’ve connected a peer.

3

I was under the impression that all you had to do was add a peer, no need to open a channel. Is this wrong? I keep adding peers and they keep getting removed.

4

I’ve just tried to open a channel with the Start9 node. It is showing error message that the peer is not online. I believe this error and the log means there is some sort of network issue. Any ideas?

5

Any channel I open, RTL says “Opening Channel” until eventually it times out and says the peer is not online.

6

This depends on what you are trying to do. Most people run a lightning node so they can use lightning. In which case, you need channels. If all you need it for, is so the mempool service can observe lightning data, then yes you are correct. You don’t need to open a channel.

7

So let me catch up. Did you follow the guide I pointed to? If so, it sounds like you’re stuck at step 20, correct?

What is the address of the node, you are entering here?

8

Correct, stuck at step 20. I have added a lot of different addresses including official Start9 one, ACINQ, Binance… a lot more. Tor and clearnet. They all add and then eventually they time out for some reason and they are removed. I cannot open a channel with anyone. Some sort of connection problem I believe.

9

What are you entering in the box for connecting to Start9HQ?

10

025d28dc4c4f5ce4194c31c3109129cd741fafc1ff2f6ea53f97de2f58877b2295@imw3e76e5jfeorav2gzb5gtt4vy7cdqu27ayhut6hneefis7dwgccoqd.onion:9735

11

Everything I understand you’re doing, looks right to me. I can only conclude that you’re not having a server or LND issue, but a network issue. Start by power cycling all of your network equipment, and attempt to connect to the peer you posted again. If it still fails, I’d spend some time looking at firewall, or other network configuration. Something is blocking your connection to peers.