Add peer to the local routing table failed when discovery to boot nodes

[alexzhou8090]

1、Problem

because of add peer to the local routing table failed, it will throw error "ENR has no UDP socket to connect to" in storage node discovery service.

2024-06-05T10:47:27.342571Z DEBUG network::service: Loaded network key from disk.
2024-06-05T10:47:27.347435Z DEBUG network::discovery::enr: ENR loaded from disk file="network/enr.dat"
2024-06-05T10:47:27.350018Z INFO network::nat: UPnP Attempting to initialise routes
2024-06-05T10:47:27.350025Z INFO network::service: Libp2p Starting peer_id=16Uiu2HAmV1thBhRkR4UxeTsZvAf8TPYjaAKYat52uhEXj8sPHRUD bandwidth_config=3-Average
2024-06-05T10:47:27.350046Z DEBUG network::service: Attempting to open listening ports address=0.0.0.0 tcp_port=1234 udp_port=1234
2024-06-05T10:47:27.370063Z INFO network::discovery: ENR Initialised enr=enr:-Hy4QHLFbV8sgroNoC-98OKLalUx77VkpSqEPi3zWEz5ifAyammhtQ72BXkjNBWol1nqDJBeRBQLrfVtr1BwHmS9S9ABgmlkgnY0iXNlY3AyNTZrMaED8xXKnGEjsaedRV7svbQn_bCXih-xmdtFpcnqsxVz4WqDdGNwggTS seq=1 id=0x1c57..c52d ip=None udp=None tcp=Some(1234) udp4_socket=None
2024-06-05T10:47:27.375388Z DEBUG network::discovery: Discovery service started
2024-06-05T10:47:27.375396Z INFO network::discovery: Contacting Multiaddr boot-nodes for their ENR
2024-06-05T10:47:27.375451Z DEBUG discv5::handler: Handler Starting
2024-06-05T10:47:27.375456Z DEBUG discv5::socket::recv: Recv handler starting
2024-06-05T10:47:27.375473Z DEBUG discv5::socket::send: Send handler starting
2024-06-05T10:47:27.375498Z INFO discv5::service: Discv5 Service started
2024-06-05T10:47:27.377093Z DEBUG discv5::service: Sending RPC Request: id: 541cedb93aed7b3d: FINDNODE Request: distance: [0] to node: Node: 0xc909..1134, addr: 54.219.26.22:1234
2024-06-05T10:47:27.377117Z DEBUG discv5::service: Sending RPC Request: id: d93684dc33f63c9f: FINDNODE Request: distance: [0] to node: Node: 0x3ec9..8916, addr: 52.52.127.117:1234
2024-06-05T10:47:27.461357Z DEBUG discv5::service: Received RPC response: NODES: total: 1, Nodes: [ENR: NodeId: 0xc909..1134, IpV4 Socket: None IpV6 Socket: None] to request: FINDNODE Request: distance: [0] from: Node: 0xc909..1134, addr: 54.219.26.22:1234
2024-06-05T10:47:27.461455Z DEBUG network::discovery: Adding node to routing table node_id=0xc909..1134 peer_id=16Uiu2HAmTVDGNhkHD98zDnJxQWu3i1FL1aFYeh9wiQTNu4pDCgps ip=None udp=None tcp=Some(1234)
2024-06-05T10:47:27.461479Z WARN discv5::discv5: ENR attempted to be added without a UDP socket has been ignored
2024-06-05T10:47:27.461485Z ERROR network::discovery: Could not add peer to the local routing table addr=/ip4/54.219.26.22/udp/1234/p2p/16Uiu2HAmTVDGNhkHD98zDnJxQWu3i1FL1aFYeh9wiQTNu4pDCgps error=ENR has no UDP socket to connect to
2024-06-05T10:47:27.461617Z DEBUG discv5::service: Received RPC response: NODES: total: 1, Nodes: [ENR: NodeId: 0x3ec9..8916, IpV4 Socket: None IpV6 Socket: None] to request: FINDNODE Request: distance: [0] from: Node: 0x3ec9..8916, addr: 52.52.127.117:1234
2024-06-05T10:47:27.461682Z DEBUG network::discovery: Adding node to routing table node_id=0x3ec9..8916 peer_id=16Uiu2HAkzRjxK2gorngB1Xq84qDrT4hSVznYDHj6BkbaE4SGx9oS ip=None udp=None tcp=Some(1234)
2024-06-05T10:47:27.461697Z WARN discv5::discv5: ENR attempted to be added without a UDP socket has been ignored
2024-06-05T10:47:27.461700Z ERROR network::discovery: Could not add peer to the local routing table addr=/ip4/52.52.127.117/udp/1234/p2p/16Uiu2HAkzRjxK2gorngB1Xq84qDrT4hSVznYDHj6BkbaE4SGx9oS error=ENR has no UDP socket to connect to

2、Config info

• modified: blockchain_rpc_endpoint value with local validator rpc endpoint
• others with default value

3、Enviroment

• 0.2.0 branch