Hyperledger Composer运行时安装报错：No valid responses from any peers咨询

Hey there, let's break down the possible issues behind that frustrating error you're hitting. Since you've already got 3 nodes successfully joined to the channel, here are the most probable culprits to investigate:

• Peer connectivity problems across physical machines
  First up, confirm your business network cards are enabling proper communication between the two physical hosts. Test if peers can reach each other by pinging the opposite machine's IP, and use telnet <peer-ip> 7051 to check if the peer's gRPC port is open and accessible. Also, make sure all peer containers are actually running—run docker ps on each machine to verify none have crashed or are stuck in a restart loop.

• Incorrect PeerAdmin connection profile settings
  The PeerAdmin@fabric-network connection profile might have wrong endpoints for your peers. Open the profile file (usually at ~/.composer-connection-profiles/fabric-network/connection.json) and double-check that every peer's address uses the actual public IP of its physical machine—not localhost or internal Docker IPs (those won't work across separate hosts). Also, ensure the TLS certificate paths in the profile point to valid, matching certs for each peer; mismatched or missing certs will block communication.

• Incomplete channel sync or membership issues
  Even though you saw nodes join the channel, it's possible a peer hasn't fully synced the channel ledger. Try running peer channel fetch config -o <orderer-ip>:7050 -c <your-channel-name> --tls --cafile <path-to-orderer-ca-cert> on the problematic peer—if this fails, the peer might not have properly completed the channel join process. You can also check the ledger height with peer channel getinfo -c <your-channel-name>; if it's 0 or doesn't match other peers, there's a sync problem.

• Version mismatch between Composer and Fabric
  Hyperledger Composer is picky about matching Fabric versions. For example, Composer v0.20.x pairs with Fabric v1.3.x, while older Composer versions won't work with newer Fabric releases. Double-check that your installed versions are compatible—cross-reference the official compatibility details you have on hand.

• Firewall or network policy blocks
  Both physical machines might have local OS firewalls or network-level firewalls blocking the ports peers use (typically 7051 for gRPC, 7053 for event hubs). Try temporarily disabling the firewalls to test, or add explicit rules allowing inbound/outbound traffic on those ports. If you're on a corporate or cloud network, check for security groups or network policies that might be restricting cross-machine communication.

• Docker network misconfiguration
  Since you're using separate physical hosts, each peer container needs to be accessible externally. Make sure your Docker setup uses host network mode or correctly publishes the peer ports to the host machine (e.g., adding -p 7051:7051 in the docker run command or docker-compose file). If you're using the default bridge network, containers might not be reachable from the other machine.

内容的提问来源于stack exchange，提问作者Susie Song