Hyperledger fabcar sample fabric error sendPeersProposal - Promise is rejected Error Connect Failed

The problem is with the connection.

First, find out the IP address of the system:

$ ifconfig

Then replace localhosts in query.js with IP that you found with the previous command

Example:

@@ -12,7 +12,7 @@ var options = { user_id: 'PeerAdmin', channel_id: 'mychannel', chaincode_id: 'fabcar', network_url: 'grpc://:7051', };