How to fix "FAILED to execute End-2-End Scenario" in Hyperledger Fabric?

Question

I'm trying running up Fabric samples that is provided here: https://github.com/hyperledger/fabric-samples/tree/release-1.2/first-network

I followed all the instructions of Fabric docs from: https://hyperledger-fabric.readthedocs.io/en/release-1.2/build_network.html , but encountered an error "FAILED to execute End-2-End Scenario". Following is the output after I entered ./byfn.sh up in terminal.

I didn't even find any similar problems on google and stackoverflow

./byfn.sh up
Starting for channel 'mychannel' with CLI timeout of '10' seconds and CLI delay of '3' seconds
Continue? [Y/n] Y
proceeding ...
LOCAL_VERSION=1.2.0
DOCKER_IMAGE_VERSION=1.2.0
Starting peer1.org1.example.com ... done
Starting orderer.example.com    ... done
Starting peer0.org2.example.com ... done
Starting peer1.org2.example.com ... done
Starting peer0.org1.example.com ... done
Starting cli                    ... done

 ____    _____      _      ____    _____ 
/ ___|  |_   _|    / \    |  _ \  |_   _|
\___ \    | |     / _ \   | |_) |   | |  
 ___) |   | |    / ___ \  |  _ <    | |  
|____/    |_|   /_/   \_\ |_| \_\   |_|  

Build your first network (BYFN) end-to-end test

Channel name : mychannel
+ peer channel create -o orderer.example.com:7050 -c mychannel -f ./channel-artifacts/channel.tx --tls true --cafile /opt/gopath/src/github.com/hyperledger/fabric/peer/crypto/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem
Creating channel...
+ res=1
+ set +x
Error: failed to create deliver client: orderer client failed to connect to orderer.example.com:7050: failed to create new connection: context deadline exceeded
!!!!!!!!!!!!!!! Channel creation failed !!!!!!!!!!!!!!!!
========= ERROR !!! FAILED to execute End-2-End Scenario ===========

ERROR !!!! Test failed

What's the root of the problem and how should I fixed?

Answer 1

Error: failed to create deliver client: orderer client failed to connect to orderer.example.com:7050: failed to create new connection: context deadline exceeded

This error indicates that peer is not able to resolve / connect to orderer.example.com:7050 . Try checking all containers by

docker ps -a

this will show you all the running containers and the containers which have exited you can check container logs by

docker logs your_container_name

it can also happen if your previous container are running or stopped in same network and you have forgotten to remove it so you can try to bring down whole network and then start again.

./byfn.sh down
./byfn.sh up

Answer 2

I m using windows 10 for solving above error

Firstly run command docker ps -a
then run these two 
./byfn.sh down
./byfn.sh up

Successfully able to resolved.