Error: Max retries exceeded with url appear when using web3.py

Question

Here is my code:

from web3 import Web3, HTTPProvider, IPCProvider

web3 = Web3(HTTPProvider('http://localhost:8545'))

print(web3.eth.blockNumber)

Below is the error:

requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=8545): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x10d8951d0>: Failed to establish a new connection: [Errno 61] Connection refused',))

Am I doing something wrong? Thanks all

Answer 1

requests.exceptions.ConnectionError: HTTPConnectionPool(host='localhost', port=8545): Max retries exceeded with url: / (Caused by NewConnectionError(': Failed to establish a new connection: [Errno 61] Connection refused',))

Seems to be ipc is running in different port/ip. Check with g/eth client.

Answer 2

All we can tell from the information provided in the question is that there is no server responding at http://localhost:8545.

This could be a variety of problems. Some common problems are:

• The node was never started
• The node was started, but it's not on the same computer as Web3.py (ie~ not on localhost)
• The node is local, and started, but without the arguments needed to start the HTTP server
• The node is local, started, and serving HTTP, but serving on a port other than 8545