isConnected() 凍結並且在 web3.py 中不返回任何內容

我使用：

python3.7、、

web3==4.9.2和

Infura/或own Node。初始化後，它僅在第一次返迴

響應，然後凍結。web3``isConnected()

web3.py:

from web3 import Web3
from web3.gas_strategies.rpc import rpc_gas_price_strategy
from web3.providers.auto import load_provider_from_uri  


class Web3NotAvailableException(Exception):
   def __init__(self, rpc_url):
       self.rpc_url = rpc_url

   def __str__(self):
       return f'WEB3_RPC_URL: {self.rpc_url}'


def get_web3():
   logger.debug('Getting web3 instance')
   if hasattr(get_web3, '_web3_instance'):
       logger.warn('Here 1')
       _web3_instance = getattr(get_web3, '_web3_instance')
   else:
       logger.warn('Here 2')
       _web3_instance = Web3(load_provider_from_uri(settings.WEB3_RPC_URL))
       _web3_instance.eth.setGasPriceStrategy(rpc_gas_price_strategy)
       setattr(get_web3, '_web3_instance', _web3_instance)

   logger.warn('Before isConnected()')
   if not _web3_instance.isConnected():
       logger.warn('Here 3')
       _web3_instance = None
       raise Web3NotAvailableException(settings.WEB3_RPC_URL)

   logger.warn('Finish')
   return _web3_instance

日誌：

DEBUG 07/06/2021 16:30:13 | [ web3.py:46 ] Getting web3 instance
WARNING 07/06/2021 16:30:13 | [ web3.py:51 ] Here 2
WARNING 07/06/2021 16:30:13 | [ web3.py:56 ] Before isConnected()
WARNING 07/06/2021 16:30:13 | [ web3.py:62 ] Finish
DEBUG 07/06/2021 16:30:15 | [ web3.py:46 ] Getting web3 instance
WARNING 07/06/2021 16:30:15 | [ web3.py:48 ] Here 1
WARNING 07/06/2021 16:30:15 | [ web3.py:56 ] Before isConnected()

之後 docker 容器凍結並且什麼也沒有發生。雖然celery應該每 30 秒推送一次任務。

但如果我在本地使用 ganache 一切正常。

DEBUG 07/06/2021 16:59:37 | [ web3.py:46 ] Getting web3 instance
WARNING 07/06/2021 16:59:37 | [ web3.py:51 ] Here 2
WARNING 07/06/2021 16:59:37 | [ web3.py:56 ] Before isConnected()
WARNING 07/06/2021 16:59:37 | [ web3.py:62 ] Finish
################################################
DEBUG 07/06/2021 17:00:11 | [ web3.py:46 ] Getting web3 instance
WARNING 07/06/2021 17:00:11 | [ web3.py:48 ] Here 1
WARNING 07/06/2021 17:00:11 | [ web3.py:56 ] Before isConnected()
WARNING 07/06/2021 17:00:11 | [ web3.py:62 ] Finish
################################################
DEBUG 07/06/2021 17:00:41 | [ web3.py:46 ] Getting web3 instance
WARNING 07/06/2021 17:00:41 | [ web3.py:48 ] Here 1
WARNING 07/06/2021 17:00:41 | [ web3.py:56 ] Before isConnected()
WARNING 07/06/2021 17:00:41 | [ web3.py:62 ] Finish

怎麼了？

我將web3初始化移至設置文件，現在它已初始化一次，並且我已經獲得了 web3-result Celery：

設置/生產.py：

from web3 import Web3
from web3.gas_strategies.rpc import rpc_gas_price_strategy
from web3.providers.auto import load_provider_from_uri
from django.conf import settings

from eth_watcher.web3 import Web3NotAvailableException


##################
# different variables here
##################

def get_web3():
   _web3_instance = Web3(load_provider_from_uri(settings.WEB3_RPC_URL))
   _web3_instance.eth.setGasPriceStrategy(rpc_gas_price_strategy)

   if not _web3_instance.isConnected():
       _web3_instance = None
       raise Web3NotAvailableException(settings.WEB3_RPC_URL)

   return _web3_instance


W3 = get_web3() 

web3.py:

class Web3NotAvailableException(Exception):
   def __init__(self, rpc_url):
       self.rpc_url = rpc_url

   def __str__(self):
       return f'WEB3_RPC_URL: {self.rpc_url}'


def get_web3():
   return settings.W3

引用自：https://ethereum.stackexchange.com/questions/101501