ServiceUnavailable: 503服务的DNS解析失败: firestore.googleapis.com
我试图在我的项目中使用Python代码(在Jupyter Notebook中)访问Google的Firestore，但由于某种原因，Python程序永远不会结束。我还试图在Firestore中创建一个文档，但是我得到了这个错误：
ServiceUnavailable: 503 DNS resolution failed for service: firestore.googleapis.com我在Firestore中创建了一个服务帐户(ServiceAccount.json包含这些设置)。这是我的代码：
import firebase_admin
from firebase_admin import credentials
from firebase_admin import firestore
cred = credentials.Certificate('ServiceAccount.json')
firebase_admin.initialize_app(cred)
db = firestore.client()
db.collection('company').add({'name': 'Test'})只有最后一条语句失败。这也会被返回：
_InactiveRpcError Traceback (most recent call last)
C:\ProgramData\Anaconda3\lib\site-packages\google\api_core\grpc_helpers.py in error_remapped_callable(*args, **kwargs)
65 try:
---> 66 return callable_(*args, **kwargs)
67 except grpc.RpcError as exc:
C:\ProgramData\Anaconda3\lib\site-packages\grpc\_channel.py in __call__(self, request, timeout, metadata, credentials, wait_for_ready, compression)
945 wait_for_ready, compression)
--> 946 return _end_unary_response_blocking(state, call, False, None)
947
C:\ProgramData\Anaconda3\lib\site-packages\grpc\_channel.py in _end_unary_response_blocking(state, call, with_call, deadline)
848 else:
--> 849 raise _InactiveRpcError(state)
850
_InactiveRpcError: <_InactiveRpcError of RPC that terminated with:
status = StatusCode.UNAVAILABLE
details = "DNS resolution failed for service: firestore.googleapis.com"
debug_error_string = "{"created":"@1632831473.221000000","description":"Resolver transient failure","file":"src/core/ext/filters/client_channel/client_channel.cc","file_line":1356,"referenced_errors":[{"created":"@1632831473.221000000","description":"DNS resolution failed for service: firestore.googleapis.com","file":"src/core/ext/filters/client_channel/resolver/dns/native/dns_resolver.cc","file_line":202,"grpc_status":14,"referenced_errors":[{"created":"@1632831473.221000000","description":"OS Error","file":"src/core/lib/iomgr/resolve_address_windows.cc","file_line":93,"os_error":"The specified class was not found.\r\n","syscall":"getaddrinfo","wsa_error":10109}]}]}"
>
The above exception was the direct cause of the following exception:
ServiceUnavailable Traceback (most recent call last)
C:\ProgramData\Anaconda3\lib\site-packages\google\api_core\retry.py in retry_target(target, predicate, sleep_generator, deadline, on_error)
189 try:
--> 190 return target()
191
...回答 1
Stack Overflow用户
发布于 2021-09-29 15:05:12
您使用的是Windows吗？如果你是，我相信你已经命中了bug。虽然c-ares解析器问题已修复，但您可能正在使用较旧的软件包。
您可以通过检查已配置的环境变量来解决此问题。如果您在某个Jupyter Notebook单元格中运行此命令：
import os
os.environ你应该得到一个很长的变量列表。看看GRPC_DNS_RESOLVER是什么：
environ{'SHELL': '/bin/bash',
'OS_IMAGE_FAMILY': 'debian-10',
'CONDA_EXE': '/opt/conda/bin/conda',
'_CE_M': '',
'DL_ANACONDA_HOME': '/opt/conda',根据documentation的说法
GRPC_DNS_RESOLVER声明要使用哪个DNS解析器。如果gRPC是使用c-ares支持构建的，则默认值为ares。否则，此环境变量的值将被忽略。可用的DNS解析器包括: ares (除iOS、Android或Node之外的大多数平台上的默认解析器)-一个基于c-are库原生的DNS解析器-一个基于getaddrinfo()的DNS解析器，创建一个新线程来执行名称解析
然后，可以像这样将GRPC_DNS_RESOLVER设置为native：
os.environ['GRPC_DNS_RESOLVER'] = 'native'https://stackoverflow.com/questions/69361854
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