最大重试次数超过 url 由 NewConnectionError 引起无法建立新连接：[Errno -3] 名称解析暂时失败
Max retries exceeded with url Caused by NewConnectionError Failed to establish a new connection: [Errno -3] Temporary failure in name resolution
我正在使用 python 请求库请求 API：
我的 python 脚本是调度程序每天 运行 一次，一旦 python 脚本得到 运行，我就得到这个错误和python 脚本被终止并显示 OOM。
我不知道是 DNS 问题还是 OOM（内存不足）问题，因为进程正在终止。
之前的脚本运行没问题。
任何 clues/help 都将受到高度赞赏。
Traceback (most recent call last):
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connection.py", line 170, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/util/connection.py", line 73, in create_connection
for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
File "/usr/lib/python3.6/socket.py", line 745, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -3] Temporary failure in name resolution
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 706, in urlopen
chunked=chunked,
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 382, in _make_request
self._validate_conn(conn)
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 1010, in _validate_conn
conn.connect()
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connection.py", line 353, in connect
conn = self._new_conn()
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connection.py", line 182, in _new_conn
self, "Failed to establish a new connection: %s" % e
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPSConnection object at 0x7f163156c160>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/adapters.py", line 449, in send
timeout=timeout
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 756, in urlopen
method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/util/retry.py", line 574, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='<.............>', port=443): Max retries exceeded with url: /api/v2/test_connection/ (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f163156c160>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/ubuntu/pf_cic_etl_script_v2.py", line 50, in <module>
resp = requests.get(url, headers=headers)
File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/api.py", line 76, in get
return request('get', url, params=params, **kwargs)
File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/api.py", line 61, in request
return session.request(method=method, url=url, **kwargs)
File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/sessions.py", line 542, in request
resp = self.send(prep, **send_kwargs)
File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/sessions.py", line 655, in send
r = adapter.send(request, **kwargs)
File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/adapters.py", line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='<...............>', port=443): Max retries exceeded with url: /api/v2/test_connection/ (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f163156c160>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',))
Killed
进程终止日志-
dmesg -T| grep -E -i -B100 'killed process'
[Sat Sep 25 06:08:31 2021] Tasks state (memory values in pages):
[Sat Sep 25 06:08:31 2021] [ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name
[Sat Sep 25 06:08:31 2021] [ 1643] 1000 1643 517804 455512 4157440 0 0 python3
[Sat Sep 25 06:08:31 2021] [ 1651] 0 1651 5954 69 86016 0 0 apport
[Sat Sep 25 06:08:31 2021] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/user.slice,task=python3,pid=1643,uid=1000
[Sat Sep 25 06:08:31 2021] Out of memory: Killed process 1643 (python3) total-vm:2071216kB, anon-rss:1822048kB, file-rss:0kB, shmem-rss:0kB, UID:1000 pgtables:4060kB oom_score_adj:0
我发现了问题，就我而言，这不是 DNS 问题。
该问题与 ec2 实例的 OOM（内存不足）有关，该实例正在终止 python 脚本的进程，因此“实例可达性检查失败”并且我收到“无法建立新连接” : [Errno -3] 名称解析暂时失败。
升级 ec2 实例后，实例可达性没有失败并且能够 运行 python 包含 api.
的脚本
https://aws.amazon.com/premiumsupport/knowledge-center/system-reachability-check/
实例状态检查失败表示实例的可达性存在问题。出现此问题的原因是操作系统级错误，例如：
无法启动操作系统
未能正确安装卷
精疲力尽 CPU 和内存 - 这发生在我们的案例中。
内核崩溃
当我尝试 运行 我的 letsencrypt 脚本时，我的 Hostinger 20 GB VPS 也出现了这样的错误。该问题与磁盘 运行ning out 直接相关。我 运行 下面的命令删除所有 docker 容器并要求 17.4 GB。之后问题已经解决：
sudo docker system prune --all
我正在使用 python 请求库请求 API：
我的 python 脚本是调度程序每天 运行 一次，一旦 python 脚本得到 运行，我就得到这个错误和python 脚本被终止并显示 OOM。 我不知道是 DNS 问题还是 OOM（内存不足）问题，因为进程正在终止。
之前的脚本运行没问题。
任何 clues/help 都将受到高度赞赏。
Traceback (most recent call last):
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connection.py", line 170, in _new_conn
(self._dns_host, self.port), self.timeout, **extra_kw
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/util/connection.py", line 73, in create_connection
for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
File "/usr/lib/python3.6/socket.py", line 745, in getaddrinfo
for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno -3] Temporary failure in name resolution
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 706, in urlopen
chunked=chunked,
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 382, in _make_request
self._validate_conn(conn)
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 1010, in _validate_conn
conn.connect()
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connection.py", line 353, in connect
conn = self._new_conn()
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connection.py", line 182, in _new_conn
self, "Failed to establish a new connection: %s" % e
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPSConnection object at 0x7f163156c160>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/adapters.py", line 449, in send
timeout=timeout
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/connectionpool.py", line 756, in urlopen
method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
File "/home/ubuntu/.local/lib/python3.6/site-packages/urllib3/util/retry.py", line 574, in increment
raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='<.............>', port=443): Max retries exceeded with url: /api/v2/test_connection/ (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f163156c160>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/ubuntu/pf_cic_etl_script_v2.py", line 50, in <module>
resp = requests.get(url, headers=headers)
File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/api.py", line 76, in get
return request('get', url, params=params, **kwargs)
File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/api.py", line 61, in request
return session.request(method=method, url=url, **kwargs)
File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/sessions.py", line 542, in request
resp = self.send(prep, **send_kwargs)
File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/sessions.py", line 655, in send
r = adapter.send(request, **kwargs)
File "/home/ubuntu/.local/lib/python3.6/site-packages/requests/adapters.py", line 516, in send
raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='<...............>', port=443): Max retries exceeded with url: /api/v2/test_connection/ (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7f163156c160>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',))
Killed
进程终止日志-
dmesg -T| grep -E -i -B100 'killed process'
[Sat Sep 25 06:08:31 2021] Tasks state (memory values in pages):
[Sat Sep 25 06:08:31 2021] [ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name
[Sat Sep 25 06:08:31 2021] [ 1643] 1000 1643 517804 455512 4157440 0 0 python3
[Sat Sep 25 06:08:31 2021] [ 1651] 0 1651 5954 69 86016 0 0 apport
[Sat Sep 25 06:08:31 2021] oom-kill:constraint=CONSTRAINT_NONE,nodemask=(null),cpuset=/,mems_allowed=0,global_oom,task_memcg=/user.slice,task=python3,pid=1643,uid=1000
[Sat Sep 25 06:08:31 2021] Out of memory: Killed process 1643 (python3) total-vm:2071216kB, anon-rss:1822048kB, file-rss:0kB, shmem-rss:0kB, UID:1000 pgtables:4060kB oom_score_adj:0
我发现了问题，就我而言，这不是 DNS 问题。 该问题与 ec2 实例的 OOM（内存不足）有关，该实例正在终止 python 脚本的进程，因此“实例可达性检查失败”并且我收到“无法建立新连接” : [Errno -3] 名称解析暂时失败。
升级 ec2 实例后，实例可达性没有失败并且能够 运行 python 包含 api.
的脚本https://aws.amazon.com/premiumsupport/knowledge-center/system-reachability-check/
实例状态检查失败表示实例的可达性存在问题。出现此问题的原因是操作系统级错误，例如：
无法启动操作系统 未能正确安装卷 精疲力尽 CPU 和内存 - 这发生在我们的案例中。 内核崩溃
当我尝试 运行 我的 letsencrypt 脚本时，我的 Hostinger 20 GB VPS 也出现了这样的错误。该问题与磁盘 运行ning out 直接相关。我 运行 下面的命令删除所有 docker 容器并要求 17.4 GB。之后问题已经解决：
sudo docker system prune --all