HTTPConnectionPool(host='192.168.8.1', port=80): Max retries exceeded with url: / (Caused by ConnectTimeoutError(, ' Connection to 192.168.8.1 timed out. (connect timeout=2)'))Īnd with the remote destination: > start_time = time.monotonic() HTTPConnectionPool(host='192.168.7.11', port=80): Max retries exceeded with url: / (Caused by ConnectTimeoutError(, ' Connection to 192.168.7.11 timed out. Let’s try adjusting the timeout now with the basic timeout argument in requests.get(): > start_time = time.monotonic() I also run this same scenario on a Debian 10 Buster server (with kernel 4.19) and there the timeout happened at about 30 seconds.
Python error errno 110 connection timed out mac#
(Btw: No ARP request/response was shown because the host already had the local router MAC address in the cache.) And finally the stack gave up at about 130 seconds of total waiting. In this case the TCP stack did its usual attempts with exponentially increased delay between the attempts (1, 2, 4, 8, 16 and ~32 seconds). The second example was a remote destination that was not responding because the destination IP was incorrect or firewall blocked the requests, or some other error happened that prevented any response. The socket call timed out already in three seconds (even though the host networking stack continued attempting the ARP requests for another two seconds). The first example was about connection attempt to a host in the local subnet but the destination host did not exist, thus no ARP response.
And it was the nnect() call that down there returned an error when error/nothing happened with the connection attempts. What actually happened is that requests used services from urllib3, which used services from http.client, which in turn used services from socket. With another operating system/kernel the results can/will be different. Note: The test host here was a Debian 11 Bullseye server, with a Linux kernel from 5.10 series. HTTPConnectionPool(host='192.168.8.1', port=80): Max retries exceeded with url: / (Caused by NewConnectionError(': Failed to establish a new connection: Connection timed out'))Īs we can see, without any timeout defined in the requests.get() call there definitely was timeout involved.
> print(round(stop_time-start_time, 2), "seconds")Īnother: > start_time = time.monotonic() HTTPConnectionPool(host='192.168.7.11', port=80): Max retries exceeded with url: / (Caused by NewConnectionError(': Failed to establish a new connection: No route to host')) I have two examples here (the statements have been pasted from a text editor so there is no user input latency in the time calculation), the first one: > import time
This post demonstrates different ways to handle those situations.īut first, let’s see how it actually looks like when we don’t have timeout configured. Depending on the nature of the application this is not desirable. It means that in specific circumstances a simple requests.get() call might not return at all. By default it doesn’t define any timeouts for the operations. The most usual way of making HTTP/HTTPS requests in Python applications is using the requests library.
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