Arch Linux

drt123

Member

Registered: 2015-01-06

Posts: 5

after some uptime some websites take forever to load

hello, i am having a strange problem with the network. after a while (~hours) some webpages (for example google.com and github.com) take forever to load, while other sites remain unaffected.

here is my investigation so far:

the network is a simple home setup, wan -> router (cheap tp-link one) -> host (wired, dhcp)

happens on different machines with similar arch installs, no issues with win7 (on the same machine) and osx

its not a dns issue (ping, dig, nslookup work fine)

it happens regardless of the http client (different browser, curl, even telnet)

tried turning off/on the interface with ip link, doesn't fix it

happens on stock and linux-ck kernel the same

ran strace on curl and telnet a couple times, in case of curl it hangs on a poll after the connect, telnet hangs on the connect

has anyone else ran into this?

thank you

herOldMan

Member

Registered: 2013-10-11

Posts: 154

Re: after some uptime some websites take forever to load

I have seen something similar to this recently, only I had not researched quite as well as you did and I assumed I had a DNS problem (dig was equally non-responsive).

Here's one thing that I did on a whim that seemed to correct the problem. In /etc/resolv.conf I added the line:
options single-request

There was one other instance where I saw a similar problem. In the network, I had created a duplicate machine from a cloned image. It turned out that my original had a static IP assignment, so I did not have unique network addresses.

drt123

Member

Registered: 2015-01-06

Posts: 5

Re: after some uptime some websites take forever to load

thanks for the suggestion, unfortunately doesn't help. like i said, its definately not a dns issue. forcing ipv4, enabling single-request, connecting thru the ip address instead of teh domain name, all the same.

the only thing that helps is a reboot, afaik.

lucke

Member

From: Poland

Registered: 2004-11-30

Posts: 4,018

Re: after some uptime some websites take forever to load

Have you tried unloading and loading the network module?

alphaniner

Member

From: Ancapistan

Registered: 2010-07-12

Posts: 2,810

Re: after some uptime some websites take forever to load

Couldn't hurt to check the logs of your router if possible. It could be that something Arch is doing is causing the router to act up.

---

But whether the Constitution really be one thing, or another, this much is certain - that it has either authorized such a government as we have had, or has been powerless to prevent it. In either case, it is unfit to exist.
-Lysander Spooner

drt123

Member

Registered: 2015-01-06

Posts: 5

Re: after some uptime some websites take forever to load

thank you for the further suggestions

i have tried looking at the router logs, but nothing seems out of the ordinary, the hanging connections don't show up in the logs

i unloaded the module that provides the driver for the nic, but that didn't fix the problem

however, shortly after that i switched from dhcpcd to systemd-networkd.  looks like that solved the problem, the system has been running for 30 hours since, without the issue coming back

i have absolutely no idea how can this be relevant tho, i tried releasing the ip and getting a new one (with dhcpcd), that didn't help. still, maybe of some use to someone :-)