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diff --git a/archives/extend/2013-April/000089.html b/archives/extend/2013-April/000089.html new file mode 100644 index 00000000..dad65559 --- /dev/null +++ b/archives/extend/2013-April/000089.html @@ -0,0 +1,86 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<HTML> + <HEAD> + <TITLE> [99s-extend] cowboy and chromium + </TITLE> + <LINK REL="Index" HREF="index.html" > + <LINK REL="made" HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20cowboy%20and%20chromium&In-Reply-To=%3C51657A11.7070902%40ninenines.eu%3E"> + <META NAME="robots" CONTENT="index,nofollow"> + <style type="text/css"> + pre { + white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ + } + </style> + <META http-equiv="Content-Type" content="text/html; charset=us-ascii"> + <LINK REL="Previous" HREF="000087.html"> + <LINK REL="Next" HREF="000090.html"> + </HEAD> + <BODY BGCOLOR="#ffffff"> + <H1>[99s-extend] cowboy and chromium</H1> + <B>Loïc Hoguin</B> + <A HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20cowboy%20and%20chromium&In-Reply-To=%3C51657A11.7070902%40ninenines.eu%3E" + TITLE="[99s-extend] cowboy and chromium">essen at ninenines.eu + </A><BR> + <I>Wed Apr 10 16:41:21 CEST 2013</I> + <P><UL> + <LI>Previous message: <A HREF="000087.html">[99s-extend] cowboy and chromium +</A></li> + <LI>Next message: <A HREF="000090.html">[99s-extend] cowboy and chromium +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#89">[ date ]</a> + <a href="thread.html#89">[ thread ]</a> + <a href="subject.html#89">[ subject ]</a> + <a href="author.html#89">[ author ]</a> + </LI> + </UL> + <HR> +<!--beginarticle--> +<PRE>On 04/10/2013 02:00 PM, Sasa Juric wrote: +><i> Hi, +</I>><i> +</I>><i> I have recently in my production system replaced mochiweb with cowboy. The server generally works fine, except for a bizarre behavior which I cannot quite explain, so I post here, hoping to get some pointers. +</I>><i> +</I>><i> After replacing mochiweb with cowboy, I noticed that in chromium (other major browsers work fine) often (but not always) a request lasts a little more than a minute. Further inspection in <A HREF="chrome://net-internals">chrome://net-internals</A> showed that browser tries to send a request, times out after 60 sec, retries and then succeeds immediately. The key point is that it doesn't happen always. First couple of requests work fine, then all of a sudden one doesn't work. At the same time requests from other browsers (including chrome) on the same machine work fine. +</I>><i> +</I>><i> If I revert to mochiweb, the problem disappears. Other than web server related code, everything else is the same: the rest of my code, the server setup etc... In addition, I return same responses and headers in both versions. +</I>><i> +</I>><i> After many attempts and failures, I might have worked around the issue. Namely, I included <<"connection">>, <<"close">> in all responses. After this change, it seems that long requests are not occurring. In any case, I can't reproduce it anymore, whereas before the change I could have reproduce it easily. +</I>><i> +</I>><i> However, I'm not sure if I have really resolved the issue, I'm also not happy with connection closes since it degrades performance. And finally, I'm not sure if I quite understand the problem. +</I>><i> The only theory I have is that due to keep-alive, chromium holds the connection, while cowboy closes it (I read somewhere that hardcoded timeout is 5 seconds, right?). In this case it might happen that chromium sends a request to a non existing socket and then hangs for a minute, waiting for the response which never arrives. +</I>><i> This might further be amplified by the fact that in production, between browser and cowboy, there is a proxy/load balancer, so maybe load balancer still holds the connection despite the fact that server had closed it. +</I>><i> +</I>><i> This is the only theory I currently have, and I would like to hear if you guys have some other idea or any kind of helpful pointer? +</I> +Haven't seen this happen on plain Cowboy. The proxy might be the +culprit. See if you can reproduce without the proxy. + +-- +Loïc Hoguin +Erlang Cowboy +Nine Nines +<A HREF="http://ninenines.eu">http://ninenines.eu</A> + +</PRE> + +<!--endarticle--> + <HR> + <P><UL> + <!--threads--> + <LI>Previous message: <A HREF="000087.html">[99s-extend] cowboy and chromium +</A></li> + <LI>Next message: <A HREF="000090.html">[99s-extend] cowboy and chromium +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#89">[ date ]</a> + <a href="thread.html#89">[ thread ]</a> + <a href="subject.html#89">[ subject ]</a> + <a href="author.html#89">[ author ]</a> + </LI> + </UL> + +<hr> +<a href="https://lists.ninenines.eu/listinfo/extend">More information about the Extend +mailing list</a><br> +</body></html> |