[erlang-questions] Cowboy - cowboy_req:reply

Loïc Hoguin <>
Tue Aug 2 09:34:25 CEST 2016


The error log says the error happens in filename:absname/1, probably 
here: 
https://github.com/erlang/otp/blob/maint/lib/stdlib/src/filename.erl#L69

You'll need to investigate when it happens again. Perhaps someone can 
help you, on a quick glance it seems the error could come from the port 
driver. I have no experience in that area.

Cheers,

On 08/01/2016 11:53 PM, Theepan wrote:
> Also wanted to share that the server is running on a VM instance and the
> OS is CentOS 7.
>
> When I restarted the node every thing started working fine. When this
> happens next time, I would also problem if the node itself is prevented
> from accessing the file system.
>
>
> On Tue, Aug 2, 2016 at 3:17 AM, Theepan <
> <mailto:>> wrote:
>
>     Now when I probed what happens during the 500 error, I see the
>     following error in the Erlang logs.
>
>     Ranch listener http had connection process started with
>     cowboy_protocol:start_link/4 at <0.2399.0> exit with reason:
>     {cowboy_handler,[{class,error},{reason,{badmatch,{error,enoent}}},{mfa,{cowboy_static,init,2}},{stacktrace,[{filename,absname,1,[{file,"filename.erl"},{line,68}]},{cowboy_static,init_dir,3,[{file,"../src/cowboy_static.erl"},{line,82}]},{cowboy_handler,execute,2,[{file,"../src/cowb
>
>     But all the files are present in the server, and their read access
>     rights have not changed.
>
>     Do you have a quick guess?
>
>
>
>     On Tue, Aug 2, 2016 at 3:11 AM, Loïc Hoguin <
>     <mailto:>> wrote:
>
>         Never heard of it but feel free to open a ticket with more details.
>
>         If there's a 500 error then there's probably a related log sent
>         to error_logger.
>
>         On 08/01/2016 11:39 PM, Theepan wrote:
>
>             I noticed another issue with Cowboy. When it comes to static
>             files, once
>             or twice a day they fail to deliver with "500 - Internal
>             Server Error".
>             Dynamics pages are working fine.
>
>             Is there any any issue?
>
>             When the server (Erlang Node) is restarted, things work fine
>             back, then
>             after about 10 hours or so again the same pattern recurred.
>             Unless you
>             restart the node, the error is persistent.
>
>
>
>             On Tue, Aug 2, 2016 at 12:28 AM, Loïc Hoguin
>             < <mailto:>
>             <mailto: <mailto:>>> wrote:
>
>                 No, 2.0.0-pre.3 and below are pretty similar to 1.0.4 in
>             terms of
>                 known bugs (for the same features).
>
>                 Anything in between is anyone's guess.
>
>                 On 08/01/2016 06:20 PM, Theepan wrote:
>
>                     Great Loïc..
>
>                     Were there any serious bugs in 2.0.0-pre.2 ?
>
>                     On Mon, Aug 1, 2016 at 8:58 PM, Loïc Hoguin
>             < <mailto:>
>                     <mailto: <mailto:>>
>                     <mailto:
>             <mailto:> <mailto:
>             <mailto:>>>> wrote:
>
>                         No!
>
>                         I am finishing up changes to what will be
>             released as
>                     2.0.0-pre.4. I
>                         will start recommending this version which,
>             although it won't be
>                         finished, should be pretty close to the final
>             interface.
>
>                         It'll be out before the end of summer.
>
>                         On 08/01/2016 05:01 PM, Max Lapshin wrote:
>
>                             Btw, is it time to convert all production
>             code to cowboy2?
>
>
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>
>                         --
>                         Loïc Hoguin
>                         http://ninenines.eu
>                         Author of The Erlanger Playbook,
>                         A book about software development using Erlang
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>
>                 --
>                 Loïc Hoguin
>                 http://ninenines.eu
>                 Author of The Erlanger Playbook,
>                 A book about software development using Erlang
>
>
>
>         --
>         Loïc Hoguin
>         http://ninenines.eu
>         Author of The Erlanger Playbook,
>         A book about software development using Erlang
>
>
>

-- 
Loïc Hoguin
http://ninenines.eu
Author of The Erlanger Playbook,
A book about software development using Erlang


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