Re: Error From "art work" on Vanilla Artanis Project

[Nala Ginrut]

Hi Jaft!
I found there's illogical bug in epoll module, please try 
fix/epoll-exists-check branch:
https://gitlab.com/NalaGinrut/artanis/-/commit/9d2338401cf422f7e22c4b5686d77e77a8a95fb4

If it works then I'll merge ASAP.

To someone who wants to learn about this bug, here's a brief
description.

When a new connection event comes in, the server core (Ragnarok) will
check if it's already in epoll event set:
- yes: Then there should be a existing task and we restore it. But if no task, 
then we
just drop it. This is the part which raised the error by illogical checking.
- no: Create a new task for this connection.

Thanks for the report!

Best regards.

Jaft writes:

>  Hey, Nala!
> I've actually been running that each time, just to be safe.
> But it's not an old codebase I'm trying out; I downloaded the most recent 
> version of Artanis. ran "art create test", then ran "cd test", and then ran 
> "art work --refresh" and keep having this exact behavior.
> I didn't think this could be a cause of anything but, in case it's helpful, I 
> am running it off of a Raspberry Pi, this time.
> Jonathan    On Monday, February 17, 2020, 6:02:10 AM EST, Nala Ginrut 
> <address@hidden> wrote:
>
>
> Hi Jaft!
> If you upgrade Artanis then please run `art work --refresh` at least
> once to make sure all your webapp code been recompiled with the latest
> Artanis.
>
> You may take a look at the NOTE in the manual:
> https://www.gnu.org/software/artanis/manual/manual.html#orga8bda39
>
> Best regards.
>
>
> Jaft writes:
>
>>  Actually, it looks like the first call just hangs (sometimes, until it 
>> eventually times out) and a second call is what produces the error.
>> I know, in older versions, just generating a project and running it would 
>> produce a page that says an index file should be provided but that Artanis 
>> was up and running but I don't know if things have changed, on that front, 
>> since last I tried out Artanis and I now need to provide initial files for 
>> things to work out of the gate.
>> Jonathan
>>    On Saturday, February 15, 2020, 2:45:45 PM CST, Jaft <address@hidden> 
>> wrote:
>>
>>  I had recently downloaded the most recent release of Artanis and was just 
>> trying to get a generated project to run (no additional edits – other than 
>> changing the port –, like enabling database usage or the like).
>> However, trying to hit the running project results in this error:
>>
>> Loading conf/artanis.conf...done.Session with SIMPLE backend init 
>> done!Loading models...Loading controllers...Loading restful 
>> API...Regenerating route cache ...Server core: 
>> ragnarokhttp://127.0.0.1:1234Anytime you want to quit just try Ctrl+C, 
>> thanks!Backtrace:          11 (apply-smob/1 #<catch-closure ff83d0>)In 
>> ice-9/boot-9.scm:    705:2 10 (call-with-prompt _ _ #<procedure 
>> default-prompt-handle…>)In ice-9/eval.scm:    619:8  9 (_ #(#(#<directory 
>> (guile-user) 1052910>)))In /usr/bin/art:    42:12  8 (_ _ _)In 
>> artanis/commands/work.scm:    144:8  7 (work . _)In 
>> artanis/server/ragnarok.scm:  630:10  6 (establish-http-gateway _)  450:27  
>> 5 (ragnarok-http-gateway-run _)    420:6  4 (get-one-request-from-clients 
>> #<r6rs:record:ragnarok-p…> …)    218:4  3 (fill-ready-queue-from-service _ 
>> #<r6rs:record:ragnarok…>)In ice-9/boot-9.scm:  260:13  2 (for-each 
>> #<procedure 12f0060 at artanis/server/ragnar…> …)In 
>> artanis/server/ragnarok.scm:  245:16  1 (_ (0 . 1))In 
>> artanis/server/epoll.scm:    220:4  0 (exists-in-epoll? 15 0)
>> artanis/server/epoll.scm:220:4: In procedure exists-in-epoll?:Throw to key 
>> `artanis-err' with args `(500 #<procedure epoll-ctl (epfd op fd event #:key 
>> check-exists?)> "~a: ~a" (15 2 0 #f "Bad file descriptor") (9))'.
>>
>> I can't make out the cause so I thought I'd ask.
>> Thank you for any help!
>> Jonathan


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