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< Yaws mailing list ~ yaws_server:gserv_loop/1 goes into spindo_acc |
| Guest |
 Posted: Tue Dec 05, 2006 10:56 pm |
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Guest
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Mikael Karlsson wrote:
> I have a problem when doing a yaws_api:setconf in R11B on sparc_solaris. I do
> not know the root cause yet but I can see that the funs
> yaws_server:gserv_loop and acceptor0 goes into a infinite loop when the
> do_accept in acceptor0 returns with an error ({error,einval}).
>
> gserv_loop enters the clause:
>
> {_From, next} when Ready == [] ->
> New = acceptor(GS),
> gserv_loop(GS, Ready, Rnum, New);
>
> the call to acceptor spawns a process with fun acceptor0, which first calls
> do_accept and then sends {self(), next} back to the gserv_loop which calls
> acceptor again, and so forth. Since do_accept returns immediately with an
> error everything goes into a spin.
>
> acceptor0(GS, Top) ->
> ?TC([{record, GS, gs}]),
> put(gc, GS#gs.gconf),
> X = do_accept(GS),
> Top ! {self(), next},
>
> I guess that there should be another handling of this when do_accept returns
> with an error.
Hmmm, the (TM) right behaviour if accept fails is ... probably
to try to accept() again. Anybody's got an opinion on that ?
In your case, I think the loop stems from
fault embedded mode configs. einval is the reason, the args to accept
are somehow weird.
You need to debug this, stage 1 would be to print out the
arg to accept()
/klacke
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| Guest |
| Posted: Wed Dec 06, 2006 9:50 am |
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Guest
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Tue 05 december 2006 23:55 Claes Wikstrom wrote:
> Hmmm, the (TM) right behaviour if accept fails is ... probably
> to try to accept() again. Anybody's got an opinion on that ?
>
>
> In your case, I think the loop stems from
> fault embedded mode configs. einval is the reason, the args to accept
> are somehow weird.
>
> You need to debug this, stage 1 would be to print out the
> arg to accept()
>
>
> /klacke
Well it is a bit more tricky here.
First:
Everything works fine on R10, but not on R11 (I have only tested R11B on
Sparc-Solaris so far).
Second:
I am not running in embedded mode, instead I first call yaws_api:getconf, and
then I only modify the SConfs part:
insert(Yapps) when is_list(Yapps) ->
{ok, Gconf, Sconfs} = yaws_api:getconf(),
NewSconfs = (catch insert_yapps_in_sconfs(Yapps, Sconfs)),
yaws_api:setconf(Gconf, NewSconfs).
It is gen_tcp:accept(GS#gs.l) in do_accept that returns {errror,einval} and
the argument GS#gs.l is an Erlang port. When things go into spin I can see
that it is called with the same port id all the time, which is logical since
GS do not change in the gserv_loop clause that is used:
{_From, next} when Ready == [] ->
New = acceptor(GS),
gserv_loop(GS, Ready, Rnum, New);
I agree more debugging is needed to get to the root cause though.
/Mikael
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