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Re: [mv] The Mysterious (Periodic) Disappearance of Minivend...
Mike H.,
If you are reading this, or if anyone else knows, could you
give a quick answer to the question below.
First, I read the following in the docs:
-----SNIP----
> SafeSignals
> NOTE: This directive no longer applies as of MiniVend 3.12.
>
> If your operating system does not have a re-entrant C library that
> can guarantee that signal race conditions will not occur, then set
> this to NO. BSDI and FreeBSD libraries are NOT safe, and SafeSignals
> will automatically be disabled for those operating systems.
> In general, if MiniVend ever just ``hangs'', particularly if you can see a
> perl.core file, disable this directive.
>
-----SNIP----
Question: What mechanism in 3.12 (and above) is supposed to prevent this
problem on these systems?
Thanks,
Kyle Cook (KC)
At 06:53 PM 10/24/99 -0700, you wrote:
>****** message to minivend-users from Wes Zuber <wes@uia.net> ******
>
>Kyle,
>
>I am March's boss. I am the system admin here and like you I am pulling my
hair
>out with this one. We are willing to participate in whatever way possible to
>solve the problem. We will try the -D option and report what we find. It
seems
>unlikely that the problem is with the OS since we are running BSDI and
have the
>same problem as you, with FreeBSD.
>
>--Wes
>
>
>On Sat, 23 Oct 1999, you wrote:
>> ****** message to minivend-users from "kyle@invisio.com"
><kyle@invisio.com> ******
>>
>> March and anyone else interested,
>>
>> After scouring the mail archive, I came across what could be
>> (at least for me) the problem. It has to do with forking.
>>
>> I have been running the minivend server for 30+ hours now
>> (before it would crash several times a day)
>> without a crash by starting it like:
>>
>> minivend -D -serve
>>
>> This does stop minivend from using fork to spawn new servers
>> so this is not a "fix" but while I work on the problem, it does keep
>> the store open. Fortunately it is the only domain on a fast new
>> server so it is keeping up pretty well.
>>
>> >From what I read, it looks like it is a problem with either the OS or
>> a perl library that has to do with USR1, USR2 which helps minivend
>> keep track of how many servers are running (and I assume that when
>> minivend gets hit hard, it looses track and ends up killing itself).
>>
>> I am paying someone now to look over this problem and will report
>> back when we've figured out exactly where the problem is (and
>> hopefully the solution)
>>
>> Latter,
>> Kyle Cook (KC)
>>
>> At 06:48 PM 10/22/99 -0500, you wrote:
>> >****** message to minivend-users from "kyle@invisio.com"
>> ><kyle@invisio.com> ******
>> >
>> >What is the most in depth debug level for starting minivend
>> >with -D option?
>> >
>> >The reason is I started minivend like:
>> >
>> >minivend -D -serve >> logall.txt &
>> >
>> >And I want to be sure to grab everything possible from debug
>> >to see if I can pinpoint exactly where minivend is dying.
>> >
>> >I do have checkstat.sh running every 5 minutes and it does work,
>> >but I really want to find out why it is dying in the first place because
>> >I don't want it to die in the middle of a real time credit card purchase
>> >(IE customers card gets charged, but system crashes, so no record
>> >made in minivend)
>> >
>> >I am willing to pay, if someone is familiar with this type of problem,
>> >please send an email to me kyle@invisio.com with a quote to look
>> >into it.
>> >
>> >(Perl 5.005_03, Apache 1.3.9, FreeBSD3.2 and Minivend 3.12)
>> >
>> >Thanks,
>> >Kyle Cook (KC)
>> >
>> >
>> >
>> >At 11:07 AM 10/22/99 -0500, you wrote:
>> >>****** message to minivend-users from "kyle@invisio.com"
>> >><kyle@invisio.com> ******
>> >>
>> >>March,
>> >>
>> >>I am also having the exact same problem with a new install.
>> >>
>> >>I have minivend installed on one system and it has run for 6 months
>> >>with multiple catalogs without ever dying on its own
>> >>(not including the occasional server reboot):
>> >>Perl 5.005_02, Apache 1.3.3, FreeBSD2.2.8 and Minivend 3.12
>> >>
>> >>
>> >>The new server is set up as follows:
>> >>Perl 5.005_03, Apache 1.3.9, FreeBSD3.2 and Minivend 3.12
>> >>with only 1 catalog (although it is a busy one)
>> >>and it dies randomly with no errors anywhere.
>> >>
>> >>There are no "watchdogs" killing it, as I own both servers and have root
>> >>access.
>> >>Can anyone shed some light?
>> >>
>> >>Kyle Cook (KC)
>> >>
>> >>At 07:16 PM 10/21/99 -0700, you wrote:
>> >>>****** message to minivend-users from March Rosenbluth
>> <march@uia.net>
>> >>> ******
>> >>>
>> >>>
>> >>>Greetings!
>> >>>
>> >>> I've encountered a strange problem in my use of Minivend.
>Periodically --
>> >>>ranging from an hour to several days -- Minivend just disappears. A
>> >>>restart shows it unable to find a running instance, giving the error
that
>> >>>tells you to try killing it to see if it stopped normally. None of the
>> >>>error logs show any comment at all -- the catalog specific one has two
>> >>>errors in it which repeat over and over but happen frequently without
>> >>>causing the problem and show no sign of being related. Just in case,
>they
>> >>>are as follows:
>> >>>
>> >>>193.149.76.206 bI3FeJSQ:193.149.76.206 - [21/October/1999:13:45:16
-0700]
>> >>>simple /cgi-bin/simple/process Custom shipping field 'weight' doesn't
>> >>>exist. Returning 0
>> >>>150.176.206.67 xujbI3Fe:150.176.206.67 - [21/October/1999:13:46:24
-0700]
>> >>>simple /cgi-bin/simple/process Bad search column 'code'
>> >>>
>> >>>The minivend error log doesn't show a thing -- it shows the catalog
being
>> >>>started up, and then nothing until it's started again. The apache error
>> >>>log is currently completely blank.
>> >>>
>> >>> We are using Perl 5.005, Apache 1.34, BSDI 4.01, and Minivend 3.14-3,
>and
>> >>>are running only one catalog, which is based on the simple catalog. I
>saw
>> >>>in the archives that there was apparently a similar problem with earlier
>> >>>versions of Minivend and BDSI together, but I couldn't find any
>solutions.
>> >>> Any help would be appreciated. Thanks very much!
>> >>>
>> >>> -- March
>> >>>-
>>
>> -
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