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Posted to dev@subversion.apache.org by Ayende Rahien <ay...@gmail.com> on 2005/05/13 01:43:29 UTC
Denial of service using SVNServe on WinXp
Here is the scenario, I've a WinXP Pro computer that I used to run SVN &
CruiseControl.Net. I started to get a lot of broken build emails, all of
them pointing the blame to SVN connectivity (the message was: "the target
machine actively refused the connection"). The CC.Net & SVN are on the same
machine.
After investigating a little bit, I found out that after a while, it seems
that all attempts to connect to the svnserve (which is running as a service
using svnservice) failed. Trying to test that, I wrote the following batch
script:
@echo off
set /a Count = 1
:start
echo Trying for the #%Count%
Set /A Count=%Count%+1
svn log -v -r "{2005-04-29T17:03:05Z}:{2005-05-01T06:30:16Z}" --xml
--non-interactive svn://localhost/nqa/ > recent%Count%.txt
if errorlevel = 1 goto exit
goto start
:exit
I run this thingie, and at iteration 1200 - 1500, I get a machine shutdown!
I mean a hard shutdown, the kind where you need to push the power button to
restart!
I've no idea what is causing this, but I'm able to reproduce it reliably.
There is nothing else that runs on this machine, btw.
Any ideas ??
RE: Denial of service using SVNServe on WinXp
Posted by Ayende Rahien <ay...@gmail.com>.
Service Pack 2
-----Original Message-----
From: John Szakmeister [mailto:john@szakmeister.net]
Sent: Friday, May 13, 2005 8:34 AM
To: dev@subversion.tigris.org
Subject: Re: Denial of service using SVNServe on WinXp
On Thursday 12 May 2005 21:43, Ayende Rahien wrote:
> Here is the scenario, I've a WinXP Pro computer that I used to run SVN
> & CruiseControl.Net. I started to get a lot of broken build emails, all
> of them pointing the blame to SVN connectivity (the message was: "the
> target machine actively refused the connection"). The CC.Net & SVN are
> on the same machine.
Out of curiousity, which XP Pro? Retail? SP1? SP2?
-John
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Re: Denial of service using SVNServe on WinXp
Posted by John Szakmeister <jo...@szakmeister.net>.
On Thursday 12 May 2005 21:43, Ayende Rahien wrote:
> Here is the scenario, I've a WinXP Pro computer that I used to run SVN
> & CruiseControl.Net. I started to get a lot of broken build emails, all
> of them pointing the blame to SVN connectivity (the message was: "the
> target machine actively refused the connection"). The CC.Net & SVN are
> on the same machine.
Out of curiousity, which XP Pro? Retail? SP1? SP2?
-John
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RE: Denial of service using SVNServe on WinXp
Posted by David Wood <ob...@panix.com>.
Yeah, it would have been lucky if you had a log message, but I'm not
surprised there wasn't one.
If the app works fine on another computer, and your failure is a system
crash, not an app crash, then you're looking at a lower-level problem, and
all that that entails:
1) Windows problem (they still happen)
2) Conflict with another app (antivirus?)
3) Driver problem (and you have a lot of drivers; disk, mobo, network,
etc)
4) Hardware problems, i.e. heat
5) power supply
6) RAM
7) HD
8) NIC
9) motherboard
10) CPU (yes, even a CPU can give you intermittent or load-related
failures)
11) Etc. This is just off the top of my head.
If you have a test that reliably reproduces a problem, you're in great
shape. If you're in a hurry, you can just give up and switch to a machine
that works. If you want to fix the machine you have, that's easy too, if a
bit more time-consuming. Prioritize the list of possible problems in order
of likelihood and start swapping, eliminating them one by one, and you
will find it eventually.
On Fri, 13 May 2005, Ayende Rahien wrote:
> I tried it on my laptop, and it got to 4800 before I got tired of it.
> However, there isn't anything in the logs of the computer that gives the
> error.
>
> Beyond that, can you suggest a reason why sometimes (on multiply computers),
> the repository would stop responding, causing builds failures?
>
> -----Original Message-----
> From: David Wood [mailto:obsidian@panix.com]
> Sent: Friday, May 13, 2005 3:48 PM
> To: Mark Parker
> Cc: Ayende Rahien; users@subversion.tigris.org
> Subject: Re: Denial of service using SVNServe on WinXp
>
> Agreed.
>
> Two suggestions:
>
> 1) Try this on another machine, preferably a different model/manufacturer.
>
> 2) Check your system event log; see if you're seeing any
> SMART/network/system/etc. type errors. Probably not, but you never know.
>
> On Fri, 13 May 2005, Mark Parker wrote:
>
>> In general, userspace programs can't create the sort of problems you're
>> seeing ("hard" lockups). It it almost certainly a problem with the kernel,
> a
>> driver, or your hardware.
>>
>> I'm guessing you have a bad nic, or a bad driver for it. It's also
> possible
>> you have bad memory or something else such as a processor (fan working?)
> or
>> chipset problem.
>>
>> As an example, Blizzard's recent online game World of Warcraft uses a
>> bittorrent system to distribute patches. For some reason it exercises NICs
>
>> enough to bring out bugs in some drivers. Specifically, some netgear cards
>
>> and some linksys cards with certain driver versions will exibit the sort
> of
>> behavior you're seeing.
>>
>> Mark
>>
>> Ayende Rahien wrote:
>>> Here is the scenario, I've a WinXP Pro computer that I used to run SVN &
>>> CruiseControl.Net. I started to get a lot of broken build emails, all of
>>> them pointing the blame to SVN connectivity (the message was: "the target
>
>>> machine actively refused the connection"). The CC.Net & SVN are on the
> same
>>> machine.
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: users-unsubscribe@subversion.tigris.org
>> For additional commands, e-mail: users-help@subversion.tigris.org
>>
>
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RE: Denial of service using SVNServe on WinXp
Posted by Ayende Rahien <ay...@gmail.com>.
I tried it on my laptop, and it got to 4800 before I got tired of it.
However, there isn't anything in the logs of the computer that gives the
error.
Beyond that, can you suggest a reason why sometimes (on multiply computers),
the repository would stop responding, causing builds failures?
-----Original Message-----
From: David Wood [mailto:obsidian@panix.com]
Sent: Friday, May 13, 2005 3:48 PM
To: Mark Parker
Cc: Ayende Rahien; users@subversion.tigris.org
Subject: Re: Denial of service using SVNServe on WinXp
Agreed.
Two suggestions:
1) Try this on another machine, preferably a different model/manufacturer.
2) Check your system event log; see if you're seeing any
SMART/network/system/etc. type errors. Probably not, but you never know.
On Fri, 13 May 2005, Mark Parker wrote:
> In general, userspace programs can't create the sort of problems you're
> seeing ("hard" lockups). It it almost certainly a problem with the kernel,
a
> driver, or your hardware.
>
> I'm guessing you have a bad nic, or a bad driver for it. It's also
possible
> you have bad memory or something else such as a processor (fan working?)
or
> chipset problem.
>
> As an example, Blizzard's recent online game World of Warcraft uses a
> bittorrent system to distribute patches. For some reason it exercises NICs
> enough to bring out bugs in some drivers. Specifically, some netgear cards
> and some linksys cards with certain driver versions will exibit the sort
of
> behavior you're seeing.
>
> Mark
>
> Ayende Rahien wrote:
>> Here is the scenario, I've a WinXP Pro computer that I used to run SVN &
>> CruiseControl.Net. I started to get a lot of broken build emails, all of
>> them pointing the blame to SVN connectivity (the message was: "the target
>> machine actively refused the connection"). The CC.Net & SVN are on the
same
>> machine.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@subversion.tigris.org
> For additional commands, e-mail: users-help@subversion.tigris.org
>
---------------------------------------------------------------------
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Re: Denial of service using SVNServe on WinXp
Posted by David Wood <ob...@panix.com>.
Agreed.
Two suggestions:
1) Try this on another machine, preferably a different model/manufacturer.
2) Check your system event log; see if you're seeing any
SMART/network/system/etc. type errors. Probably not, but you never know.
On Fri, 13 May 2005, Mark Parker wrote:
> In general, userspace programs can't create the sort of problems you're
> seeing ("hard" lockups). It it almost certainly a problem with the kernel, a
> driver, or your hardware.
>
> I'm guessing you have a bad nic, or a bad driver for it. It's also possible
> you have bad memory or something else such as a processor (fan working?) or
> chipset problem.
>
> As an example, Blizzard's recent online game World of Warcraft uses a
> bittorrent system to distribute patches. For some reason it exercises NICs
> enough to bring out bugs in some drivers. Specifically, some netgear cards
> and some linksys cards with certain driver versions will exibit the sort of
> behavior you're seeing.
>
> Mark
>
> Ayende Rahien wrote:
>> Here is the scenario, I've a WinXP Pro computer that I used to run SVN &
>> CruiseControl.Net. I started to get a lot of broken build emails, all of
>> them pointing the blame to SVN connectivity (the message was: "the target
>> machine actively refused the connection"). The CC.Net & SVN are on the same
>> machine.
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@subversion.tigris.org
> For additional commands, e-mail: users-help@subversion.tigris.org
>
---------------------------------------------------------------------
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Re: Denial of service using SVNServe on WinXp
Posted by Mark Parker <ma...@msdhub.com>.
In general, userspace programs can't create the sort of problems you're
seeing ("hard" lockups). It it almost certainly a problem with the
kernel, a driver, or your hardware.
I'm guessing you have a bad nic, or a bad driver for it. It's also
possible you have bad memory or something else such as a processor (fan
working?) or chipset problem.
As an example, Blizzard's recent online game World of Warcraft uses a
bittorrent system to distribute patches. For some reason it exercises
NICs enough to bring out bugs in some drivers. Specifically, some
netgear cards and some linksys cards with certain driver versions will
exibit the sort of behavior you're seeing.
Mark
Ayende Rahien wrote:
> Here is the scenario, I've a WinXP Pro computer that I used to run SVN &
> CruiseControl.Net. I started to get a lot of broken build emails, all of
> them pointing the blame to SVN connectivity (the message was: "the
> target machine actively refused the connection"). The CC.Net & SVN are
> on the same machine.
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