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Re: Could not read chunk size: connection was closed by server

From: Justin Johnson <justinandtonya_at_gmail.com>
Date: Tue, 22 Nov 2011 09:44:04 -0600

On Fri, Nov 18, 2011 at 3:27 PM, Justin Johnson
<justinandtonya_at_gmail.com> wrote:
> Hi,
> We are running Subversion 1.6.16 and Apache 2.2.17 on Solaris 10, with
> 1.6.12 clients connecting from Windows and various flavors of UNIX.
> For as long as I can remember users on Windows and UNIX clients have
> been getting the following error every once in a while, typically
> during a checkout.
>  Could not read chunk size: connection was closed by server
> In the server logs the following errors appear around the same time.
>  Provider encountered an error while streaming a REPORT response.  [500, #0]
>  A failure occurred while driving the update report editor  [500, #130]
>  Error writing base64 data: Software caused connection abort  [500, #130]
> When the error happens you can generally just do an update in the
> working copy and it will pick up where it left off.
> The frequency of this error has been increasing lately so I'm trying
> again to determine the cause.  Numerous people have posted about it
> online, but none of the solutions have seemed applicable to my
> situation.  For example, there are no signs of too many open file
> descriptors and I have verified that the repositories are not corrupt.
>  The time that it takes for the checkout to fail with this error shows
> no linkage with our timeout settings in Apache as far as I can tell.
> Sometimes it fails after about 20 seconds... other times 180 or so.
> For what it's worth, the only two timeout settings we have are:
> TimeOut 1800
> KeepAliveTimeout 10
> This page seemed potentially related, but I'm not sure.  Our Solaris
> box is actually a Sun zone, so there's some virtualization involved.
> http://pve.proxmox.com/pipermail/pve-user/2009-December/001087.html
> Does anyone have any suggestions?
> Thanks.
> Justin

While researching this problem further I came across
where one user said the following.

   I eventually solved the problem by using the apache2-mpm-prefork package
   rather than the apache2-mpm-worker package

I also found http://serverfault.com/questions/194233/use-prefork-or-worker-in-apache-configuration,
where one user said the following.

   Are you doing things with Apache modules (SVN, PHP are two examples)?
   In that case prefork might be safer.

Is it true that mpm worker is not safe for use with Subversion? Could
that possibly be related to this problem? I see no mention of this in
the svn book or the README or INSTALL files that come with Subversion.
Received on 2011-11-22 16:44:38 CET

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