Apache/Windows served files wrap at 65536 bytes

I have an installation of Apache 2.0.53 running under Windows 2000
SP-4. It serves small files fine, but any files larger than 64K (65536
bytes), are corrupted. Specifically, instead of serving the 65537th
byte, it loops back to the first byte of the file. I have seen the
problem both with html files and with binary files (Microsoft Office
documents).

The httpd.conf is fresh "out of the box" except for setting up paths
and aliases. I am pretty new at administering web servers. Am I doing
something dreadfully wrong, or is this a bug in Apache or Windows?
What can I do to fix it?

I had the same problem with version 2.0.52.

--Dan Menes

On 23 Feb 2005, "Dan Menes" <dan.menes@bateswhite.com> wrote in
news:1109181597.607052.8030@l41g2000cwc.googlegrou ps.com:

> I have an installation of Apache 2.0.53 running under Windows 2000
> SP-4. It serves small files fine, but any files larger than 64K
> (65536 bytes), are corrupted. Specifically, instead of serving
> the 65537th byte, it loops back to the first byte of the file. I
> have seen the problem both with html files and with binary files
> (Microsoft Office documents).

I've heard of similar problems caused by Zone Alarm. Do you run it or
another software firewall?

No. The "server" is a laptop that is used on a protected network, and
has no firewall software that I'm aware of.

Some additional information. I have now tried several versions of
Apache, and they don't all behave the same. 1.3.33 works correctly. I
have found no version of 2.0 that works. Versions 2.0.42 and later
versions behave as I described, recycling after 65536 bytes. Version
2.0.40 simply truncates the file at 65536 bytes. Version 2.0.36
truncates the file at exactly 40k (0xa000 bytes). Does this give
anyone any clues?

--Dan


Dan Menes wrote:
> I have an installation of Apache 2.0.53 running under Windows 2000
> SP-4. It serves small files fine, but any files larger than 64K
(65536
> bytes), are corrupted. Specifically, instead of serving the 65537th
> byte, it loops back to the first byte of the file. I have seen the
> problem both with html files and with binary files (Microsoft Office
> documents).
>
> The httpd.conf is fresh "out of the box" except for setting up paths
> and aliases. I am pretty new at administering web servers. Am I
doing
> something dreadfully wrong, or is this a bug in Apache or Windows?
> What can I do to fix it?
>
> I had the same problem with version 2.0.52.
>
> --Dan Menes

Problem solved!!

Putting the line

EnableSenfile Off

in httpd.conf fixes the problem. Still don't know what the cause was.

--Dan

On 24 Feb 2005, "Dan Menes" <dan.menes@bateswhite.com> wrote in
news:1109284715.187038.321940@f14g2000cwb.googlegr oups.com:

> Problem solved!!
>
> Putting the line
>
> EnableSenfile Off

Yay!

> in httpd.conf fixes the problem. Still don't know what the cause
> was.

I don't have that line in mine, and I don't see it listed in the docs.
Where did it come from?