Lighttpd 1.4.22/PHP 5.2.9 hardlocking the system

[Jacob Myers]

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Hello,

I'm running lighttpd 1.4.22 and PHP 5.2.9 on FreeBSD 7.2-RELEASE. When
uploading files > 1 MB in size or so via PHP, the box then hard locks.
SSH and HTTP become unavailable, and apparently console logins don't
work; however, the box can still be pinged. So far I've been able to
reproduce this issue on FreeBSD/i386 and FreeBSD/amd64.

I have no clue how to debug this, but I'm willing to help :). Sadly, I
don't have physical access to a FreeBSD machine atm to help debug this
with, but I'm working on that.

- -- Jacob
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[Steven Hartland]

We had issues when running lighttpd which indicated an issue with kqueue.

Disabling lightttpd's use of kqueue using the following prevented this.
server.event-handler = "poll"

In the logger term we have moved to nginx.

Regards
Steve

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[Jacob Myers]

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Steven Hartland wrote:
> We had issues when running lighttpd which indicated an issue with kqueue.

After doing some experimentation of my own in VirtualBox, I've traced
the issue to sendfile(2). I changed server.network-backend to "write"
and "writev" and the issue went away. Changing it to freebsd-sendfile
caused the issue.

>
> Disabling lightttpd's use of kqueue using the following prevented this.
> server.event-handler = "poll"
>

Hmm... maybe there's some weird interaction with sendfile/kqueue going
on here. *shrug*

- -- Jacob

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