[web-devel] Hoogle Advice

Jeremy Shaw jeremy at n-heptane.com
Tue Jan 25 22:45:29 CET 2011

Ah yes, that issue. I remember it well.

Unfortunately, I was never able to recreate the issue, so it is
difficult to create an optimal low-level solution.

However, in the latest Happstack, we will kill the thread if there is
no progress made for 30 seconds. So, I do not believe it will leak
threads for an arbitrary amount of time anymore.

- jeremy

On Tue, Jan 25, 2011 at 3:22 PM, Bardur Arantsson <spam at scientician.net> wrote:
> On 2011-01-25 21:53, Jeremy Shaw wrote:
>> On Jan 25, 2011, at 1:18 PM, Bardur Arantsson wrote:
>>> On 2011-01-25 18:35, Jeremy Shaw wrote:
> [--snip--]
>> SendFile should not leak file handles. I have run millions of sendfile
>> requests through happstack (in darcs) with no signs of FD/thread leakage.
> You're using a well-behaved TCP/HTTP client. The PS/3 isn't that
> well-behaved -- it cuts connections IMMEDIATELY (no TCP shutdown or anything
> of that nature) once it's decided that it doesn't need the connection any
> more. Under those circumstances I believe that the sendfile library still
> leaks threads for an essentially arbitrary amount of time.
> If you recall, there was a huge thread on -cafe on this back in Feb. of
> 2010. This was 100% reproducible with a PS3 client, and I haven't seen any
> evidence that the thread leak has been addressed.
> Anyway, didn't want to hijack this thread. I'll go back to lurking now :).
> Cheers,
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