[plt-scheme] dynamic-wind & kill-thread

From: Ryan Culpepper (ryanc at ccs.neu.edu)
Date: Tue Apr 21 18:50:29 EDT 2009

spgsql connections are definitely not kill-safe. Does the web server,  
in fact, kill servlet threads under some circumstances (like reload)?

I don't have time right now to write a kill-safe proxy, but I would be  
happy to accept one and add it to the package.


On Apr 21, 2009, at 3:44 PM, YC wrote:

> Oops - did not cc plt-scheme.
> ---------- Forwarded message ----------
> From: YC <yinso.chen at gmail.com>
> Date: Tue, Apr 21, 2009 at 12:42 PM
> Subject: Re: [plt-scheme] dynamic-wind & kill-thread
> To: Robby Findler <robby at eecs.northwestern.edu>
> On Tue, Apr 21, 2009 at 12:09 PM, Robby Findler <robby at eecs.northwestern.edu 
> > wrote:
> Well, it is the case that if you're using non-kill-safe- code (as it
> sounds like spqsql is), then you cannot kill those threads.
> The threads are initiated and managed from web-server.  I don't know  
> how it handles interrupted connections (I generally reproduce the  
> bug via refreshing browser quickly), but these threads appears  
> outside my apps control.
> You might be able to build a kill-safe wrapper for that code, however.
> That is, put all of the code that queries the database into a single
> thread and then communicate with that thread in a kill-safe manner
> (much like the way the manager thread manages the queue in our kill
> safe paper).
> Yeah that's my current plan as a stop gap.  Eventually I think the  
> kill-safe code should belong in spgsql package itself.
> Is Trac still the right place to file bugs?  I have bugs filed 5  
> months ago not being touched.
> Thanks,
> yc
> _________________________________________________
>  For list-related administrative tasks:
>  http://list.cs.brown.edu/mailman/listinfo/plt-scheme

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.racket-lang.org/users/archive/attachments/20090421/91a1afae/attachment.html>

Posted on the users mailing list.