[sldev] SNOW-2: getting to the bottom of the curl crashers

[Paul Oppenheim (Poppy Linden)]

any link(s) to the relevant source?

+ poppy

Rob Lanphier wrote:
> Hi folks,
> 
> We're trying to decide just how important SNOW-2 is:
> http://jira.secondlife.com/browse/SNOW-2
> 
> This is our tracking issue for the vague crash reports we have involving
> curl.  We're not getting good stack traces or anything like that, and
> people have generally not been complaining about this particular problem.
> 
> However, based on some evidence that Merov noticed and is digging into
> now, it would seem that the curl crashers seem to happen in the map code
> (because secondlife.log indicates to be accessing S3 at the time of the
> crash).  Furthermore, the problem generally might be linked to improper
> use of curl in the viewer (e.g. overusing the same curl handle).  This
> might be a case where gentle use of the map works like a charm, but
> using the map while chatting and teleporting and using the inworld web
> browser may be another story altogether.
> 
> So, we'd like you to help by hammering on this issue, and reporting your
> results (either positive or negative) in SNOW-2.  In particular, some
> things to try:
> 1.  Lots of things that would use HTTP simultaneously (e.g moving around
> in the map, then quickly teleporting before the map loads in all of the way)
> 2.  Really use the map.  Zoom out, zoom in, try to find regions with
> missing textures
> 3.  grep the code yourself for libcurl usage, and figure out other ways
> of torturing that code.
> 
> Let's figure out if we need to figure this problem out before declaring
> this "Snowglobe 1.0".
> 
> Thanks!
> Rob
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