On Fri, 1 Nov 2013, Shao, Shuchao wrote:

> if I use the latest curl-7.33.0 to take place of the curl-7.24.0, there will
> be many CLOSE_WAIT on my curl-loader machine. Seems it is a bug introduced
> between 7.24.0 and 7.33.0.

...

> Do you have some idea what will result in this or give some instruction on
> how to debug this?

Hm. That sounds bad. Unfortunately there's some 2100+ commits done between
those two versions so it's not easy to tell what's causing this just based on
this information.

I would suggest that you bisect your way to the offending commit and if you
tell us about it, we can analyze it and see what can/should be done.

-- 
  / daniel.haxx.se
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