When retrying a failed persistent connection, httpclient should use a fresh connection about httpclient

[nahi]

If I understand the issue, this commit unexpectedly fixed it: 3ec4757
I close this issue but please feel free to reopen this if the commit does not fix your problem.

[nahi]

I'll check this: xb@d601390

[nahi]

The above link is wrong. This is the patch: xb@b9ce0a5

[nahi]

Well perhaps I've just understood now. Closing after raising an exception should not be enough since in this scenario, there are many other cached connections to the same origin server and all of those are considered useless.

Hmm.

[nahi]

Invalidate pooled sessions for the same destination when we got a KeepAliveDisconnected exception. closed by a620b5f.

I know the original intent of #30 is 'create a new (non cached) session
when we got a KeepAliveDisconnected' but the suggested fix could create
too much session to the same site I guess... So at this time, I decided
to invalidate all sessions to the same site. It must include live
sessions (not expired) but it should not cause performance degrade in
the situation such as we got KeepAliveDisconnected.