Re: [squid-users] When does Squid reset upstream connections?

From: Amos Jeffries <>
Date: Thu, 25 Aug 2011 13:32:01 +1200

 On Thu, 25 Aug 2011 01:58:53 +0800, Kaiwang Chen wrote:
> Hello,
> After a few pairs of HTTP Get and Response, actually for different
> clients to retrieve data, over the same persistent upstream
> connection, Squid(3.1.11) may send one RST+ACK, following by a few
> RST's with the same sequence number as RST+ACK. In some other cases,
> Squid gracefully closes the upstream connection by initiating a
> FIN+ACK packet. I guess Squid has some management procedure to
> distinguish these cases... then what are the approaches?

 RST or FIN as per the TCP specifications. Basically RST in errors.

 When a client disconnects and the server connection cannot be re-used.
 When client disconnects and object is not cacheable. When excess data is
 pushed into the link by the server. When the server replies with invalid

Received on Thu Aug 25 2011 - 01:32:05 MDT

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