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Re: When does Squid reset upstream connections?

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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 response.

Amos


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