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------- Additional Comments From [EMAIL PROTECTED]  2008-02-01 11:42 -------
Created an attachment (id=21458)
 --> (http://issues.apache.org/bugzilla/attachment.cgi?id=21458&action=view)
tcpdump capture of bad ajp13 POST retries

Attached is tcpdump capture with snaplen 1500 demonstrating bad mod_proxy_ajp
POST retries.  

This is a deliberately pathological example where the client didn't send POST
message body until 3 seconds after it sent POST headers.  As you can see,
tomcat ajp13 connector hangs up on the first request after 500ms (FIN, packet
6).  At 3.5s the client completes the POST request, apache sends the message
body to tomcat (packet 8), and tomcat replies with RST (packet 10).

At that point apache has the complete POST and it retries the request.  It
reconnects and sends the message header (packet 15) and nothing else.  500ms
later tomcat ajp13 connector hangs up on it.  

Repeat until maxattempts exhausted.

A useful way to see this in wireshark is 
View -> Time Display Format -> Seconds Since previous Capture Packet

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