Date: Tue, 29 Aug 2006 20:13:11 +0200 From: Radim Kolar <hsn@netmag.cz> To: FreeBSD-gnats-submit@FreeBSD.org Cc: hsn@sd.iol.cz Subject: kern/102653: TCP stack sends infinite retries for connection in LAST_ACK state Message-ID: <E1GI85H-000FJg-5q@sanatana.dharma> Resent-Message-ID: <200608291820.k7TIKKgk095061@freefall.freebsd.org>
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>Number: 102653 >Category: kern >Synopsis: TCP stack sends infinite retries for connection in LAST_ACK state >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue Aug 29 18:20:19 GMT 2006 >Closed-Date: >Last-Modified: >Originator: Radim Kolar >Release: FreeBSD 6.1-STABLE i386 >Organization: >Environment: System: FreeBSD sanatana.dharma 6.1-STABLE FreeBSD 6.1-STABLE #3: Fri Aug 25 12:13:08 CEST 2006 root@sanatana.dharma:/usr/obj/usr/src/sys/UP i386 >Description: I discovered that my machine sends infinite retries for these 2 connections: tcp4 0 0 sanatana.61564 mail.xsec.it.http LAST_ACK tcp4 0 0 sanatana.59795 www.xiti.dk.http LAST_ACK it sends packets every 2 seconds or so and gets no reply from remote computer: 20:07:14.855393 IP sanatana.dharma.61564 > mail.xsec.it.http: . ack 1 win 0 20:07:14.855593 IP sanatana.dharma.61564 > mail.xsec.it.http: F 1:1(0) ack 1 win 32832 <nop,nop,timestamp 42851121 1376192245> 20:07:14.855662 IP sanatana.dharma.59795 > www.xiti.gr.http: . ack 1 win 0 20:07:14.855797 IP sanatana.dharma.59795 > www.xiti.gr.http: F 1:1(0) ack 1 win 32832 <nop,nop,timestamp 42851121 2800342> 20:07:16.726973 IP sanatana.dharma.61564 > mail.xsec.it.http: F 1:1(0) ack 1 win 32832 <nop,nop,timestamp 42852993 1376192245> 20:07:17.214834 IP sanatana.dharma.59795 > www.xiti.gr.http: F 1:1(0) ack 1 win 32832 <nop,nop,timestamp 42853481 2800342> 20:07:17.344771 IP sanatana.dharma.61564 > mail.xsec.it.http: F 1:1(0) ack 1 win 32832 <nop,nop,timestamp 42853611 1376192245> 20:07:17.954631 IP sanatana.dharma.59795 > www.xiti.gr.http: F 1:1(0) ack 1 win 32832 <nop,nop,timestamp 42854221 2800342> 20:07:18.380573 IP sanatana.dharma.61564 > mail.xsec.it.http: F 1:1(0) ack 1 win 32832 <nop,nop,timestamp 42854647 1376192245> 20:07:19.234371 IP sanatana.dharma.59795 > www.xiti.gr.http: F 1:1(0) ack 1 win 32832 <nop,nop,timestamp 42855501 2800342> I watched this activity for about 15 minutes, so my guess is that bsd box never gives up. >How-To-Repeat: >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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