RE: TCP Connection failures

Do you have single_parent_bypass on by any chance in the child cache? If
so, turn it off. This means the child should recover better if the
parent goes down.

Jonathan L.
Origin, 323 Cambridge Science Park,Cambridge,UK. Tel:+44 (1223) 423355
 ---[ It is impossible to enjoy idling thoroughly unless one has ]---
 ------------[ plenty of work to do - Jerome K. Jerome ]-------------
Fight spam! http://spam.abuse.net/ These opinions are all my fault

>----------
>From: Ralf Rudolph
>Sent: 28 October 1997 13:22
>To: squid-users@nlanr.net
>Subject: TCP Connection failures
>
>Hi, squid´ers,
>we have installed two squid proxies, one parent proxy on a machine with
>internet connectivity, the other one inside an internal network. The client
>squid looses connection ("TCP connection to xxx failed") to its parent squid
>very often (see log below for an example: 4 connection losses per hour). It
>seems to get worse if the squid load is heavy.
>
>I have patched the source (neighbors.c) so that the retry interval is reduced
>to 5 seconds (default is 90 seconds): Thanks to this patch (thanks to
>Gert-Jan Looy for this hint), the users only have a blackout time of 5
>seconds. Most browsers will auto-retry and the users only notice a small
>delay. Still, large downloads have a nearly 100 Percent chance to get aborted
>due to the TCP connection failure.
>
>Other services run very well between these two machines, so it is definitly
>no hardware or network or firewall problem. I also heard of other squid users
>having these problems, so it seems not to be related to our installation
>only.
>
>Is anybody working on this problem? Can I supply some help in terms of
>logfiles or debug features or something (I can reproduce this problem very
>easy: It´s happening every few hours).
>
>Both machines are running linux 2.0.29 and squid 1.1.8, but I heared of other
>(newer) squid versions having exactly the same problem (e.g., squid 1.1.16
>on a svr4).
>
>Thanks for any hint!
>
>PS: This is an example log of the client squid:
>
>Oct 27 17:27:24 xxclient squid[2956]: TCP connection to
>xxparent.domain.de/3128 failed
>Oct 27 17:27:30 xxclient squid[2956]: TCP connection to
>xxparent.domain.de/3128 succeeded
>Oct 27 17:34:02 xxclient squid[2956]: TCP connection to
>xxparent.domain.de/3128 failed
>Oct 27 17:34:07 xxclient squid[2956]: TCP connection to
>xxparent.domain.de/3128 succeeded
>Oct 27 17:48:51 xxclient squid[2956]: TCP connection to
>xxparent.domain.de/3128 failed
>Oct 27 17:48:56 xxclient squid[2956]: TCP connection to
>xxparent.domain.de/3128 succeeded
>Oct 27 17:54:34 xxclient squid[2956]: TCP connection to
>xxparent.domain.de/3128 failed
>Oct 27 17:54:41 xxclient squid[2956]: TCP connection to
>xxparent.domain.de/3128 succeeded
>
>
>|
>| Ralf Rudolph
>| Dipl.-Inf. (FH)
>|
>| Artifex Editorial Services GmbH
>| Johanna-Melber-Weg 4
>| D-60599 Frankfurt / Germany
>|
>| Phone: +49-69-962217-24
>| Fax: +49-69-610351
>| E-Mail: rrudolph@artifex.de
>|
>
Received on Wed Oct 29 1997 - 07:46:33 MST