[squid-users] TCP_MISS_ABORTED/502

[Ben Toms]

Logs below:

----------
2024/07/12 14:57:08.678 kid1| 11,2| http.cc(1263) readReply: conn17 local=squid.cache.ip:42848 remote=public.ip.of.public.server:443 FIRSTUP_PARENT FD 14 flags=1: read failure: (0) No error.
2024/07/12 14:57:08.678 kid1| 11,2| Stream.cc(273) sendStartOfMessage: HTTP Client conn14 local=squid.cache.ip:443 remote=client.ip:56517 FD 13 flags=1
2024/07/12 14:57:08.678 kid1| 11,2| Stream.cc(274) sendStartOfMessage: HTTP Client REPLY:
---------
HTTP/1.1 502 Bad Gateway
Server: squid/6.6
Mime-Version: 1.0
Date: Fri, 12 Jul 2024 14:57:08 GMT
Content-Type: text/html;charset=utf-8
Content-Length: 3629
X-Squid-Error: ERR_READ_ERROR 0
Vary: Accept-Language
Content-Language: en
Cache-Status: squid.host;detail=mismatch
Via: 1.1 squid.host (squid/6.6)
Connection: keep-alive


----------


Regards,
Ben.

From: squid-users <squid-users-bounces at lists.squid-cache.org> on behalf of Amos Jeffries <squid3 at treenet.co.nz>
Date: Friday, 12 July 2024 at 15:22
To: squid-users at lists.squid-cache.org <squid-users at lists.squid-cache.org>
Subject: Re: [squid-users] TCP_MISS_ABORTED/502

On 13/07/24 01:52, Alex Rousskov wrote:
> On 2024-07-12 08:06, Ben Toms wrote:
>> Seems that my issue is similar to -
>> https://serverfault.com/questions/1104330/squid-cache-items-behind-basic-authentication
>
> You are facing up to two problems:
>
> 1. Some authenticated responses are not cachable by Squid. Please share
> HTTP headers of the response in question.
>

FYI, those can be obtained by configuring squid.conf with

   debug_options 11,2


Cheers
Amos


> 2. TCP_MISS_ABORTED/502 errors may delete a being-cached response. These
> can be bogus errors (essentially Squid logging bugs) or real ones (e.g.,
> due to communication bugs, misconfiguration, or compatibility problems).
> I recommend adding %err_code/%err_detail to your logformat and sharing
> the corresponding access.log lines (obfuscated as needed).
>
> Sharing (privately if needed) a pointer to compressed ALL,9 cache.log
> while reproducing the issue using a single transaction may help us
> resolve all the unknowns:
>
> https://wiki.squid-cache.org/SquidFaq/BugReporting#debugging-a-single-transaction
>
>
> HTH,
>
> Alex.
>
>


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