[squid-users] ICAP Error while downloading some java script files like https://aproxy.ksgct.de/js/srp.js

[Alex Rousskov]

On 2026-03-17 10:04, Alex Rousskov wrote:
> On 2026-03-17 03:04, Dieter Bloms wrote:
>
>> I run squid 7.5 on debian trixie as follow: ...
>> It's working very well, but sometimes (very rarely) the ICAP error 
>> page ERR_ICAP_FAILURE is displayed.
>> I've created network dumps and also run Squid in debug mode.
>> It looks to me as though Squid isn’t sending all the data to the ICAP 
>> scanner,
>> causing it to terminate the connection after the configured 5-minute 
>> timeout.
>> I’ve tried two ICAP virus scanners (c-icap and Avira ICAP Proxy 
>> https://oem.avira.com/en/solutions/anti-malware#ICAP),
>> and both exhibited the same behavior.
>>
>> Is this a known issue, or should I file a bug report?
> 
> FWIW, my quick search did not find any recently changed ICAP bugs with 
> similar symptoms. I can volunteer to look through your debugging 
> cache.log if you can share a pointer to a compressed file with me, 
> privately if needed. I prefer ALL,9 logs from the affected worker, but 
> will look at what you have.

Thank you for sharing those debugging logs! The logs confirmed that this 
is a known bug that was fixed in master/v8 a year ago. It is now fixed 
in Squid v7 as well (commit 8a1c5cf). That v7 fix should become a part 
of the future v7.6 release.

Alex.