[squid-users] gateway failure

[Vieri]

Hi,

I'm sometimes getting hit by ERR_GATEWAY_FAILURE. I'd like to know what could be causing this issue.
When this happens on a production server, I don't have much time to investigate.
I usually only have enough time to ssh into the squid server, test internet access via command line, and before I know it, the issue's gone.

Nothing much in cache.log. I have debug_options rotate=1 ALL,1. I'd rather not set ALL,9 on a production system for something that happens maybe only once every 2 or 3 days.
I'm not sure however which sections and levels to  set so I can get an idea as to why I'm getting ERR_GATEWAY_FAILURE.

https://wiki.squid-cache.org/KnowledgeBase/DebugSections

Any suggestions?

Thanks,

Vieri