We continue to see occasional 502 errors on DIRECT connections to sites. These 
never happen when running through Squid so there is some difference between ATS 
and Squid. Examples:

1304426660.849 1322 172.16.88.240 TCP_MISS/200 11469 CONNECT 
interface.gta-travel.com:443/ - DIRECT/interface.gta-travel.com - -
1304426661.614 762 172.16.88.240 TCP_MISS/200 6869 CONNECT 
interface.gta-travel.com:443/ - DIRECT/interface.gta-travel.com - -
1304426662.759 79 172.16.88.240 ERR_CONNECT_FAIL/502 460 CONNECT 
interface.gta-travel.com:443/ - DIRECT/interface.gta-travel.com text/html -
1304426665.474 5949 172.16.88.240 TCP_MISS/200 77316 CONNECT 
interface.gta-travel.com:443/ - DIRECT/interface.gta-travel.com - -

The connection failure (502) only occurs when using traffic server and it does 
not occur every time. This was happening as far back as 2.1.5 and is still 
happening with the 2.1.8 release candidate. It's unfortunately preventing us 
from moving to ATS.

Is there some timeout parameter that needs to be modified to match whatever 
Squid is using by default? We tried changing 
proxy.config.http.connect_attempts_timeout to 30 instead of the default 20 but 
that didn't fix the issue.

-Dave


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