When a request URI is too large, APIcast logs warn messages like this
021/11/18 03:21:10 [warn] 23#23: *35292 using uninitialized "access_logs_enabled" variable while logging request, client: 10.128.0.1, server: _, request: "GET /?user_key=<user_key>&foo=aaaa ( followed by a long string of characters )
and
2021/11/18 03:21:10 [warn] 23#23: *35292 using uninitialized "extended_access_logs_enabled" variable while logging request, client: 10.128.0.1, server: _, request: "GET /?user_key=<user_key>&foo=aaaa ( followed by a long string of characters )
Note: in this case, the client receives 414 Request-URI Too Large error, but it's hard to identify the error from the APIcast logs.
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