What happens when a log whose path does not begin with / appears in the request log of the server?

I would like to ask under what circumstances C will occur.

// 

A: POST http://www.explame.com/a/b/c

:[2019-01-17T08:36:53.459Z] "POST /a/b/c/1.1" 200 - 288 89 27 24 "60.159.60.119" "Apache-HttpClient/4.5.2 (Java/1.8.0_171)" "28acr77c-5e90-4104-b260-329220f35b82" "www.explame.com" "176.45.2.111:8080" outbound|8082||aaa-svc.default.svc.cluster.local - 172.20.1.141:443 47.98.166.2:48014

B: http://www.explame.com/http://www.explame.com/a/b/c

:[2019-01-17T08:40:41.133Z] "POST /http://www.explame.com/a/b/cHTTP/1.1" 404 - 0 0 5 3 "60.159.60.119" "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36" "9eeaa699-b943-49d8-8e87-3f32a46lo454" "www.explame.com" "176.45.2.111:8080" outbound|8080||aaa-svc.default.svc.cluster.local - 172.20.1.141:80 66.139.61.99:61621

C:

:[2019-01-17T08:47:09.492Z] "POST http://www.explame.com/a/b/c?timestamp=2019-01-17+16%3A47%3A09&sign=FWER541F8A760BB29F6A66DEEEB3496D4&app_key=25536607&method=eeeee.city.listHTTP/1.1" 404 - 0 0 0 - "-" "-" "-" "www.explame.com:80" "-" - - 172.54.11.21:80 201.219.215.217:37946
May.06,2022

the first two types An and B belong to the absolute path, and the third kind C belongs to the full address.
currently, only the HTTP proxy server will receive the full address.

refer to HTTP standard
https://tools.ietf.org/html/r...

these logs indicate that the server was scanned.

MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b40668-2bd63.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b40668-2bd63.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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