I'm seeing a series of recursive /undefined URLs from Opera in my weblog. It seems they build up indefinitely until the URL becomes too long for php-fpm to grok. It's with numerous versions of Opera as you can see here (is UCBrowser a repackaged Opera?)
Opera/9.80 (MAUI Runtime; Opera Mini/6.1.27412/37.7936; U; en) Presto/2.12.423 Version/12.16 UCWEB/2.0 (Java; U; MIDP-2.0; Nokia203/20.37) U2/1.0.0 UCBrowser/8.7.0.218 U2/1.0.0 Mobile Opera/9.80 (Android; Opera Mini/14.0.2065/37.7936; U; id) Presto/2.12.423 Version/12.16 Opera/9.80 (J2ME/MIDP; Opera Mini/4.2.17605/37.7936; U; ru) Presto/2.12.423 Version/12.16 SAMSUNG-GT-C3312R Opera/9.80 (J2ME/MIDP; Opera Mini/7.1.33680/37.7936; U; en) Presto/2.12.423 Version/12.16
Presto version looks consistent. Perhaps a known bug? Access log snippets below (IP addresses removed to protect the innocent). Any thoughts what might be going on here?
thx mp
www.popsugar.com - - [15/Mar/2016:03:36:03 -0700] 0.001 "GET /static/ck.php?nids[]=32513607&r=601341 HTTP/1.1" 204 0 "http://www.popsugar.com/smart-living/undefined/smart-living/undefined/smart-living/undefined/smart-living/undefined/smart-living/undefined/smart-living/undefined/smart-living/undefined/smart-living/undefined/smart-living/undefined/smart-living/undefined/smart-living/undefined/smart-living/undefined/smart-living/undefined/smart-living/undefined/smart-living/undefined/smart-living/Best-DIY-Gifts-32414022?slide=2" "Opera/9.80 (Android; Opera Mini/7.6.40234/37.7936; U; en) Presto/2.12.423 Version/12.16"
www.popsugar.com - - [15/Mar/2016:03:38:05 -0700] 0.001 "GET /static/ck.php?nids[]=7501917&r=771800 HTTP/1.1" 204 0 "http://www.popsugar.com/fitness/undefined/fitness/undefined/fitness/undefined/fitness/Push-Ups-Variations-Benefits-7501338?slide=0" "Opera/9.80 (Android; Opera Mini/12.0.1987/37.7936; U; en) Presto/2.12.423 Version/12.16"
www.popsugar.com - - [15/Mar/2016:03:24:02 -0700] 0.001 "GET /static/ck.php?nids[]=24324354&r=321460 HTTP/1.1" 204 0 "http://www.popsugar.com/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/undefined/celebrity/Sexiest-Charlize-Theron-Pictures-24324143?slide=3" "Opera/9.80 (J2ME/MIDP; Opera Mini/4.5.40380/37.7936; U; en) Presto/2.12.423 Version/12.16"
Opera/9.80 (X11; Linux zvav; U; en) Presto/2.12.423 Version/12.16 Opera/9.80 (Android; Opera Mini/15.0.2125/37.7936; U; en) Presto/2.12.423 Version/12.16 Opera/9.80 (Android; Opera Mini/7.5.34817/37.7936; U; en) Presto/2.12.423 Version/12.16 Opera/9.80 (Android; Opera Mini/15.0.2125/37.7936; U; en) Presto/2.12.423 Version/12.16 Opera/9.80 (Android; Opera Mini/7.5.33361/37.7936; U; en) Presto/2.12.423 Version/12.16 Opera/9.80 (Android; Opera Mini/7.5.34817/37.7936; U; en) Presto/2.12.423 Version/12.16 Opera/9.80 (Android; Opera Mini/7.5.35721/37.7936; U; en) Presto/2.12.423 Version/12.16 Opera/9.80 (J2ME/MIDP; Opera Mini/4.2.17605/37.7936; U; ru) Presto/2.12.423 Version/12.16 Opera/9.80 (Android; Opera Mini/7.5.35721/37.7936; U; en) Presto/2.12.423 Version/12.16 Opera/9.80 (J2ME/MIDP; Opera Mini/8.0.35676/37.7936; U; en) Presto/2.12.423 Version/12.16 UCWEB/2.0 (Java; U; MIDP-2.0; Nokia203/20.37) U2/1.0.0 UCBrowser/8.7.0.218 U2/1.0.0 Mobile