Lots of these, within the same second:
[pid: 27780] 10.64.32.97 (-) {46 vars in 916 bytes} [Tue Nov 28 17:55:00 2017] GET /scores/nlwiki/damaging/?model_info=test_stats&format=json => generated 106 bytes in 1 msecs (HTTP/1.1 400) 6 headers in 217 bytes (1 switches on core 0) user agent "MediaWiki/1.31.0-wmf.8"