Zhang, Xu, Xu, Yong, Chintalapati, Murali, Rajmohan, Saravanakumar, Zhang, Dongmei, Qin, Si, He, Shilin, Qiao, Bo, Li, Ze, Zhang, Hongyu, Li, Xukun, Dang, Yingnong, Lin, Qingwei. Association for Computing Machinery (ACM); 2021. Onion: Identifying incident-indicating logs for cloud systems.