96         PLOG(ERROR) << "Failed to find cgroup for tid " << tid;  in CgroupGetAttributePathForTask()
164                     PLOG(WARNING) << "Failed to remove " << path;  in RemoveUidProcessGroups()
189             PLOG(ERROR) << "Failed to open " << cgroup_root_path;  in removeAllProcessGroups()
208                     PLOG(WARNING) << "Failed to remove " << path;  in removeAllProcessGroups()
241         PLOG(WARNING) << "Failed to open process cgroup uid " << uid << " pid " << initialPid;  in DoKillProcessGroupOnce()
262         if (pgid == -1) PLOG(ERROR) << "getpgid(" << pid << ") failed";  in DoKillProcessGroupOnce()
286             PLOG(WARNING) << "kill(" << -pgid << ", " << signal << ") failed";  in DoKillProcessGroupOnce()
296             PLOG(WARNING) << "kill(" << pid << ", " << signal << ") failed";  in DoKillProcessGroupOnce()
339         PLOG(ERROR) << "Error encountered killing process cgroup uid " << uid << " pid "  in KillProcessGroup()
389         PLOG(ERROR) << "Failed to make and chown " << uid_path;  in createProcessGroup()
396         PLOG(ERROR) << "Failed to make and chown " << uid_pid_path;  in createProcessGroup()
405         PLOG(ERROR) << "Failed to write '" << initialPid << "' to " << uid_pid_procs_file;  in createProcessGroup()
413         PLOG(ERROR) << "Memcg is not mounted.";  in SetProcessGroupValue()
419         PLOG(ERROR) << "Failed to find attribute '" << attr_name << "'";  in SetProcessGroupValue()
424         PLOG(ERROR) << "Failed to write '" << value << "' to " << path;  in SetProcessGroupValue()