I'm seeing the same problem too, with the latest 4.1.10, didn't have this problem before with heavier server load and older version of lsws, really weird.
when the problem occured litespeed is using 100 percent cpu. also seeing possibly memory leak, litespeed is using alot more memory than usual over time.
some strace below
epoll_ctl(7, EPOLL_CTL_DEL, 59, {0, {u32=59, u64=59}}) = 0
close(59) = 0
epoll_ctl(7, EPOLL_CTL_DEL, 78, {0, {u32=78, u64=78}}) = 0
close(78) = 0
epoll_ctl(7, EPOLL_CTL_DEL, 115, {0, {u32=115, u64=115}}) = 0
close(115) = 0
recvfrom(136, 0x7fff2ba1daef, 1, 2, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
epoll_ctl(7, EPOLL_CTL_DEL, 174, {0, {u32=174, u64=174}}) = 0
close(174) = 0
epoll_ctl(7, EPOLL_CTL_DEL, 175, {0, {u32=175, u64=175}}) = 0
close(175) = 0
epoll_ctl(7, EPOLL_CTL_DEL, 256, {0, {u32=256, u64=256}}) = 0
close(256) = 0
epoll_ctl(7, EPOLL_CTL_DEL, 265, {0, {u32=265, u64=265}}) = 0
close(265) = 0
epoll_ctl(7, EPOLL_CTL_DEL, 266, {0, {u32=266, u64=266}}) = 0
close(266) = 0
epoll_ctl(7, EPOLL_CTL_DEL, 268, {0, {u32=268, u64=268}}) = 0
close(268) = 0
epoll_ctl(7, EPOLL_CTL_DEL, 272, {0, {u32=272, u64=272}}) = 0
close(272) = 0
epoll_ctl(7, EPOLL_CTL_DEL, 278, {0, {u32=278, u64=278}}) = 0
close(278) = 0
epoll_ctl(7, EPOLL_CTL_DEL, 279, {0, {u32=279, u64=279}}) = 0
close(279) = 0
epoll_ctl(7, EPOLL_CTL_DEL, 288, {0, {u32=288, u64=288}}) = 0
close(288) = 0
epoll_ctl(7, EPOLL_CTL_DEL, 393, {0, {u32=393, u64=393}}) = 0
close(393) = 0
epoll_ctl(7, EPOLL_CTL_DEL, 425, {0, {u32=425, u64=425}}) = 0
close(425) = 0
