[root@node5 log]# top -p 6485 top -p 6485 top - 09:19:41 up 12 days, 22:27, 1 user, load average: 3.05, 5.07, 6.64 Tasks: 1 total, 0 running, 1 sleeping, 0 stopped, 0 zombie Cpu(s): 4.8%us, 1.4%sy, 0.0%ni, 93.1%id, 0.6%wa, 0.0%hi, 0.1%si, 0.0%st Mem: 264420148k total, 182040780k used, 82379368k free, 834232k buffers Swap: 8388600k total, 92k used, 8388508k free, 100453708k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 6485 root 20 0 984m 12m 4440 R 100.2 0.0 844:22.68 libvirtd #cpu占用100%，无法释放，影响系统稳定性
杀进程
[root@node5 log]# kill -9 6485 [root@node5 log]# kill -9 6485 [root@master log]# ps ax |grep libvirtd #检查进程依然存在 6485 ? R 863:37 libvirtd --daemon -l [root@node5 ~]# libvirtd -d -l --config /etc/libvirt/libvirtd.conf libvirtd：错误：Unable to initialize network sockets。查看 /var/log/messages 或者运行不带 --daemon 的命令查看更多信息。 [root@node5 ~]# netstat -antp |grep 16509 tcp 0 0 0.0.0.0:16509 0.0.0.0:* LISTEN 3658/libvirtd tcp 1 0 192.168.14.25:16509 192.168.14.22:8717 CLOSE_WAIT - tcp 1 0 192.168.14.25:16509 192.168.14.20:5152 CLOSE_WAIT - tcp 1 0 192.168.14.25:16509 192.168.14.10:39359 CLOSE_WAIT - tcp 0 0 :::16509 :::* LISTEN 3658/libvirtd tcp 39 0 ::1:16509 ::1:19715 CLOSE_WAIT -
经过上述操作，初步判断libvirtd陷入了hang死状态。
追踪进程
[root@node5 log]#strace -f libvirtd [pid 107570] close(23058) = -1 EBADF (Bad file descriptor) [pid 107570] close(23059) = -1 EBADF (Bad file descriptor) [pid 107570] close(23060) = -1 EBADF (Bad file descriptor) [pid 107570] close(23061) = -1 EBADF (Bad file descriptor) [pid 107570] close(23062) = -1 EBADF (Bad file descriptor) [pid 107570] close(23063) = -1 EBADF (Bad file descriptor) [pid 107570] close(23064) = -1 EBADF (Bad file descriptor) [pid 107570] close(23065) = -1 EBADF (Bad file descriptor) [pid 107570] close(23066) = -1 EBADF (Bad file descriptor) [pid 107570] close(23067) = -1 EBADF (Bad file descriptor) [pid 107570] close(23068) = -1 EBADF (Bad file descriptor) [pid 107570] close(23069) = -1 EBADF (Bad file descriptor) [pid 107570] close(23070) = -1 EBADF (Bad file descriptor) [pid 107570] close(23071) = -1 EBADF (Bad file descriptor) ^C[pid 107570] close(23072 <unfinished ...> Process 107559 detached Process 107560 detached Process 107561 detached Process 107562 detached Process 107563 detached Process 107564 detached Process 107565 detached Process 107566 detached Process 107567 detached Process 107568 detached Process 107569 detached Process 107570 detached
父进程6485在不断的产生和关闭子进程，并返回错误信息。Bad file descriptor的原因（如何触发的，谁触发的）？ 循环为何无法退出？问题如何再现？
