原文: How to kill defunct process
译者: youngsterxyf
defunct进程是指出错损坏的进程,父子进程之间不会再通信。有时,它们会演变成“僵尸进程”,存留在你的系统中,直到系统重启。可以尝试 “kill -9” 命令来清除,但多数时候不管用。
为了杀死这些defunct进程,你有两个选择:
我们先看看系统中是否存在defunct进程:
$ ps -A | grep defunct
假设得到的输出如下所示:
8328 ? 00:00:00 mono <defunct> 8522 ? 00:00:01 mono <defunct> 13132 ? 00:00:00 mono <defunct> 25822 ? 00:00:00 ruby <defunct> 28383 ? 00:00:00 ruby <defunct> 18803 ? 00:00:00 ruby <defunct>
这意味着存在6个defunct进程:3个mono进程,以及3个ruby进程。这些进程之所以存在,可能是因为应用程序写得很烂或者用户做了不常见的操作,在我这,一定是我写的mono C#程序存在严重问题 :smile: 。
现在,我们来看看这些进程的ID及其父进程ID:
$ ps -ef | grep defunct | more
以上命令的输出如下:
UID PID PPID ... --------------------------------------------------------------- kenno 8328 6757 0 Mar22 ? 00:00:00 [mono] <defunct> kenno 8522 6757 0 Mar22 ? 00:00:01 [mono] <defunct> kenno 13132 6757 0 Mar23 ? 00:00:00 [mono] <defunct> kenno 25822 25808 0 Mar27 ? 00:00:00 [ruby] <defunct> kenno 28383 28366 0 Mar27 ? 00:00:00 [ruby] <defunct> kenno 18803 18320 0 Apr02 ? 00:00:00 [ruby] <defunct>
如果你使用命令 “kill -9 8328” 尝试杀死ID为8328的进程,可能会没效果。要想成功杀死该进程,需要对其父进程(ID为6757)执行kill命令( $ kill -9 6757
)。对所有这些进程的父进程ID应用kill命令,并验证结果( $ ps -A | grep defunct )。
如果前一个命令显示无结果,那么搞定!否则,可能你需要重启一下系统。
执行命令 ps aux | grep defunct
,如果进程为defunct,则其第8列为 Z
。如下所示:
work 13391 0.1 0.0 0 0 pts/0 Z 10:50 0:23 [python] <defunct> work 13393 0.0 0.0 0 0 pts/0 Z 10:50 0:15 [python] <defunct> work 13394 0.0 0.0 0 0 pts/0 Z 10:50 0:15 [python] <defunct> work 13395 0.1 0.0 0 0 pts/0 Z 10:50 0:28 [python] <defunct> work 13396 0.0 0.0 0 0 pts/0 Z 10:50 0:15 [python] <defunct> work 13397 0.1 0.0 0 0 pts/0 Z 10:50 0:23 [python] <defunct> work 13398 0.0 0.0 0 0 pts/0 Z 10:50 0:15 [python] <defunct> work 13399 0.1 0.0 0 0 pts/0 Z 10:50 0:22 [python] <defunct> work 13400 0.0 0.0 0 0 pts/0 Z 10:50 0:15 [python] <defunct> work 13401 0.1 0.0 0 0 pts/0 Z 10:50 0:22 [python] <defunct> work 13402 0.0 0.0 0 0 pts/0 Z 10:50 0:16 [python] <defunct> work 13403 0.0 0.0 0 0 pts/0 Z 10:50 0:14 [python] <defunct> work 13404 0.0 0.0 0 0 pts/0 Z 10:50 0:15 [python] <defunct> work 13405 0.0 0.0 0 0 pts/0 Z 10:50 0:15 [python] <defunct> work 13406 0.0 0.0 0 0 pts/0 Z 10:50 0:16 [python] <defunct> work 13407 0.0 0.0 0 0 pts/0 Z 10:50 0:02 [python] <defunct> work 13408 0.0 0.0 0 0 pts/0 Z 10:50 0:14 [python] <defunct>