如何杀死defunct进程(译)

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:

  • 重启你的计算机
  • 继续往下读...

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>
  • UID:用户ID
  • PID:进程ID
  • PPID:父进程ID

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。

参考文献


译注

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>

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