从下述案例中可以看到使用kill -9 28051并未将28051进程杀死
[root@iZufxxxxxxxxxxxx2tnZ devops-xxl-job]# kill -9 28051 [root@iZufxxxxxxxxxxxx2tnZ devops-xxl-job]# jps 28051 Launcher 29247 Jps [root@iZufxxxxxxxxxxxx2tnZ devops-xxl-job]# jps 28051 Launcher 29539 Jps [root@iZufxxxxxxxxxxxx2tnZ devops-xxl-job]# cd /proc/28051 [root@iZufxxxxxxxxxxxx2tnZ 28051]# jps 28051 Launcher 29582 Jps [root@iZufxxxxxxxxxxxx2tnZ 28051]# cat status Name: java State: Z (zombie) Tgid: 28051 Ngid: 0 Pid: 28051 PPid: 28000 TracerPid: 0 Uid: 0 0 0 0 Gid: 0 0 0 0 FDSize: 0 Groups: 0 Threads: 1 SigQ: 3/31202 SigPnd: 0000000000000000 ShdPnd: 0000000000004100 SigBlk: 0000000000000000 SigIgn: 0000000000000000 SigCgt: 2000000181005ccf CapInh: 0000000000000000 CapPrm: 0000001fffffffff CapEff: 0000001fffffffff CapBnd: 0000001fffffffff CapAmb: 0000000000000000 Seccomp: 0 Speculation_Store_Bypass: vulnerable Cpus_allowed: f Cpus_allowed_list: 0-3 Mems_allowed: 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000001 Mems_allowed_list: 0 voluntary_ctxt_switches: 19 nonvoluntary_ctxt_switches: 2 [root@iZufxxxxxxxxxxxx2tnZ 28051]# kill -9 28000杀不掉的原因有两种：
1.这个进程是僵尸进程 2.此进程是"核心态"进程
解决方案：
1、进入到“/proc/进程号”目录下，执行“cat status”命令可以查询到指定进程的父进程
2、利用“kill -9 父进程的进程号”将父进程给删除掉；
3、利用“kill 进程号”重新删除指定进程即可
