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I have a defunct process on my system:
abc 22093 19508 0 23:29 pts/4 00:00:00 grep ProcA abc 31756 1 0 Dec08 ? 00:00:00 [ProcA_my_collect] <defunct> How can I kill the above process, without a reboot of the machine? I have tried with
kill -9 31756 sudo kill -9 31756
You have killed the process, but a dead process doesn’t disappear from the process table until its parent process performs a task called ‘reaping’ (essentially calling
wait(3)for that process to read its exit status). Dead processes that haven’t been reaped are called ‘zombie processes.’The parent process id you see for 31756 is process id 1, which always belongs to
init. That process should reap its zombie processes periodically, but if it can’t, they will remain zombies in the process table until you reboot.