Killing palo_be process takes long time

[tinkerrrr]

When I try to restart BE, it usually takes a long time to wait for palo_be process exit. So what does BE behave when receive KILL signal, is there any shutdown work which take long time?

[morningman]

It may be because currently Doris does not have a good logic for graceful exit.
So when kill -9, the BE process may become defunct for a relative long time.