ps server和ps scheduler启动之后，接收ctrl + c信号出core

./ps -r scheduler -sp zfs://localhost:2181/scheduler -cp . -bc false -p 8801 -sn 1 -snet 10000 -smem 10000 -sqps 100000

Start by reproducing the crash with the provided `./ps -r scheduler ...` command, then send Ctrl+C after both the ps server and scheduler are running. Inspect the resulting core dump and signal-handling entry points; done means Ctrl+C shuts both processes down without producing a core dump.

Written by the indexing model from the issue text.