scheduler config balance-hot-region-scheduler list return 404

[lhy1024]

Please answer these questions before submitting your issue. Thanks!

1. What did you do?
   If possible, provide a recipe for reproducing the error.

» scheduler config balance-hot-region-scheduler help
Usage:
  pd-ctl scheduler config balance-hot-region-scheduler [flags]
  pd-ctl scheduler config balance-hot-region-scheduler [command]

Available Commands:
  list        list the config item
  set         set the config item

Global Flags:
  -h, --help   Help message.

Use "pd-ctl scheduler config balance-hot-region-scheduler [command] --help" for more information about a command.

2. What did you expect to see?

» scheduler config balance-hot-region-scheduler
{
  "min-hot-byte-rate": 100,
  "min-hot-key-rate": 10,
  "max-zombie-rounds": 3,
  "max-peer-number": 1000,
  "byte-rate-rank-step-ratio": 0.05,
  "key-rate-rank-step-ratio": 0.05,
  "count-rank-step-ratio": 0.01,
  "great-dec-ratio": 0.95,
  "minor-dec-ratio": 0.99,
  "src-tolerance-ratio": 1.02,
  "dst-tolerance-ratio": 1.02
}

3. What did you see instead?

» scheduler config balance-hot-region-scheduler list
[404] 404 page not found

4. What version of PD are you using (pd-server -V)?

Release Version: v4.0.0-alpha-357-g2b542f40
Git Commit Hash: 2b542f409047891764e4043abb370ecc8d5c8bbf
Git Branch: master
UTC Build Time:  2020-04-02 06:24:27