br restore failed when kill one of tikv or kill pd leader

[Lily2025]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

1、run br restore
2、kill one of tikv or kill pd leader or injection br network partition
3、br restore failed

2. What did you expect to see? (Required)

br restore success

3. What did you see instead (Required)

br restore failed

4. What is your TiDB version? (Required)

./tidb-server -V
Release Version: v8.4.0-alpha
Edition: Community
Git Commit Hash: f399e91
Git Branch: heads/refs/tags/v8.4.0-alpha
UTC Build Time: 2024-09-26 11:46:59
GoVersion: go1.21.10
Race Enabled: false
Check Table Before Drop: false
Store: unistore
2024-09-27T12:56:14.855+0800

[Lily2025]

/severity critical
/assign Leavrth