merge global histogram failed after #52218

[Lily2025]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

1、run sysbench
2、analyze table
3、kill pd leader or kill tikv

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

analyze can succeed

3. What did you see instead (Required)

analyze failed after kill pd leader or kill one of tikv

4. What is your TiDB version? (Required)

./tidb-server -V
Release Version: v9.0.0-alpha-205-gfc8bdb5
Edition: Community
Git Commit Hash: fc8bdb5
Git Branch: HEAD
UTC Build Time: 2025-02-05 18:27:25
GoVersion: go1.23.6
Race Enabled: false
Check Table Before Drop: false
Store: unistore
2025-02-06T12:58:31.332+0800

[Lily2025]

/assign hawkingrei

[Lily2025]

/severity major