schedule: fix the down peer cannot be repaired (#7996)

[ti-chi-bot]

This is an automated cherry-pick of #7996

What problem does this PR solve?

Issue Number: Close #7808.

What is changed and how does it work?

Check List

Tests

• Unit test

Release note

None.

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• HuSharp
• lhy1024

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[lhy1024]

@rleungx Will we merge it?

[HuSharp]

/merge

[ti-chi-bot]

@HuSharp: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

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[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 887f1fd