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]

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• lhy1024

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[ti-chi-bot]

This cherry pick PR is for a release branch and has not yet been approved by triage owners.
Adding the do-not-merge/cherry-pick-not-approved label.

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[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lhy1024

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