election: fix the keep alive worker

[rleungx]

What problem does this PR solve?

Issue Number: Close #6926.

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:

• JmPotato
• lhy1024

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[codecov]

Codecov Report

Merging #6925 (0183048) into master (38d087f) will decrease coverage by 0.05%.
Report is 1 commits behind head on master.
The diff coverage is 33.33%.

❗ Current head 0183048 differs from pull request most recent head 07d9fdb. Consider uploading reports for the commit 07d9fdb to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6925      +/-   ##
==========================================
- Coverage   74.39%   74.35%   -0.05%     
==========================================
  Files         427      427              
  Lines       45163    45151      -12     
==========================================
- Hits        33598    33570      -28     
- Misses       8600     8632      +32     
+ Partials     2965     2949      -16     

Flag	Coverage Δ
unittests	74.35% <33.33%> (-0.05%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

[lhy1024]

Do we also need to pick it to other branches?

[nolouch]

/merge

[ti-chi-bot]

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/run-all-tests

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[ti-chi-bot]

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

Commit hash: 471239c

[rleungx]

/check-issue-triage-complete

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-5.3: #6937.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-5.4: #6938.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.1: #6939.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #6940.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #6941.