cluster: fix display exception

[srstack]

What problem does this PR solve?

just add lock （

What is changed and how it works?

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Code changes

• Has exported function/method change
• Has exported variable/fields change
• Has interface methods change
• Has persistent data change

Side effects

• Possible performance regression
• Increased code complexity
• Breaking backward compatibility

Related changes

• Need to cherry-pick to the release branch
• Need to update the documentation

Release notes:

NONE

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• AstroProfundis

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[codecov-commenter]

Codecov Report

Merging #1889 (ddee7dd) into master (bdac542) will decrease coverage by 2.49%.
The diff coverage is 62.50%.

❗ Current head ddee7dd differs from pull request most recent head 09f09ad. Consider uploading reports for the commit 09f09ad to get more accurate results

@@            Coverage Diff             @@
##           master    #1889      +/-   ##
==========================================
- Coverage   52.86%   50.36%   -2.49%     
==========================================
  Files         307      307              
  Lines       35153    35161       +8     
==========================================
- Hits        18581    17708     -873     
- Misses      14387    15335     +948     
+ Partials     2185     2118      -67     

Flag	Coverage Δ
cluster	36.58% <62.50%> (-4.65%)	⬇️
unittest	21.20% <0.00%> (-0.01%)	⬇️

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

Impacted Files	Coverage Δ
pkg/cluster/manager/display.go	45.80% <62.50%> (-3.66%)	⬇️
pkg/cluster/task/update_meta.go	0.00% <0.00%> (-84.95%)	⬇️
pkg/cluster/template/config/ngmonitoring.go	0.00% <0.00%> (-76.47%)	⬇️
pkg/cluster/task/action.go	0.00% <0.00%> (-60.98%)	⬇️
components/cluster/command/scale_out.go	26.98% <0.00%> (-57.14%)	⬇️
pkg/cluster/operation/scale_in.go	0.00% <0.00%> (-55.13%)	⬇️
components/cluster/command/scale_in.go	36.67% <0.00%> (-53.33%)	⬇️
components/cluster/command/prune.go	43.75% <0.00%> (-37.50%)	⬇️
pkg/cluster/api/binlog.go	5.76% <0.00%> (-32.98%)	⬇️
pkg/cluster/manager/destroy.go	24.39% <0.00%> (-30.89%)	⬇️
... and 29 more

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[AstroProfundis]

/merge

[ti-chi-bot]

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

Commit hash: 09f09ad