use the right way to wait tiflash replica ready in least_greatest.test

[windtalker]

Signed-off-by: xufei xufeixw@mail.ustc.edu.cn

What problem does this PR solve?

Issue Number: close #4316

Problem Summary:
As the issue described.

What is changed and how it works?

The root cause is least_greatest.test use a wrong way to wait tiflash replica ready, so actually the wait is timeout after 600 seconds.

Check List

Tests

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

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• solotzg
• yibin87

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[yibin87]

LGTM

[solotzg]

Can we modify the scripts to check syntax ? Someone else may make same mistake.

[windtalker]

/merge

[ti-chi-bot]

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[ti-chi-bot]

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

Commit hash: 5e0e2ba

[sre-bot]

Coverage for changed files

no c/c++ source change detected

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
16971      9542             43.77%    191209  96831        49.36%

full coverage report (for internal network access only)

[windtalker]

Can we modify the scripts to check syntax ? Someone else may make same mistake.

Yes, I think we need to improve this.