fix:fix instance detect wrong result.

[SkyeBeFreeman]

No description provided.

[fuyuwei01]

LGTM

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 19.79%. Comparing base (084070f) to head (87de80a).
⚠️ Report is 1 commits behind head on release/2.1.0.x.

Files with missing lines	Patch %	Lines
...ris/discovery/client/stat/InstancesDetectTask.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@                  Coverage Diff                  @@
##             release/2.1.0.x     #668      +/-   ##
=====================================================
- Coverage              19.82%   19.79%   -0.04%     
+ Complexity               942      941       -1     
=====================================================
  Files                    373      373              
  Lines                  15566    15568       +2     
  Branches                1994     1995       +1     
=====================================================
- Hits                    3086     3081       -5     
- Misses                 12097    12101       +4     
- Partials                 383      386       +3     

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