fix:395

[guonaihong]

#395

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 62.50000% with 3 lines in your changes missing coverage. Please review.

Project coverage is 81.91%. Comparing base (a7e7bd4) to head (d587ffd).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
dataflow/dataflow.go	62.50%	2 Missing and 1 partial ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #396      +/-   ##
==========================================
- Coverage   82.09%   81.91%   -0.19%     
==========================================
  Files          48       53       +5     
  Lines        1960     1979      +19     
==========================================
+ Hits         1609     1621      +12     
- Misses        278      284       +6     
- Partials       73       74       +1     

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