fix 305

[kexianjun]

fix #305

[codecov-io]

Codecov Report

Merging #306 into develop will decrease coverage by 0.08%.
The diff coverage is 25%.

@@             Coverage Diff              @@
##             develop    #306      +/-   ##
============================================
- Coverage      19.38%   19.3%   -0.09%     
+ Complexity       289     288       -1     
============================================
  Files             91      91              
  Lines           3637    3637              
  Branches         566     566              
============================================
- Hits             705     702       -3     
- Misses          2857    2860       +3     
  Partials          75      75

Impacted Files	Coverage Δ	Complexity Δ
...e/dubbo/admin/service/impl/GenericServiceImpl.java	41.17% <25%> (-17.65%)	2 <0> (ø)

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