align with go json unmarshal

[tg123]

fix #1396

[codecov-commenter]

Codecov Report

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@@            Coverage Diff            @@
##             master    #1397   +/-   ##
=========================================
  Coverage          ?   70.52%           
=========================================
  Files             ?       89           
  Lines             ?     2694           
  Branches          ?        0           
=========================================
  Hits              ?     1900           
  Misses            ?      794           
  Partials          ?        0           

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[brendandburns]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: brendandburns, tg123

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