check invalid keepers before reset

[lilongjiao]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 85.71429% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 53.86%. Comparing base (830965b) to head (dcaec0a).
Report is 11 commits behind head on master.

❗ Current head dcaec0a differs from pull request most recent head 898dac7. Consider uploading reports for the commit 898dac7 to get more accurate results

Files	Patch %	Lines
...ons/sentinel/collector/command/ResetSentinels.java	85.71%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #795      +/-   ##
============================================
+ Coverage     53.83%   53.86%   +0.02%     
- Complexity    10440    10455      +15     
============================================
  Files          1794     1794              
  Lines         56347    56390      +43     
  Branches       5899     5905       +6     
============================================
+ Hits          30337    30372      +35     
- Misses        23409    23421      +12     
+ Partials       2601     2597       -4     

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