fixed #5340.

[wlngo]

Make sure that:

• [ ] You have read the contribution guidelines.
• [ ] You submit test cases (unit or integration tests) that back your changes.
• [ ] Your local test passed ./mvnw clean install -Dmaven.javadoc.skip=true.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 20.00000% with 12 lines in your changes are missing coverage. Please review.

Project coverage is 61.49%. Comparing base (1875f71) to head (c3891b1).

Files	Patch %	Lines
...in/ratelimiter/resolver/RemoteAddrKeyResolver.java	20.00%	10 Missing and 2 partials :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5504      +/-   ##
============================================
- Coverage     61.64%   61.49%   -0.16%     
+ Complexity     8843     8812      -31     
============================================
  Files          1261     1261              
  Lines         39227    39242      +15     
  Branches       3723     3730       +7     
============================================
- Hits          24183    24132      -51     
- Misses        12873    12932      +59     
- Partials       2171     2178       +7     

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