[ISSUE #8328] Fix map init

[ChineseTony]

Which Issue(s) This PR Fixes

Fixes #8328

Brief Description

How Did You Test This Change?

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 84.21053% with 3 lines in your changes missing coverage. Please review.

Project coverage is 47.36%. Comparing base (b330130) to head (7ad92c8).
Report is 120 commits behind head on develop.

Files with missing lines	Patch %	Lines
...pache/rocketmq/remoting/common/RemotingHelper.java	76.92%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##             develop    #8329      +/-   ##
=============================================
+ Coverage      42.99%   47.36%   +4.36%     
- Complexity     10464    11554    +1090     
=============================================
  Files           1274     1282       +8     
  Lines          88940    89812     +872     
  Branches       11434    11553     +119     
=============================================
+ Hits           38242    42537    +4295     
+ Misses         45988    42030    -3958     
- Partials        4710     5245     +535     

Flag	Coverage Δ
	47.36% <84.21%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.