Checking received data size and reject if not match.

[xiaoxichen]

We dont need to panic in this case, fetchData can handle this.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 67.25%. Comparing base (1a0cef8) to head (88d80c8).
Report is 91 commits behind head on master.

Files with missing lines	Patch %	Lines
src/lib/replication/repl_dev/raft_repl_dev.cpp	0.00%	3 Missing and 1 partial ⚠️

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Additional details and impacted files

@@             Coverage Diff             @@
##           master     #586       +/-   ##
===========================================
+ Coverage   56.51%   67.25%   +10.73%     
===========================================
  Files         108      109        +1     
  Lines       10300    10734      +434     
  Branches     1402     1470       +68     
===========================================
+ Hits         5821     7219     +1398     
+ Misses       3894     2817     -1077     
- Partials      585      698      +113     

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[JacksonYao287]

LG