[ISSUE #3862] Change NullPointException to be explicit

[MiracleDx]

About #3862

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

Merging #3863 (fdd4bc2) into master (7909785) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #3863      +/-   ##
============================================
- Coverage     64.76%   64.74%   -0.02%     
+ Complexity     6099     6097       -2     
============================================
  Files           898      898              
  Lines         24729    24729              
  Branches       2240     2240              
============================================
- Hits          16015    16011       -4     
- Misses         7307     7311       +4     
  Partials       1407     1407              

Impacted Files	Coverage Δ
...controller/ShenyuClientHttpRegistryController.java	77.77% <0.00%> (-22.23%)	⬇️
...ruptor/RegisterClientServerDisruptorPublisher.java	52.94% <0.00%> (-11.77%)	⬇️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more