[bug fiexd]A nullpointerEXException occurred when starting example-springcloud with nacos configuration.

[SuperMonkeyC]

A nullpointerEXException occurred when starting example-springcloud with nacos configuration. The associated code is in org.apache.shenyu.register.client.nacos.NacosClientRegisterRepository:nacosProperties.put(PropertyKeyConst.NAMESPACE, properties.getProperty(NAMESPACE));

Make sure that:

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

[codecov-commenter]

Codecov Report

Merging #4396 (845f2f2) into master (175459c) will decrease coverage by 0.04%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #4396      +/-   ##
============================================
- Coverage     68.25%   68.21%   -0.04%     
+ Complexity     7510     7491      -19     
============================================
  Files          1020     1020              
  Lines         28871    28871              
  Branches       2579     2579              
============================================
- Hits          19705    19695      -10     
- Misses         7624     7632       +8     
- Partials       1542     1544       +2     

Impacted Files	Coverage Δ
...controller/ShenyuClientHttpRegistryController.java	63.63% <0.00%> (-18.19%)	⬇️
...ruptor/RegisterClientServerDisruptorPublisher.java	55.55% <0.00%> (-11.12%)	⬇️
...henyu/plugin/grpc/resolver/ShenyuNameResolver.java	56.38% <0.00%> (-7.45%)	⬇️
.../apache/shenyu/admin/model/dto/BatchCommonDTO.java	50.00% <0.00%> (-7.15%)	⬇️
...apache/shenyu/admin/model/dto/AuthPathWarpDTO.java	57.14% <0.00%> (-7.15%)	⬇️
...org/apache/shenyu/admin/model/dto/AuthPathDTO.java	58.82% <0.00%> (-5.89%)	⬇️
...a/org/apache/shenyu/admin/model/entity/BaseDO.java	52.17% <0.00%> (-4.35%)	⬇️
...che/shenyu/admin/model/vo/DashboardUserEditVO.java	60.86% <0.00%> (-4.35%)	⬇️
...ache/shenyu/admin/model/dto/DataPermissionDTO.java	59.25% <0.00%> (-3.71%)	⬇️
...rg/apache/shenyu/admin/model/page/CommonPager.java	44.82% <0.00%> (-3.45%)	⬇️
... and 29 more

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