[funky-eyes]

What is the purpose of the change

fixes #10826

Brief changelog

Verifying this change

Checklist

• Make sure there is a GitHub_issue field for the change (usually before you start working on it). Trivial changes like typos do not require a GitHub issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
• Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Check if is necessary to patch to Dubbo 3 if you are work on Dubbo 2.7
• Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add sample in dubbo samples project.
• Add some description to dubbo-website project if you are requesting to add a feature.
• GitHub Actions works fine on your own branch.
• If this contribution is large, please follow the Software Donation Guide.

[AlbumenJ]

Will this override port configuration?

[funky-eyes]

Will this override port configuration?

No, it will only work on variables with null values

[codecov-commenter]

Codecov Report

Merging #10855 (31aae5e) into 3.1 (a0367b7) will decrease coverage by 3.80%.
The diff coverage is 75.00%.

@@             Coverage Diff              @@
##                3.1   #10855      +/-   ##
============================================
- Coverage     68.39%   64.59%   -3.81%     
+ Complexity      534      469      -65     
============================================
  Files          1358     1336      -22     
  Lines         68917    56997   -11920     
  Branches      11945     8405    -3540     
============================================
- Hits          47135    36815   -10320     
+ Misses        17407    16223    -1184     
+ Partials       4375     3959     -416     

Impacted Files	Coverage Δ
...n/java/org/apache/dubbo/config/ProtocolConfig.java	82.46% <64.70%> (-5.80%)	⬇️
...org/apache/dubbo/common/utils/CollectionUtils.java	80.98% <88.88%> (+0.46%)	⬆️
.../metadata/ConfigurableMetadataServiceExporter.java	78.78% <100.00%> (-3.38%)	⬇️
...luster/router/script/ScriptStateRouterFactory.java	0.00% <0.00%> (-100.00%)	⬇️
...zookeeper/curator/CuratorZookeeperTransporter.java	0.00% <0.00%> (-100.00%)	⬇️
...pc/cluster/router/file/FileStateRouterFactory.java	0.00% <0.00%> (-80.96%)	⬇️
...o/rpc/cluster/router/script/ScriptStateRouter.java	0.00% <0.00%> (-73.34%)	⬇️
...ting/zookeeper/curator/CuratorZookeeperClient.java	15.38% <0.00%> (-62.83%)	⬇️
...mmon/serialize/fastjson2/FastJson2ObjectInput.java	0.00% <0.00%> (-62.50%)	⬇️
...mon/serialize/fastjson2/FastJson2ObjectOutput.java	0.00% <0.00%> (-56.25%)	⬇️
... and 363 more

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[AlbumenJ]

LGTM