Changed referenceKeyMap entry value type to CopyOnWriteArrayList

[zrlw]

What is the purpose of the change?

see Resolving the Thread-Safety Problem in registerReferenceKeyAndBeanName Using an Overloaded computeIfAbsent #15219

org.apache.dubbo.config.spring.reference.ReferenceBeanManager.java

    public void registerReferenceKeyAndBeanName(String referenceKey, String referenceBeanNameOrAlias) {
        List<String> list =
                ConcurrentHashMapUtils.computeIfAbsent(referenceKeyMap, referenceKey, (key) -> new ArrayList<>());
        if (!list.contains(referenceBeanNameOrAlias)) {
            list.add(referenceBeanNameOrAlias);
            // register bean name as alias
            referenceAliasMap.put(referenceBeanNameOrAlias, list.get(0));
        }
    }

The ConcurrentHashMapUtils.computeIfAbsent method ensures the creation of a new list in a thread-safe manner when no list exists for the given referenceKey. However, the subsequent operations if (!list.contains(referenceBeanNameOrAlias)) and list.add(referenceBeanNameOrAlias) are not atomic. This situation can lead to thread-safety issues where multiple threads might simultaneously pass the contains check and then all perform the add operation, resulting in duplicate referenceBeanNameOrAlias entries within the list.

@AlbumenJ PTAL

Checklist

• Make sure there is a GitHub_issue field for the change.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit-test to verify your logic correction. If the new feature or significant change is committed, please remember to add sample in dubbo samples project.
• Make sure gitHub actions can pass. Why the workflow is failing and how to fix it?

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 60.77%. Comparing base (7e351ba) to head (d178544).
⚠️ Report is 174 commits behind head on 3.3.

Additional details and impacted files

@@            Coverage Diff            @@
##                3.3   #15258   +/-   ##
=========================================
  Coverage     60.76%   60.77%           
- Complexity    10892    10898    +6     
=========================================
  Files          1885     1885           
  Lines         86087    86086    -1     
  Branches      12896    12896           
=========================================
+ Hits          52312    52320    +8     
+ Misses        28324    28317    -7     
+ Partials       5451     5449    -2     

Flag	Coverage Δ
integration-tests	33.22% <100.00%> (+0.14%)	⬆️
samples-tests	29.25% <100.00%> (+0.04%)	⬆️
unit-tests	58.89% <100.00%> (-0.02%)	⬇️

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