faq建设

[asa3311]

FailbackClusterInvoker类错误码改造。

What is the purpose of the change

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.
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• If this contribution is large, please follow the Software Donation Guide.

[codecov-commenter]

Codecov Report

Merging #10536 (517a79e) into 3.1 (bb7f942) will decrease coverage by 0.11%.
The diff coverage is 83.33%.

@@             Coverage Diff              @@
##                3.1   #10536      +/-   ##
============================================
- Coverage     64.74%   64.63%   -0.12%     
- Complexity      373      395      +22     
============================================
  Files          1331     1331              
  Lines         56509    56509              
  Branches       8369     8370       +1     
============================================
- Hits          36587    36524      -63     
- Misses        15978    16023      +45     
- Partials       3944     3962      +18     

Impacted Files	Coverage Δ
...bo/rpc/cluster/support/FailbackClusterInvoker.java	78.46% <83.33%> (ø)
...nt/metadata/ServiceInstanceHostPortCustomizer.java	65.78% <0.00%> (-21.06%)	⬇️
...e/dubbo/rpc/protocol/tri/transport/WriteQueue.java	64.28% <0.00%> (-14.29%)	⬇️
...che/dubbo/registry/client/NopServiceDiscovery.java	44.44% <0.00%> (-11.12%)	⬇️
...va/org/apache/dubbo/remoting/TimeoutException.java	22.22% <0.00%> (-11.12%)	⬇️
...dubbo/common/status/support/LoadStatusChecker.java	58.33% <0.00%> (-8.34%)	⬇️
...dubbo/remoting/exchange/support/DefaultFuture.java	80.17% <0.00%> (-7.76%)	⬇️
.../common/threadpool/serial/SerializingExecutor.java	70.37% <0.00%> (-7.41%)	⬇️
...ava/org/apache/dubbo/rpc/proxy/InvocationUtil.java	84.84% <0.00%> (-6.07%)	⬇️
...ubbo/common/system/OperatingSystemBeanManager.java	50.00% <0.00%> (-4.55%)	⬇️
... and 24 more

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