Close the connection but not the client

[icodening]

What is the purpose of the change

Close the connection but not the client
optimize #13546

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.
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• 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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[sonarcloud]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
25.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1bdbfd8) 70.37% compared to head (e22b021) 70.35%.
Report is 1 commits behind head on 3.2.

Additional details and impacted files

@@            Coverage Diff             @@
##              3.2   #13600      +/-   ##
==========================================
- Coverage   70.37%   70.35%   -0.02%     
==========================================
  Files        1606     1606              
  Lines       69997    69999       +2     
  Branches    10098    10098              
==========================================
- Hits        49260    49250      -10     
- Misses      16111    16115       +4     
- Partials     4626     4634       +8     

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[EarthChen]

LGTM

[wilsonwu]

Seems this change with problem, not sure if only set channel status to null will cause problem or not? Maybe need dubbo or netty expert to help to answer.

Because we found some problems that 3.2.11 version work with istio, suggest to evaluate and test this change again.

[wilsonwu]

We downgrade to 3.2.10, till now, all works fine.

[wilsonwu]

Confirmed that the 3.2.10 resolved our problems, no errors for connection.