[Bug] [LinkisManager] Fix EC reuse request do not exit

[peacewong]

What is the purpose of the change

EC reuse request do not exit #4825

Related issues/PRs

Related issues: #4825

Checklist

• [x] I have read the Contributing Guidelines on pull requests.
• [ ] I have explained the need for this PR and the problem it solves
• [ ] I have explained the changes or the new features added to this PR
• [ ] I have added tests corresponding to this change
• [ ] I have updated the documentation to reflect this change
• [ ] I have verified that this change is backward compatible (If not, please discuss on the Linkis mailing list first)
• [ ] If this is a code change: I have written unit tests to fully verify the new behavior.

[ChengJie1053]

LGTM