What is the purpose of the change

1. Make ExceptionHandler support handling grpc exceptions
2. Converge exception handling to onError
3. Fix grpc not correctly close stream error when contentType is not grpc

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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