Liqi Geng

### What problem does this PR solve? ### What is changed and how does it work? Use debug rpc to get all peer state from all of the TiKV and...

Signed-off-by: Liqi Geng ### What problem does this PR solve? Add one write stress test which simulates jiebei run batch business in the bank of pufa ### What is changed...

The extra slash after S3's endpoint address may lead to a strange error

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Please answer these questions before submitting your issue. Thanks! 1. What did you do? Add a slash after S3's endpoint address when using BR backup. E.g. http://xxxx:1234/ 2. What did...

fail: check condition only when its failpoint is open

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Signed-off-by: Liqi Geng The check-condition code in failpoint runs all the time even it is not open. It may lead to bad performance if checking the condition is very expensive...

test `cases::cancel::test_client_cancel_on_dropping` panic at > 'expected cancel, but got: RemoteStopped', tests/cases/cancel.rs:122:24 in **v0.4.x** branch https://travis-ci.org/pingcap/grpc-rs/jobs/582659999

There's some probability that many tests can panic at > 'called `Result::unwrap()` on an `Err` value: RpcFinished(None)', src/libcore/result.rs:999:5 in **v0.4.x** branch test `client_streaming::test_insecure` https://travis-ci.org/pingcap/grpc-rs/jobs/582522697 test `ping_pong::test_secure` https://travis-ci.org/pingcap/grpc-rs/jobs/582522698 test `empty_stream::test_insecure` https://travis-ci.org/pingcap/grpc-rs/jobs/582659998

See https://github.com/tikv/client-go/blob/5945fe392067dab939cd642e4d3ccd3bd9f8e5e2/internal/locate/region_cache.go#L154.

See https://github.com/tikv/client-c/issues/164

Currently, the keepalive configuration is not set for client. So if a server is shut down abnormally, the client can not detect the failure of the server side thus it...

### What version of gRPC and what language are you using? v1.44.0 c++ The related code is the same as the master branch. ### What operating system (Linux, Windows,...) and...