br: resolve stuck in backup

[Leavrth]

What problem does this PR solve?

Issue Number: close #53480

Problem Summary:
backup br stuck waiting for any response from TiKV

What changed and how does it work?

1. Add a timeout for each response, and if timeout, the context will be canceled.
2. Refresh the timeout if any response arrives.

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)

type MockBackupServer struct {
	backuppb.BackupServer
}

func (mbs *MockBackupServer) Backup(req *backuppb.BackupRequest, server backuppb.Backup_BackupServer) error {
	time.Sleep(30 * time.Second)
	return nil
}

func TestReal(t *testing.T) {
	lis, err := net.Listen("tcp", ":12345")
	require.NoError(t, err)

	s := grpc.NewServer()

	backuppb.RegisterBackupServer(s, &MockBackupServer{})
	t.Logf("server listening at %v", lis.Addr())

	var wg sync.WaitGroup
	wg.Add(1)
	go func() {
		defer wg.Done()
		err := s.Serve(lis)
		require.NoError(t, err)
	}()

	testClient(t, lis.Addr().String())

	s.Stop()
	wg.Wait()
}

func testClient(t *testing.T, addr string) {
	ctx := context.Background()
	TIMEOUT_ONE_RESPONSE = 20 * time.Second
	bfConf := backoff.DefaultConfig
	bfConf.MaxDelay = time.Second * 3
	conn, err := grpc.DialContext(
		ctx, addr,
		grpc.WithTransportCredentials(insecure.NewCredentials()),
		grpc.WithBlock(),
		grpc.WithConnectParams(grpc.ConnectParams{Backoff: bfConf}),
		grpc.WithKeepaliveParams(keepalive.ClientParameters{
			Time:    3 * time.Second,
			Timeout: 10 * time.Second,
		}),
	)
	require.NoError(t, err)

	err = doSendBackup(ctx, backuppb.NewBackupClient(conn), backuppb.BackupRequest{}, func(br *backuppb.BackupResponse) error { return nil })
	require.NoError(t, err)
}

[2024/07/18 16:27:40.619 +08:00] [WARN] [store.go:97] ["receive a backup response timeout"]
--- FAIL: TestReal (20.00s)
    /root/tidb/br/pkg/backup/store_test.go:112: server listening at [::]:12345
    /root/tidb/br/pkg/backup/store_test.go:148: 
        	Error Trace:	/root/tidb/br/pkg/backup/store_test.go:148
        	            				/root/tidb/br/pkg/backup/store_test.go:122
        	Error:      	Received unexpected error:
        	            	rpc error: code = Canceled desc = context canceled
        	Test:       	TestReal
FAIL
FAIL	github.com/pingcap/tidb/br/pkg/backup	21.130s
FAIL

• No need to test

  • I checked and no code files have been changed.

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

Please refer to Release Notes Language Style Guide to write a quality release note.

None

[tiprow]

Hi @Leavrth. Thanks for your PR.

PRs from untrusted users cannot be marked as trusted with /ok-to-test in this repo meaning untrusted PR authors can never trigger tests themselves. Collaborators can still trigger tests on the PR using /test all.

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[codecov]

Codecov Report

Attention: Patch coverage is 97.36842% with 1 line in your changes missing coverage. Please review.

Project coverage is 75.4506%. Comparing base (b41ad70) to head (5083f50).
Report is 247 commits behind head on master.

Additional details and impacted files

@@               Coverage Diff                @@
##             master     #54736        +/-   ##
================================================
+ Coverage   72.8073%   75.4506%   +2.6433%     
================================================
  Files          1558       1606        +48     
  Lines        438397     476925     +38528     
================================================
+ Hits         319185     359843     +40658     
+ Misses        99609      95270      -4339     
- Partials      19603      21812      +2209     

Flag	Coverage Δ
integration	50.6548% <84.2105%> (?)
unit	71.9014% <97.3684%> (+0.0880%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Components	Coverage Δ
dumpling	52.9567% <ø> (ø)
parser	∅ <ø> (∅)
br	61.8538% <97.3684%> (+15.9562%)	⬆️

[YuJuncen]

rest lgtm

[ti-chi-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: 3pointer, YuJuncen

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• br/OWNERS [3pointer,YuJuncen]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[ti-chi-bot]

[LGTM Timeline notifier]

Timeline:

• 2024-08-12 08:40:32.400870394 +0000 UTC m=+170917.104340040: ☑️ agreed by YuJuncen.
• 2024-08-13 06:15:19.382867806 +0000 UTC m=+248604.086337449: ☑️ agreed by 3pointer.

[Leavrth]

/ok-to-test

[tiprow]

@Leavrth: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
tidb_parser_test	5083f50	link	true	/test tidb_parser_test
fast_test_tiprow	5083f50	link	true	/test fast_test_tiprow

Full PR test history. Your PR dashboard.

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[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-8.1: #55403.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.1: #55404.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-7.5: #55405.

[ti-chi-bot]

In response to a cherrypick label: new pull request created to branch release-6.5: #55657.