br: ensure schemaLease is the normal (45s) instead of test value (1s) (#66092)

close #66110

Author: kennytm

br/pkg/gluetidb/BUILD.bazel

@@ -25,6 +25,7 @@ go_library(
         "//pkg/session",
         "//pkg/session/sessionapi",
         "//pkg/sessionctx",
+        "//pkg/sessionctx/vardef",
         "@com_github_pingcap_errors//:errors",
         "@com_github_pingcap_log//:log",
         "@com_github_tikv_pd_client//:client",

br/pkg/gluetidb/glue.go

@@ -25,6 +25,7 @@ import (
 	"github.com/pingcap/tidb/pkg/session"
 	"github.com/pingcap/tidb/pkg/session/sessionapi"
 	"github.com/pingcap/tidb/pkg/sessionctx"
+	"github.com/pingcap/tidb/pkg/sessionctx/vardef"
 	pd "github.com/tikv/pd/client"
 	"go.uber.org/zap"
 )
@@ -40,6 +41,9 @@ const brComment = `/*from(br)*/`
 // New makes a new tidb glue.
 func New() Glue {
 	log.Debug("enabling no register config")
+	// Set schema lease to production value (45s) instead of test default (1s)
+	// to prevent BR from getting stuck when PD TSO slightly lags wall clock.
+	vardef.SetSchemaLease(config.DefSchemaLease)
 	config.UpdateGlobal(func(conf *config.Config) {
 		conf.SkipRegisterToDashboard = true
 		conf.Log.EnableSlowLog.Store(false)