flaky test TestTiKVClientReadTimeout #57348

     testkit.go:241: 
        	Error Trace:	pkg/testkit/testkit.go:241
        	            				pkg/testkit/testkit.go:176
        	            				pkg/executor/executor_failpoint_test.go:618
        	Error:      	Received unexpected error:
        	            	cannot set read timestamp to a future time
        	            	github.com/tikv/client-go/v2/oracle/oracles.(*pdOracle).ValidateSnapshotReadTS
        	            		external/com_github_tikv_client_go_v2/oracle/oracles/pd.go:675
        	            	github.com/pingcap/tidb/pkg/sessionctx.ValidateSnapshotReadTS
        	            		pkg/sessionctx/context.go:245
        	            	github.com/pingcap/tidb/pkg/sessiontxn/staleread.parseAndValidateAsOf
        	            		pkg/sessiontxn/staleread/processor.go:289
        	            	github.com/pingcap/tidb/pkg/sessiontxn/staleread.(*staleReadProcessor).OnSelectTable.func1
        	            		pkg/sessiontxn/staleread/processor.go:172
        	            	github.com/pingcap/tidb/pkg/sessiontxn/staleread.(*staleReadProcessor).OnSelectTable
        	            		pkg/sessiontxn/staleread/processor.go:174
        	            	github.com/pingcap/tidb/pkg/planner/core.(*preprocessor).handleTableName
        	            		pkg/planner/core/preprocess.go:1606
        	            	github.com/pingcap/tidb/pkg/planner/core.(*preprocessor).Leave
        	            		pkg/planner/core/preprocess.go:612
        	            	github.com/pingcap/tidb/pkg/parser/ast.(*TableName).Accept
        	            		pkg/parser/ast/dml.go:445
        	            	github.com/pingcap/tidb/pkg/parser/ast.(*TableSource).Accept
        	            		pkg/parser/ast/dml.go:601
        	            	github.com/pingcap/tidb/pkg/parser/ast.(*Join).Accept
        	            		pkg/parser/ast/dml.go:244
        	            	github.com/pingcap/tidb/pkg/parser/ast.(*TableRefsClause).Accept
        	            		pkg/parser/ast/dml.go:824
        	            	github.com/pingcap/tidb/pkg/parser/ast.(*SelectStmt).Accept
        	            		pkg/parser/ast/dml.go:1496
        	            	github.com/pingcap/tidb/pkg/parser/ast.(*ExplainStmt).Accept
        	            		pkg/parser/ast/misc.go:254
        	            	github.com/pingcap/tidb/pkg/planner/core.Preprocess
        	            		pkg/planner/core/preprocess.go:144
        	            	github.com/pingcap/tidb/pkg/executor.(*Compiler).Compile
        	            		pkg/executor/compiler.go:69
        	            	github.com/pingcap/tidb/pkg/session.(*session).ExecuteStmt
        	            		pkg/session/session.go:2098
        	            	github.com/pingcap/tidb/pkg/testkit.(*TestKit).ExecWithContext
        	            		pkg/testkit/testkit.go:425
        	            	github.com/pingcap/tidb/pkg/testkit.(*TestKit).MustQueryWithContext
        	            		pkg/testkit/testkit.go:240
        	            	github.com/pingcap/tidb/pkg/testkit.(*TestKit).MustQuery
        	            		pkg/testkit/testkit.go:176
        	            	github.com/pingcap/tidb/pkg/executor_test.TestTiKVClientReadTimeout
        	            		pkg/executor/executor_failpoint_test.go:618
        	            	testing.tRunner
        	            		GOROOT/src/testing/testing.go:1690
        	            	runtime.goexit
        	            		src/runtime/asm_amd64.s:1700
        	            	github.com/pingcap/errors.AddStack
        	            		external/com_github_pingcap_errors/errors.go:178
        	            	github.com/pingcap/errors.Trace
        	            		external/com_github_pingcap_errors/juju_adaptor.go:15
        	            	github.com/pingcap/tidb/pkg/planner/core.Preprocess
        	            		pkg/planner/core/preprocess.go:147
        	            	github.com/pingcap/tidb/pkg/executor.(*Compiler).Compile
        	            		pkg/executor/compiler.go:69
        	            	github.com/pingcap/tidb/pkg/session.(*session).ExecuteStmt
        	            		pkg/session/session.go:2098
        	            	github.com/pingcap/tidb/pkg/testkit.(*TestKit).ExecWithContext
        	            		pkg/testkit/testkit.go:425
        	            	github.com/pingcap/tidb/pkg/testkit.(*TestKit).MustQueryWithContext
        	            		pkg/testkit/testkit.go:240
        	            	github.com/pingcap/tidb/pkg/testkit.(*TestKit).MustQuery
        	            		pkg/testkit/testkit.go:176
        	            	github.com/pingcap/tidb/pkg/executor_test.TestTiKVClientReadTimeout
        	            		pkg/executor/executor_failpoint_test.go:618
        	            	testing.tRunner
        	            		GOROOT/src/testing/testing.go:1690
        	            	runtime.goexit
        	            		src/runtime/asm_amd64.s:1700
        	Test:       	TestTiKVClientReadTimeout
        	Messages:   	sql:explain analyze select /*+ set_var(tikv_client_read_timeout=1) */ * from t as of timestamp(@a) where b > 1, args:[]