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TestForwardTestSuite is flaky in next-gen #10200

@okJiang

Description

@okJiang

Flaky Test

Which jobs are failing

TestForwardTestSuite

    testutil.go:622: 
        	Error Trace:	/home/prow/go/src/github.com/tikv/pd/tests/testutil.go:622
        	            				/home/prow/go/src/github.com/tikv/pd/tests/testutil.go:591
        	            				/home/prow/go/src/github.com/tikv/pd/tests/testutil.go:412
        	            				/home/prow/go/src/github.com/tikv/pd/tests/server/api/api_test.go:1027
        	            				/home/prow/go/pkg/mod/github.com/stretchr/testify@v1.10.0/suite/suite.go:157
        	            				/home/prow/go/src/github.com/tikv/pd/tests/server/api/api_test.go:1018
        	Error:      	Received unexpected error:
        	            	Etcd cluster ID mismatch, expect 9210147299642074314, got 6474684432105739760
        	            	github.com/tikv/pd/pkg/utils/etcdutil.CheckClusterID
        	            		/home/prow/go/src/github.com/tikv/pd/pkg/utils/etcdutil/etcdutil.go:103
        	            	github.com/tikv/pd/server.(*Server).startEtcd
        	            		/home/prow/go/src/github.com/tikv/pd/server/server.go:352
        	            	github.com/tikv/pd/server.(*Server).Run
        	            		/home/prow/go/src/github.com/tikv/pd/server/server.go:627
        	            	github.com/tikv/pd/tests.(*TestServer).Run
        	            		/home/prow/go/src/github.com/tikv/pd/tests/cluster.go:149
        	            	github.com/tikv/pd/tests.RunServer.func1
        	            		/home/prow/go/src/github.com/tikv/pd/tests/cluster.go:652
        	            	runtime.goexit
        	            		/usr/local/go/src/runtime/asm_amd64.s:1693
        	            	github.com/tikv/pd/tests.RunServers
        	            		/home/prow/go/src/github.com/tikv/pd/tests/cluster.go:664
        	            	github.com/tikv/pd/tests.(*TestCluster).runInitialServersWithRetry
        	            		/home/prow/go/src/github.com/tikv/pd/tests/cluster.go:687
        	            	github.com/tikv/pd/tests.(*TestCluster).RunInitialServers
        	            		/home/prow/go/src/github.com/tikv/pd/tests/cluster.go:672
        	            	github.com/tikv/pd/tests.(*SchedulingTestEnvironment).startCluster
        	            		/home/prow/go/src/github.com/tikv/pd/tests/testutil.go:621
        	            	github.com/tikv/pd/tests.(*SchedulingTestEnvironment).runFuncInNonMicroserviceEnv
        	            		/home/prow/go/src/github.com/tikv/pd/tests/testutil.go:591
        	            	github.com/tikv/pd/tests.(*SchedulingTestEnvironment).RunFunc
        	            		/home/prow/go/src/github.com/tikv/pd/tests/testutil.go:412
        	            	github.com/tikv/pd/tests/server/api.(*forwardTestSuite).SetupSuite
        	            		/home/prow/go/src/github.com/tikv/pd/tests/server/api/api_test.go:1027
        	            	github.com/stretchr/testify/suite.Run
        	            		/home/prow/go/pkg/mod/github.com/stretchr/testify@v1.10.0/suite/suite.go:157
        	            	github.com/tikv/pd/tests/server/api.TestForwardTestSuite
        	            		/home/prow/go/src/github.com/tikv/pd/tests/server/api/api_test.go:1018
        	            	testing.tRunner
        	            		/usr/local/go/src/testing/testing.go:1934
        	            	runtime.goexit
        	            		/usr/local/go/src/runtime/asm_amd64.s:1693
        	Test:       	TestForwardTestSuite
--- FAIL: TestForwardTestSuite (0.29s)

CI link

https://prow.tidb.net/view/gs/prow-tidb-logs/pr-logs/pull/tikv_pd/10181/pull-unit-test-next-gen-2/2018202086189043712

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