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test/region_syncer: make TestPrepareCheckerWithTransferLeader more stable #8357

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merged 2 commits into from
Jul 4, 2024
Merged

test/region_syncer: make TestPrepareCheckerWithTransferLeader more stable #8357

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db60750
fix test
HuSharp Jul 3, 2024
7351cbe
Merge branch 'master' into fix_prepare_checker_tesy
ti-chi-bot[bot] Jul 4, 2024
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2 changes: 1 addition & 1 deletion Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -254,7 +254,7 @@ basic-test: install-tools

ci-test-job: install-tools dashboard-ui pd-ut
@$(FAILPOINT_ENABLE)
./scripts/ci-subtask.sh $(JOB_COUNT) $(JOB_INDEX) || { $(FAILPOINT_DISABLE); exit 1; }
./scripts/ci-subtask.sh $(JOB_INDEX) || { $(FAILPOINT_DISABLE); exit 1; }
@$(FAILPOINT_DISABLE)

TSO_INTEGRATION_TEST_PKGS := $(PD_PKG)/tests/server/tso
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2 changes: 1 addition & 1 deletion scripts/ci-subtask.sh
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@@ -1,6 +1,6 @@
#!/usr/bin/env bash

# ./ci-subtask.sh <TOTAL_TASK_N> <TASK_INDEX>
# ./ci-subtask.sh <TASK_INDEX>

ROOT_PATH_COV=$(pwd)/covprofile
ROOT_PATH_JUNITFILE=$(pwd)/junitfile
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16 changes: 12 additions & 4 deletions tests/server/region_syncer/region_syncer_test.go
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Expand Up @@ -234,11 +234,13 @@ func TestPrepareChecker(t *testing.T) {
re.NoError(err)
err = pd2.Run()
re.NoError(err)
re.NotEmpty(cluster.WaitLeader())
// waiting for synchronization to complete
time.Sleep(3 * time.Second)
leaderServer = cluster.GetLeaderServer()
err = cluster.ResignLeader()
re.NoError(err)
re.Equal("pd2", cluster.WaitLeader())
re.NotEqual(leaderServer.GetServer().Name(), cluster.WaitLeader())
leaderServer = cluster.GetLeaderServer()
rc = leaderServer.GetServer().GetRaftCluster()
for _, region := range regions {
Expand Down Expand Up @@ -282,16 +284,22 @@ func TestPrepareCheckerWithTransferLeader(t *testing.T) {
re.NoError(err)
err = pd2.Run()
re.NoError(err)
re.NotEmpty(cluster.WaitLeader())
// waiting for synchronization to complete
time.Sleep(3 * time.Second)
leaderServer = cluster.GetLeaderServer()
err = cluster.ResignLeader()
re.NoError(err)
re.Equal("pd2", cluster.WaitLeader())
re.NotEqual(leaderServer.GetServer().Name(), cluster.WaitLeader())
rc = cluster.GetLeaderServer().GetRaftCluster()
re.True(rc.IsPrepared())

// transfer leader to pd1, can start coordinator immediately.
// transfer leader, can start coordinator immediately.
leaderServer = cluster.GetLeaderServer()
err = cluster.ResignLeader()
re.NoError(err)
re.Equal("pd1", cluster.WaitLeader())
re.NotEqual(leaderServer.GetLeader().GetName(), cluster.WaitLeader())
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@rleungx rleungx Jul 3, 2024 •
edited
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What if the WaitLeader still returns ""?

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If we don't get a reasonable leader, maybe we can assume the test has failed?

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The previous failure is caused by no leader and after this PR, will it still fail?

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I added a detailed explanation in
#8351 (comment)

I think in this extreme situation, we can fail directly.

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@HuSharp HuSharp Jul 4, 2024 •
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I created an issue to focus on the Waitleader failure situation :) #8359

rc = cluster.GetLeaderServer().GetServer().GetRaftCluster()
re.True(rc.IsPrepared())
re.NoError(failpoint.Disable("github.com/tikv/pd/pkg/schedule/changeCoordinatorTicker"))
}