tests: Reproduce #18089 in robustness tests

1) Use SleepBeforeSendWatchResponse failpoint to simulate slow watch 2) Decrease compact period from 200ms to 100ms to increase the probability of compacting on Delete 3) Introduce a new traffic pattern of 50/50 Put and Delete With these three changes the `make test-robustness-issue18089` command can reproduce issue 18089. Signed-off-by: Jiayin Mao <[email protected]>
etcd-io · Jan 16, 2025 · 7590a7e · 7590a7e
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diff --git a/tests/robustness/README.md b/tests/robustness/README.md
@@ -19,7 +19,7 @@ The purpose of these tests is to rigorously validate that etcd maintains its [KV
 | Duplicated watch event due to bug in TXN caching [#17247]       | Jan 2024 | main branch     | Robustness    | Yes, prevented regression in v3.6               |                                   |
 | Watch events lost during stream starvation [#17529]             | Mar 2024 | v3.4 or earlier | User          | Yes, after covering of slow watch               | `make test-robustness-issue17529` |
 | Revision decreasing caused by crash during compaction [#17780]  | Apr 2024 | v3.4 or earlier | Robustness    | Yes, after covering compaction                  |                                   |
-| Watch dropping an event when compacting on delete [#18089]      | May 2024 | v3.4 or earlier | Robustness    | Yes, after covering of compaction               |                                   |
+| Watch dropping an event when compacting on delete [#18089]      | May 2024 | v3.4 or earlier | Robustness    | Yes, after covering of compaction               | `make test-robustness-issue18089` |
 | Inconsistency when reading compacted revision in TXN [#18667]   | Oct 2024 | v3.4 or earlier | User          |                                                 |                                   |
 
 [#13766]: https://github.com/etcd-io/etcd/issues/13766

diff --git a/tests/robustness/main_test.go b/tests/robustness/main_test.go
@@ -41,7 +41,7 @@ var testRunner = framework.E2eTestRunner
 
 var (
 	WaitBeforeFailpoint = time.Second
-	WaitJitter          = traffic.CompactionPeriod
+	WaitJitter          = traffic.DefaultCompactionPeriod
 	WaitAfterFailpoint  = time.Second
 )
 

diff --git a/tests/robustness/makefile.mk b/tests/robustness/makefile.mk
@@ -49,6 +49,11 @@ test-robustness-issue17780: /tmp/etcd-v3.5.13-compactBeforeSetFinishedCompact/bi
 	GO_TEST_FLAGS='-v --run=TestRobustnessRegression/Issue17780 --count 200 --failfast --bin-dir=/tmp/etcd-v3.5.13-compactBeforeSetFinishedCompact/bin' make test-robustness && \
 	  echo "Failed to reproduce" || echo "Successful reproduction"
 
+.PHONY: test-robustness-issue18089
+test-robustness-issue18089: /tmp/etcd-v3.5.12-beforeSendWatchResponse/bin
+	GO_TEST_FLAGS='-v -run=TestRobustnessRegression/Issue18089 -count 100 -failfast --bin-dir=/tmp/etcd-v3.5.12-beforeSendWatchResponse/bin' make test-robustness && \
+	  echo "Failed to reproduce" || echo "Successful reproduction"
+
 # Failpoints
 
 GOPATH = $(shell go env GOPATH)

diff --git a/tests/robustness/scenarios/scenarios.go b/tests/robustness/scenarios/scenarios.go
@@ -223,6 +223,16 @@ func Regression(t *testing.T) []TestScenario {
 			e2e.WithGoFailEnabled(true),
 		),
 	})
+	scenarios = append(scenarios, TestScenario{
+		Name:      "Issue18089",
+		Profile:   traffic.LowTraffic.WithCompactionPeriod(100 * time.Millisecond), // Use frequent compaction for high reproduce rate
+		Failpoint: failpoint.SleepBeforeSendWatchResponse,
+		Traffic:   traffic.EtcdDelete,
+		Cluster: *e2e.NewConfig(
+			e2e.WithClusterSize(1),
+			e2e.WithGoFailEnabled(true),
+		),
+	})
 	if v.Compare(version.V3_5) >= 0 {
 		opts := []e2e.EPClusterOption{
 			e2e.WithSnapshotCount(100),

diff --git a/tests/robustness/traffic/etcd.go b/tests/robustness/traffic/etcd.go
@@ -64,6 +64,16 @@ var (
 			{Choice: Put, Weight: 40},
 		},
 	}
+	EtcdDelete Traffic = etcdTraffic{
+		keyCount:     10,
+		largePutSize: 32769,
+		leaseTTL:     DefaultLeaseTTL,
+		// Please keep the sum of weights equal 100.
+		requests: []random.ChoiceWeight[etcdRequestType]{
+			{Choice: Put, Weight: 50},
+			{Choice: Delete, Weight: 50},
+		},
+	}
 )
 
 type etcdTraffic struct {

diff --git a/tests/robustness/traffic/traffic.go b/tests/robustness/traffic/traffic.go
@@ -33,11 +33,11 @@ import (
 )
 
 var (
-	DefaultLeaseTTL   int64 = 7200
-	RequestTimeout          = 200 * time.Millisecond
-	WatchTimeout            = time.Second
-	MultiOpTxnOpCount       = 4
-	CompactionPeriod        = 200 * time.Millisecond
+	DefaultLeaseTTL         int64 = 7200
+	RequestTimeout                = 200 * time.Millisecond
+	WatchTimeout                  = time.Second
+	MultiOpTxnOpCount             = 4
+	DefaultCompactionPeriod       = 200 * time.Millisecond
 
 	LowTraffic = Profile{
 		MinimalQPS:                     100,
@@ -96,7 +96,11 @@ func SimulateTraffic(ctx context.Context, t *testing.T, lg *zap.Logger, clus *e2
 			defer wg.Done()
 			defer c.Close()
 
-			RunCompactLoop(ctx, c, CompactionPeriod, finish)
+			compactionPeriod := DefaultCompactionPeriod
+			if profile.CompactPeriod != time.Duration(0) {
+				compactionPeriod = profile.CompactPeriod
+			}
+			RunCompactLoop(ctx, c, compactionPeriod, finish)
 			mux.Lock()
 			reports = append(reports, c.Report())
 			mux.Unlock()
@@ -176,13 +180,19 @@ type Profile struct {
 	MaxNonUniqueRequestConcurrency int
 	ClientCount                    int
 	ForbidCompaction               bool
+	CompactPeriod                  time.Duration
 }
 
 func (p Profile) WithoutCompaction() Profile {
 	p.ForbidCompaction = true
 	return p
 }
 
+func (p Profile) WithCompactionPeriod(cp time.Duration) Profile {
+	p.CompactPeriod = cp
+	return p
+}
+
 type Traffic interface {
 	Run(ctx context.Context, c *client.RecordingClient, qpsLimiter *rate.Limiter, ids identity.Provider, lm identity.LeaseIDStorage, nonUniqueWriteLimiter ConcurrencyLimiter, finish <-chan struct{})
 	ExpectUniqueRevision() bool