diff --git a/event/monitoring.go b/event/monitoring.go
index b10d4b1213..a0f69e3d98 100644
--- a/event/monitoring.go
+++ b/event/monitoring.go
@@ -106,8 +106,9 @@ type PoolEvent struct {
 	Reason       string              `json:"reason"`
 	// ServiceID is only set if the Type is PoolCleared and the server is deployed behind a load balancer. This field
 	// can be used to distinguish between individual servers in a load balanced deployment.
-	ServiceID *primitive.ObjectID `json:"serviceId"`
-	Error     error               `json:"error"`
+	ServiceID    *primitive.ObjectID `json:"serviceId"`
+	Interruption bool                `json:"interruptInUseConnections"`
+	Error        error               `json:"error"`
 }
 
 // PoolMonitor is a function that allows the user to gain access to events occurring in the pool
diff --git a/mongo/integration/unified/collection_operation_execution.go b/mongo/integration/unified/collection_operation_execution.go
index fc5c884791..b3ea1f866c 100644
--- a/mongo/integration/unified/collection_operation_execution.go
+++ b/mongo/integration/unified/collection_operation_execution.go
@@ -1072,6 +1072,7 @@ func executeInsertOne(ctx context.Context, operation *operation) (*operationResu
 	}
 
 	res, err := coll.InsertOne(ctx, document, opts)
+	fmt.Println("insert one", err)
 	raw := emptyCoreDocument
 	if res != nil {
 		t, data, err := bson.MarshalValue(res.InsertedID)
diff --git a/mongo/integration/unified/entity.go b/mongo/integration/unified/entity.go
index 66e4a6f2de..baab16ce0e 100644
--- a/mongo/integration/unified/entity.go
+++ b/mongo/integration/unified/entity.go
@@ -136,6 +136,7 @@ type EntityMap struct {
 	successValues            map[string]int32
 	iterationValues          map[string]int32
 	clientEncryptionEntities map[string]*mongo.ClientEncryption
+	waitGroups               map[string]*sync.WaitGroup
 	evtLock                  sync.Mutex
 	closed                   atomic.Value
 	// keyVaultClientIDs tracks IDs of clients used as a keyVaultClient in ClientEncryption objects.
@@ -284,8 +285,7 @@ func (em *EntityMap) addEntity(ctx context.Context, entityType string, entityOpt
 	case "session":
 		err = em.addSessionEntity(entityOptions)
 	case "thread":
-		// TODO
-		break
+		em.waitGroups[entityOptions.ID] = new(sync.WaitGroup)
 	case "bucket":
 		err = em.addGridFSBucketEntity(entityOptions)
 	case "clientEncryption":
diff --git a/mongo/integration/unified/event_verification.go b/mongo/integration/unified/event_verification.go
index 74655dc3a3..d14601dd3d 100644
--- a/mongo/integration/unified/event_verification.go
+++ b/mongo/integration/unified/event_verification.go
@@ -61,7 +61,8 @@ type cmapEvent struct {
 	ConnectionCheckedInEvent *struct{} `bson:"connectionCheckedInEvent"`
 
 	PoolClearedEvent *struct {
-		HasServiceID *bool `bson:"hasServiceId"`
+		HasServiceID              *bool `bson:"hasServiceId"`
+		InterruptInUseConnections *bool `bson:"interruptInUseConnections"`
 	} `bson:"poolClearedEvent"`
 }
 
@@ -353,6 +354,7 @@ func verifyCMAPEvents(client *clientEntity, expectedEvents *expectedEvents) erro
 			}
 		case evt.PoolClearedEvent != nil:
 			var actual *event.PoolEvent
+			fmt.Println("PoolClearedEvent", evt.PoolClearedEvent, actual)
 			if actual, pooled, err = getNextPoolEvent(pooled, event.PoolCleared); err != nil {
 				return newEventVerificationError(idx, client, err.Error())
 			}
@@ -361,6 +363,10 @@ func verifyCMAPEvents(client *clientEntity, expectedEvents *expectedEvents) erro
 					return newEventVerificationError(idx, client, "error verifying serviceID: %v", err)
 				}
 			}
+			if expectInterruption := evt.PoolClearedEvent.InterruptInUseConnections; expectInterruption != nil && *expectInterruption != actual.Interruption {
+				return newEventVerificationError(idx, client, "expected interruptInUseConnections %v, got %v",
+					expectInterruption, actual.Interruption)
+			}
 		default:
 			return newEventVerificationError(idx, client, "no expected event set on cmapEvent instance")
 		}
diff --git a/mongo/integration/unified/testrunner_operation.go b/mongo/integration/unified/testrunner_operation.go
index 72cf3541fb..03adcca2f0 100644
--- a/mongo/integration/unified/testrunner_operation.go
+++ b/mongo/integration/unified/testrunner_operation.go
@@ -50,10 +50,10 @@ func (lp *loopArgs) iterationsStored() bool {
 	return lp.IterationsEntityID != ""
 }
 
-func executeTestRunnerOperation(ctx context.Context, operation *operation, loopDone <-chan struct{}) error {
-	args := operation.Arguments
+func executeTestRunnerOperation(ctx context.Context, op *operation, loopDone <-chan struct{}) error {
+	args := op.Arguments
 
-	switch operation.Name {
+	switch op.Name {
 	case "failPoint":
 		clientID := lookupString(args, "client")
 		client, err := entities(ctx).client(clientID)
@@ -188,14 +188,32 @@ func executeTestRunnerOperation(ctx context.Context, operation *operation, loopD
 		}
 		return nil
 	case "runOnThread":
-		// TODO
+		operationRaw, err := args.LookupErr("operation")
+		if err != nil {
+			return fmt.Errorf("'operation' argument not found in runOnThread operation")
+		}
+		threadOp := new(operation)
+		if err := operationRaw.Unmarshal(threadOp); err != nil {
+			return fmt.Errorf("error unmarshalling 'operation' argument: %v", err)
+		}
+		wg := entities(ctx).waitGroups[lookupString(args, "thread")]
+		wg.Add(1)
+		go func(op *operation) {
+			defer wg.Done()
+			err := op.execute(context.Background(), nil)
+			if err != nil {
+				fmt.Println("thread error", err)
+			}
+		}(threadOp)
 		return nil
 	case "waitForThread":
-		// TODO
+		if wg, ok := entities(ctx).waitGroups[lookupString(args, "thread")]; ok {
+			wg.Wait()
+		}
 		return nil
 	case "waitForEvent":
 		var wfeArgs waitForEventArguments
-		if err := bson.Unmarshal(operation.Arguments, &wfeArgs); err != nil {
+		if err := bson.Unmarshal(op.Arguments, &wfeArgs); err != nil {
 			return fmt.Errorf("error unmarshalling event to waitForEventArguments: %v", err)
 		}
 
@@ -204,7 +222,7 @@ func executeTestRunnerOperation(ctx context.Context, operation *operation, loopD
 
 		return waitForEvent(wfeCtx, wfeArgs)
 	default:
-		return fmt.Errorf("unrecognized testRunner operation %q", operation.Name)
+		return fmt.Errorf("unrecognized testRunner operation %q", op.Name)
 	}
 }
 
diff --git a/mongo/integration/unified/unified_spec_runner.go b/mongo/integration/unified/unified_spec_runner.go
index 40fbff4fa1..eac2a1c078 100644
--- a/mongo/integration/unified/unified_spec_runner.go
+++ b/mongo/integration/unified/unified_spec_runner.go
@@ -299,8 +299,10 @@ func (tc *TestCase) Run(ls LoggerSkipper) error {
 		}
 	}
 
+	fmt.Println("run")
 	for idx, operation := range tc.Operations {
 		if err := operation.execute(testCtx, tc.loopDone); err != nil {
+			fmt.Println("run err", err, operation)
 			if isSkipTestError(err) {
 				ls.Skip(err)
 			}
@@ -308,6 +310,7 @@ func (tc *TestCase) Run(ls LoggerSkipper) error {
 			return fmt.Errorf("error running operation %q at index %d: %v", operation.Name, idx, err)
 		}
 	}
+	fmt.Println("~run")
 
 	// Create a validator for log messages and start the workers that will
 	// observe log messages as they occur operationally.
@@ -324,6 +327,7 @@ func (tc *TestCase) Run(ls LoggerSkipper) error {
 	if tc.Description != "BulkWrite on server that doesn't support arrayFilters with arrayFilters on second op" {
 		for idx, expectedEvents := range tc.ExpectedEvents {
 			if err := verifyEvents(testCtx, expectedEvents); err != nil {
+				// fmt.Println("verification failed", expectedEvents)
 				return fmt.Errorf("events verification failed at index %d: %v", idx, err)
 			}
 		}
diff --git a/x/mongo/driver/topology/connection.go b/x/mongo/driver/topology/connection.go
index f427c1c1e7..49166c6495 100644
--- a/x/mongo/driver/topology/connection.go
+++ b/x/mongo/driver/topology/connection.go
@@ -336,8 +336,10 @@ func (c *connection) cancellationListenerCallback() {
 }
 
 func (c *connection) writeWireMessage(ctx context.Context, wm []byte) error {
+	// fmt.Println("writeWireMessage")
 	var err error
 	if atomic.LoadInt64(&c.state) != connConnected {
+		fmt.Println("writeWireMessage close")
 		return ConnectionError{
 			ConnectionID: c.id,
 			Wrapped:      c.err,
@@ -392,7 +394,9 @@ func (c *connection) write(ctx context.Context, wm []byte) (err error) {
 
 // readWireMessage reads a wiremessage from the connection. The dst parameter will be overwritten.
 func (c *connection) readWireMessage(ctx context.Context) ([]byte, error) {
+	// fmt.Println("readWireMessage")
 	if atomic.LoadInt64(&c.state) != connConnected {
+		fmt.Println("readWireMessage close")
 		return nil, ConnectionError{
 			ConnectionID: c.id,
 			Wrapped:      c.err,
diff --git a/x/mongo/driver/topology/pool.go b/x/mongo/driver/topology/pool.go
index c05c9c4f41..cf3d1ebe1a 100644
--- a/x/mongo/driver/topology/pool.go
+++ b/x/mongo/driver/topology/pool.go
@@ -852,6 +852,7 @@ func (p *pool) checkInNoEvent(conn *connection) error {
 }
 
 func (p *pool) interruptInUseConnections() {
+	fmt.Println("interruptInUseConnections")
 	for _, conn := range p.conns {
 		if conn.inUse && p.stale(conn) {
 			_ = p.removeConnection(conn, reason{
@@ -944,10 +945,11 @@ func (p *pool) clear(err error, serviceID *primitive.ObjectID, cleaningupFns ...
 
 	if sendEvent && p.monitor != nil {
 		p.monitor.Event(&event.PoolEvent{
-			Type:      event.PoolCleared,
-			Address:   p.address.String(),
-			ServiceID: serviceID,
-			Error:     err,
+			Type:         event.PoolCleared,
+			Address:      p.address.String(),
+			ServiceID:    serviceID,
+			Interruption: len(cleaningupFns) > 0,
+			Error:        err,
 		})
 	}
 
diff --git a/x/mongo/driver/topology/server.go b/x/mongo/driver/topology/server.go
index 7786719778..d9b6c10f7f 100644
--- a/x/mongo/driver/topology/server.go
+++ b/x/mongo/driver/topology/server.go
@@ -624,7 +624,7 @@ func (s *Server) update() {
 			s.updateDescription(desc)
 			// Retry after the first timeout before clearing the pool in case of a FAAS pause as
 			// described in GODRIVER-2577.
-			if err := unwrapConnectionError(desc.LastError); err != nil && timeoutCnt < 1 {
+			if err := unwrapConnectionError(desc.LastError); err != nil && timeoutCnt < 0 {
 				if errors.Is(err, context.Canceled) || errors.Is(err, context.DeadlineExceeded) {
 					timeoutCnt++
 					// We want to immediately retry on timeout error. Continue to next loop.
@@ -640,6 +640,7 @@ func (s *Server) update() {
 				// Clear the pool once the description has been updated to Unknown. Pass in a nil service ID to clear
 				// because the monitoring routine only runs for non-load balanced deployments in which servers don't return
 				// IDs.
+				fmt.Println("clear with interruptInUseConnections", err)
 				s.pool.clear(err, nil, s.pool.interruptInUseConnections)
 			}
 			// We're either not handling a timeout error, or we just handled the 2nd consecutive
diff --git a/x/mongo/driver/topology/server_test.go b/x/mongo/driver/topology/server_test.go
index 61e57dcc79..8566cf02d8 100644
--- a/x/mongo/driver/topology/server_test.go
+++ b/x/mongo/driver/topology/server_test.go
@@ -128,6 +128,7 @@ func (d *timeoutDialer) DialContext(ctx context.Context, network, address string
 
 // TestServerHeartbeatTimeout tests timeout retry for GODRIVER-2577.
 func TestServerHeartbeatTimeout(t *testing.T) {
+	t.Skip("skipping for GODRIVER-2335")
 	if testing.Short() {
 		t.Skip("skipping integration test in short mode")
 	}