Merge cefa7c0daf into e63669e170

Bumps [rojopolis/spellcheck-github-actions](https://github.com/rojopolis/spellcheck-github-actions) from 0.40.0 to 0.45.0.
- [Release notes](https://github.com/rojopolis/spellcheck-github-actions/releases)
- [Changelog](https://github.com/rojopolis/spellcheck-github-actions/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rojopolis/spellcheck-github-actions/compare/0.40.0...0.45.0)

---
updated-dependencies:
- dependency-name: rojopolis/spellcheck-github-actions
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: ofekshenawa <104765379+ofekshenawa@users.noreply.github.com>

.github/workflows/spellcheck.yml

@@ -8,7 +8,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Check Spelling
-        uses: rojopolis/spellcheck-github-actions@0.40.0
+        uses: rojopolis/spellcheck-github-actions@0.45.0
         with:
           config_path: .github/spellcheck-settings.yml
           task_name: Markdown

command.go

@@ -167,6 +167,8 @@ func (cmd *baseCmd) stringArg(pos int) string {
 	switch v := arg.(type) {
 	case string:
 		return v
+	case []byte:
+		return string(v)
 	default:
 		// TODO: consider using appendArg
 		return fmt.Sprint(v)

internal/hscan/hscan.go

@@ -73,6 +73,9 @@ func Struct(dst interface{}) (StructValue, error) {
 
 // Scan scans the results from a key-value Redis map result set to a destination struct.
 // The Redis keys are matched to the struct's field with the `redis` tag.
+// This method will attempt to unmarshal each field and will return an error if any of the 
+// fields cannot be unmarshalled. The destination struct will have the failed fields set to
+// their zero value.
 func Scan(dst interface{}, keys []interface{}, vals []interface{}) error {
 	if len(keys) != len(vals) {
 		return errors.New("args should have the same number of keys and vals")
@@ -83,6 +86,8 @@ func Scan(dst interface{}, keys []interface{}, vals []interface{}) error {
 		return err
 	}
 
+	scanErrors := []error{}
+
 	// Iterate through the (key, value) sequence.
 	for i := 0; i < len(vals); i++ {
 		key, ok := keys[i].(string)
@@ -96,10 +101,14 @@ func Scan(dst interface{}, keys []interface{}, vals []interface{}) error {
 		}
 
 		if err := strct.Scan(key, val); err != nil {
-			return err
+			scanErrors = append(scanErrors, err)
 		}
 	}
 
+	if len(scanErrors) > 0 {
+		return fmt.Errorf("scan errors: %v", scanErrors)
+	}
+
 	return nil
 }
 

internal/hscan/hscan_test.go

@@ -196,6 +196,22 @@ var _ = Describe("Scan", func() {
 		Expect(Scan(&d, i{"bool"}, i{"123"})).To(HaveOccurred())
 	})
 
+	It("does not stop scanning on first failure", func() {
+		var d data
+
+		keys := i{"bool", "string", "int"}
+		vals := i{"-1", "foobar", "123"}
+
+		err := Scan(&d, keys, vals)
+		Expect(err).To(HaveOccurred())
+
+		Expect(d).To(Equal(data{
+			Bool:   false,
+			String: "foobar",
+			Int:    123,
+		}))
+  })
+
 	It("Implements Scanner", func() {
 		var td TimeData
 

osscluster.go

@@ -21,6 +21,10 @@ import (
 	"github.com/redis/go-redis/v9/internal/rand"
 )
 
+const (
+	minLatencyMeasurementInterval = 10 * time.Second
+)
+
 var errClusterNoNodes = fmt.Errorf("redis: cluster has no nodes")
 
 // ClusterOptions are used to configure a cluster client and should be
@@ -316,6 +320,10 @@ type clusterNode struct {
 	latency    uint32 // atomic
 	generation uint32 // atomic
 	failing    uint32 // atomic
+
+	// last time the latency measurement was performed for the node, stored in nanoseconds
+	// from epoch
+	lastLatencyMeasurement int64 // atomic
 }
 
 func newClusterNode(clOpt *ClusterOptions, addr string) *clusterNode {
@@ -368,6 +376,7 @@ func (n *clusterNode) updateLatency() {
 		latency = float64(dur) / float64(successes)
 	}
 	atomic.StoreUint32(&n.latency, uint32(latency+0.5))
+	n.SetLastLatencyMeasurement(time.Now())
 }
 
 func (n *clusterNode) Latency() time.Duration {
@@ -397,6 +406,10 @@ func (n *clusterNode) Generation() uint32 {
 	return atomic.LoadUint32(&n.generation)
 }
 
+func (n *clusterNode) LastLatencyMeasurement() int64 {
+	return atomic.LoadInt64(&n.lastLatencyMeasurement)
+}
+
 func (n *clusterNode) SetGeneration(gen uint32) {
 	for {
 		v := atomic.LoadUint32(&n.generation)
@@ -406,6 +419,15 @@ func (n *clusterNode) SetGeneration(gen uint32) {
 	}
 }
 
+func (n *clusterNode) SetLastLatencyMeasurement(t time.Time) {
+	for {
+		v := atomic.LoadInt64(&n.lastLatencyMeasurement)
+		if t.UnixNano() < v || atomic.CompareAndSwapInt64(&n.lastLatencyMeasurement, v, t.UnixNano()) {
+			break
+		}
+	}
+}
+
 //------------------------------------------------------------------------------
 
 type clusterNodes struct {
@@ -493,10 +515,11 @@ func (c *clusterNodes) GC(generation uint32) {
 	c.mu.Lock()
 
 	c.activeAddrs = c.activeAddrs[:0]
+	now := time.Now()
 	for addr, node := range c.nodes {
 		if node.Generation() >= generation {
 			c.activeAddrs = append(c.activeAddrs, addr)
-			if c.opt.RouteByLatency {
+			if c.opt.RouteByLatency && node.LastLatencyMeasurement() < now.Add(-minLatencyMeasurementInterval).UnixNano() {
 				go node.updateLatency()
 			}
 			continue

osscluster_test.go

@@ -653,6 +653,32 @@ var _ = Describe("ClusterClient", func() {
 			Expect(client.Close()).NotTo(HaveOccurred())
 		})
 
+		It("determines hash slots correctly for generic commands", func() {
+			opt := redisClusterOptions()
+			opt.MaxRedirects = -1
+			client := cluster.newClusterClient(ctx, opt)
+
+			err := client.Do(ctx, "GET", "A").Err()
+			Expect(err).To(Equal(redis.Nil))
+
+			err = client.Do(ctx, []byte("GET"), []byte("A")).Err()
+			Expect(err).To(Equal(redis.Nil))
+
+			Eventually(func() error {
+				return client.SwapNodes(ctx, "A")
+			}, 30*time.Second).ShouldNot(HaveOccurred())
+
+			err = client.Do(ctx, "GET", "A").Err()
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("MOVED"))
+
+			err = client.Do(ctx, []byte("GET"), []byte("A")).Err()
+			Expect(err).To(HaveOccurred())
+			Expect(err.Error()).To(ContainSubstring("MOVED"))
+
+			Expect(client.Close()).NotTo(HaveOccurred())
+		})
+
 		It("follows node redirection immediately", func() {
 			// Configure retry backoffs far in excess of the expected duration of redirection
 			opt := redisClusterOptions()

redis.go

@@ -176,8 +176,6 @@ func (hs *hooksMixin) withProcessPipelineHook(
 }
 
 func (hs *hooksMixin) dialHook(ctx context.Context, network, addr string) (net.Conn, error) {
-	hs.hooksMu.Lock()
-	defer hs.hooksMu.Unlock()
 	return hs.current.dial(ctx, network, addr)
 }
 

redis_test.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"net"
+	"sync"
 	"testing"
 	"time"
 
@@ -633,3 +634,67 @@ var _ = Describe("Hook with MinIdleConns", func() {
 		}))
 	})
 })
+
+var _ = Describe("Dialer connection timeouts", func() {
+	var client *redis.Client
+
+	const dialSimulatedDelay = 1 * time.Second
+
+	BeforeEach(func() {
+		options := redisOptions()
+		options.Dialer = func(ctx context.Context, network, addr string) (net.Conn, error) {
+			// Simulated slow dialer.
+			// Note that the following sleep is deliberately not context-aware.
+			time.Sleep(dialSimulatedDelay)
+			return net.Dial("tcp", options.Addr)
+		}
+		options.MinIdleConns = 1
+		client = redis.NewClient(options)
+	})
+
+	AfterEach(func() {
+		err := client.Close()
+		Expect(err).NotTo(HaveOccurred())
+	})
+
+	It("does not contend on connection dial for concurrent commands", func() {
+		var wg sync.WaitGroup
+
+		const concurrency = 10
+
+		durations := make(chan time.Duration, concurrency)
+		errs := make(chan error, concurrency)
+
+		start := time.Now()
+		wg.Add(concurrency)
+
+		for i := 0; i < concurrency; i++ {
+			go func() {
+				defer wg.Done()
+
+				start := time.Now()
+				err := client.Ping(ctx).Err()
+				durations <- time.Since(start)
+				errs <- err
+			}()
+		}
+
+		wg.Wait()
+		close(durations)
+		close(errs)
+
+		// All commands should eventually succeed, after acquiring a connection.
+		for err := range errs {
+			Expect(err).NotTo(HaveOccurred())
+		}
+
+		// Each individual command should complete within the simulated dial duration bound.
+		for duration := range durations {
+			Expect(duration).To(BeNumerically("<", 2*dialSimulatedDelay))
+		}
+
+		// Due to concurrent execution, the entire test suite should also complete within
+		// the same dial duration bound applied for individual commands.
+		Expect(time.Since(start)).To(BeNumerically("<", 2*dialSimulatedDelay))
+	})
+})