mirror of https://github.com/go-redis/redis.git
Avoid unnecessary retry delay following MOVED and ASK redirection (#3048)
This commit is contained in:
parent
0858ed24e6
commit
5756b05219
|
@ -938,10 +938,13 @@ func (c *ClusterClient) Process(ctx context.Context, cmd Cmder) error {
|
|||
func (c *ClusterClient) process(ctx context.Context, cmd Cmder) error {
|
||||
slot := c.cmdSlot(ctx, cmd)
|
||||
var node *clusterNode
|
||||
var moved bool
|
||||
var ask bool
|
||||
var lastErr error
|
||||
for attempt := 0; attempt <= c.opt.MaxRedirects; attempt++ {
|
||||
if attempt > 0 {
|
||||
// MOVED and ASK responses are not transient errors that require retry delay; they
|
||||
// should be attempted immediately.
|
||||
if attempt > 0 && !moved && !ask {
|
||||
if err := internal.Sleep(ctx, c.retryBackoff(attempt)); err != nil {
|
||||
return err
|
||||
}
|
||||
|
@ -985,7 +988,6 @@ func (c *ClusterClient) process(ctx context.Context, cmd Cmder) error {
|
|||
continue
|
||||
}
|
||||
|
||||
var moved bool
|
||||
var addr string
|
||||
moved, ask, addr = isMovedError(lastErr)
|
||||
if moved || ask {
|
||||
|
|
|
@ -653,6 +653,32 @@ var _ = Describe("ClusterClient", func() {
|
|||
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()
|
||||
opt.MinRetryBackoff = 10 * time.Minute
|
||||
opt.MaxRetryBackoff = 20 * time.Minute
|
||||
client := cluster.newClusterClient(ctx, opt)
|
||||
|
||||
Eventually(func() error {
|
||||
return client.SwapNodes(ctx, "A")
|
||||
}, 30*time.Second).ShouldNot(HaveOccurred())
|
||||
|
||||
// Note that this context sets a deadline more aggressive than the lowest possible bound
|
||||
// of the retry backoff; this verifies that redirection completes immediately.
|
||||
redirCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
|
||||
defer cancel()
|
||||
|
||||
err := client.Set(redirCtx, "A", "VALUE", 0).Err()
|
||||
Expect(err).NotTo(HaveOccurred())
|
||||
|
||||
v, err := client.Get(redirCtx, "A").Result()
|
||||
Expect(err).NotTo(HaveOccurred())
|
||||
Expect(v).To(Equal("VALUE"))
|
||||
|
||||
Expect(client.Close()).NotTo(HaveOccurred())
|
||||
})
|
||||
|
||||
It("calls fn for every master node", func() {
|
||||
for i := 0; i < 10; i++ {
|
||||
Expect(client.Set(ctx, strconv.Itoa(i), "", 0).Err()).NotTo(HaveOccurred())
|
||||
|
|
Loading…
Reference in New Issue