mirror
/
redis
mirror of https://github.com/go-redis/redis.git
1
0
Fork 1
Code Issues Packages Projects Releases Wiki Activity

Rework pipeline retrying

This commit is contained in:
Vladimir Mihailenco 2017-08-31 15:22:47 +03:00
parent 0daeac9c3e
commit dbd2c99ba9
13 changed files with 388 additions and 256 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

325
cluster.go
View File

@ -14,8 +14,8 @@ import (
"github.com/go-redis/redis/internal/proto"
)
var errClusterNoNodes = internal.RedisError("redis: cluster has no nodes")
var errNilClusterState = internal.RedisError("redis: cannot load cluster slots")
var errClusterNoNodes = fmt.Errorf("redis: cluster has no nodes")
var errNilClusterState = fmt.Errorf("redis: cannot load cluster slots")
// ClusterOptions are used to configure a cluster client and should be
// passed to NewClusterClient.
@ -64,6 +64,19 @@ func (opt *ClusterOptions) init() {
opt.ReadOnly = true
}
switch opt.ReadTimeout {
case -1:
opt.ReadTimeout = 0
case 0:
opt.ReadTimeout = 3 * time.Second
}
switch opt.WriteTimeout {
case -1:
opt.WriteTimeout = 0
case 0:
opt.WriteTimeout = opt.ReadTimeout
}
switch opt.MinRetryBackoff {
case -1:
opt.MinRetryBackoff = 0
@ -192,6 +205,19 @@ func (c *clusterNodes) Close() error {
return firstErr
}
func (c *clusterNodes) Err() error {
c.mu.RLock()
defer c.mu.RUnlock()
if c.closed {
return pool.ErrClosed
}
if len(c.addrs) == 0 {
return errClusterNoNodes
}
return nil
}
func (c *clusterNodes) NextGeneration() uint32 {
c.generation++
return c.generation
@ -468,13 +494,22 @@ func (c *ClusterClient) Options() *ClusterOptions {
return c.opt
}
func (c *ClusterClient) state() *clusterState {
func (c *ClusterClient) retryBackoff(attempt int) time.Duration {
return internal.RetryBackoff(attempt, c.opt.MinRetryBackoff, c.opt.MaxRetryBackoff)
}
func (c *ClusterClient) state() (*clusterState, error) {
v := c._state.Load()
if v != nil {
return v.(*clusterState)
return v.(*clusterState), nil
}
if err := c.nodes.Err(); err != nil {
return nil, err
}
c.lazyReloadState()
return nil
return nil, errNilClusterState
}
func (c *ClusterClient) cmdInfo(name string) *CommandInfo {
@ -495,15 +530,20 @@ func (c *ClusterClient) cmdInfo(name string) *CommandInfo {
if err != nil {
return nil
}
return c.cmdsInfo[name]
info := c.cmdsInfo[name]
if info == nil {
internal.Logf("info for cmd=%s not found", name)
}
return info
}
func (c *ClusterClient) cmdSlot(cmd Cmder) int {
cmdInfo := c.cmdInfo(cmd.Name())
firstKey := cmd.arg(cmdFirstKeyPos(cmd, cmdInfo))
return hashtag.Slot(firstKey)
}
func (c *ClusterClient) cmdSlotAndNode(state *clusterState, cmd Cmder) (int, *clusterNode, error) {
if state == nil {
node, err := c.nodes.Random()
return 0, node, err
}
cmdInfo := c.cmdInfo(cmd.Name())
firstKey := cmd.arg(cmdFirstKeyPos(cmd, cmdInfo))
slot := hashtag.Slot(firstKey)
@ -523,19 +563,51 @@ func (c *ClusterClient) cmdSlotAndNode(state *clusterState, cmd Cmder) (int, *cl
}
func (c *ClusterClient) Watch(fn func(*Tx) error, keys ...string) error {
state := c.state()
var node *clusterNode
var err error
if state != nil && len(keys) > 0 {
node, err = state.slotMasterNode(hashtag.Slot(keys[0]))
} else {
node, err = c.nodes.Random()
if len(keys) == 0 {
return fmt.Errorf("redis: keys don't hash to the same slot")
}
state, err := c.state()
if err != nil {
return err
}
return node.Client.Watch(fn, keys...)
slot := hashtag.Slot(keys[0])
for _, key := range keys[1:] {
if hashtag.Slot(key) != slot {
return fmt.Errorf("redis: Watch requires all keys to be in the same slot")
}
}
node, err := state.slotMasterNode(slot)
if err != nil {
return err
}
for attempt := 0; attempt <= c.opt.MaxRedirects; attempt++ {
if attempt > 0 {
time.Sleep(c.retryBackoff(attempt))
}
err = node.Client.Watch(fn, keys...)
if err == nil {
break
}
moved, ask, addr := internal.IsMovedError(err)
if moved || ask {
c.lazyReloadState()
node, err = c.nodes.GetOrCreate(addr)
if err != nil {
return err
}
continue
}
return err
}
return err
}
// Close closes the cluster client, releasing any open resources.
@ -547,7 +619,13 @@ func (c *ClusterClient) Close() error {
}
func (c *ClusterClient) Process(cmd Cmder) error {
slot, node, err := c.cmdSlotAndNode(c.state(), cmd)
state, err := c.state()
if err != nil {
cmd.setErr(err)
return err
}
_, node, err := c.cmdSlotAndNode(state, cmd)
if err != nil {
cmd.setErr(err)
return err
@ -556,7 +634,7 @@ func (c *ClusterClient) Process(cmd Cmder) error {
var ask bool
for attempt := 0; attempt <= c.opt.MaxRedirects; attempt++ {
if attempt > 0 {
time.Sleep(node.Client.retryBackoff(attempt))
time.Sleep(c.retryBackoff(attempt))
}
if ask {
@ -572,7 +650,7 @@ func (c *ClusterClient) Process(cmd Cmder) error {
// If there is no error - we are done.
if err == nil {
return nil
break
}
// If slave is loading - read from master.
@ -582,12 +660,11 @@ func (c *ClusterClient) Process(cmd Cmder) error {
continue
}
// On network errors try random node.
if internal.IsRetryableError(err) || internal.IsClusterDownError(err) {
node, err = c.nodes.Random()
if err != nil {
cmd.setErr(err)
return err
if internal.IsRetryableError(err) {
var nodeErr error
node, nodeErr = c.nodes.Random()
if nodeErr != nil {
break
}
continue
}
@ -596,20 +673,13 @@ func (c *ClusterClient) Process(cmd Cmder) error {
var addr string
moved, ask, addr = internal.IsMovedError(err)
if moved || ask {
state := c.state()
if state != nil && slot >= 0 {
master, _ := state.slotMasterNode(slot)
if moved && (master == nil || master.Client.getAddr() != addr) {
c.lazyReloadState()
}
}
node, err = c.nodes.GetOrCreate(addr)
if err != nil {
cmd.setErr(err)
return err
var nodeErr error
node, nodeErr = c.nodes.GetOrCreate(addr)
if nodeErr != nil {
break
}
continue
}
@ -622,9 +692,9 @@ func (c *ClusterClient) Process(cmd Cmder) error {
// ForEachMaster concurrently calls the fn on each master node in the cluster.
// It returns the first error if any.
func (c *ClusterClient) ForEachMaster(fn func(client *Client) error) error {
state := c.state()
if state == nil {
return errNilClusterState
state, err := c.state()
if err != nil {
return err
}
var wg sync.WaitGroup
@ -655,9 +725,9 @@ func (c *ClusterClient) ForEachMaster(fn func(client *Client) error) error {
// ForEachSlave concurrently calls the fn on each slave node in the cluster.
// It returns the first error if any.
func (c *ClusterClient) ForEachSlave(fn func(client *Client) error) error {
state := c.state()
if state == nil {
return errNilClusterState
state, err := c.state()
if err != nil {
return err
}
var wg sync.WaitGroup
@ -688,9 +758,9 @@ func (c *ClusterClient) ForEachSlave(fn func(client *Client) error) error {
// ForEachNode concurrently calls the fn on each known node in the cluster.
// It returns the first error if any.
func (c *ClusterClient) ForEachNode(fn func(client *Client) error) error {
state := c.state()
if state == nil {
return errNilClusterState
state, err := c.state()
if err != nil {
return err
}
var wg sync.WaitGroup
@ -728,7 +798,7 @@ func (c *ClusterClient) ForEachNode(fn func(client *Client) error) error {
func (c *ClusterClient) PoolStats() *PoolStats {
var acc PoolStats
state := c.state()
state, _ := c.state()
if state == nil {
return &acc
}
@ -762,10 +832,8 @@ func (c *ClusterClient) lazyReloadState() {
go func() {
defer atomic.StoreUint32(&c.reloading, 0)
var state *clusterState
for {
var err error
state, err = c.reloadState()
state, err := c.reloadState()
if err == pool.ErrClosed {
return
}
@ -776,11 +844,10 @@ func (c *ClusterClient) lazyReloadState() {
}
c._state.Store(state)
time.Sleep(5 * time.Second)
c.nodes.GC(state.generation)
break
}
time.Sleep(3 * time.Second)
c.nodes.GC(state.generation)
}()
}
@ -843,10 +910,15 @@ func (c *ClusterClient) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
func (c *ClusterClient) pipelineExec(cmds []Cmder) error {
cmdsMap, err := c.mapCmdsByNode(cmds)
if err != nil {
setCmdsErr(cmds, err)
return err
}
for i := 0; i <= c.opt.MaxRedirects; i++ {
for attempt := 0; attempt <= c.opt.MaxRedirects; attempt++ {
if attempt > 0 {
time.Sleep(c.retryBackoff(attempt))
}
failedCmds := make(map[*clusterNode][]Cmder)
for node, cmds := range cmdsMap {
@ -856,8 +928,12 @@ func (c *ClusterClient) pipelineExec(cmds []Cmder) error {
continue
}
err = c.pipelineProcessCmds(cn, cmds, failedCmds)
node.Client.releaseConn(cn, err)
err = c.pipelineProcessCmds(node, cn, cmds, failedCmds)
if err == nil || internal.IsRedisError(err) {
_ = node.Client.connPool.Put(cn)
} else {
_ = node.Client.connPool.Remove(cn)
}
}
if len(failedCmds) == 0 {
@ -866,21 +942,20 @@ func (c *ClusterClient) pipelineExec(cmds []Cmder) error {
cmdsMap = failedCmds
}
var firstErr error
for _, cmd := range cmds {
if err := cmd.Err(); err != nil {
firstErr = err
break
}
}
return firstErr
return firstCmdsErr(cmds)
}
func (c *ClusterClient) mapCmdsByNode(cmds []Cmder) (map[*clusterNode][]Cmder, error) {
state := c.state()
state, err := c.state()
if err != nil {
setCmdsErr(cmds, err)
return nil, err
}
cmdsMap := make(map[*clusterNode][]Cmder)
for _, cmd := range cmds {
_, node, err := c.cmdSlotAndNode(state, cmd)
slot := c.cmdSlot(cmd)
node, err := state.slotMasterNode(slot)
if err != nil {
return nil, err
}
@ -890,11 +965,12 @@ func (c *ClusterClient) mapCmdsByNode(cmds []Cmder) (map[*clusterNode][]Cmder, e
}
func (c *ClusterClient) pipelineProcessCmds(
cn *pool.Conn, cmds []Cmder, failedCmds map[*clusterNode][]Cmder,
node *clusterNode, cn *pool.Conn, cmds []Cmder, failedCmds map[*clusterNode][]Cmder,
) error {
cn.SetWriteTimeout(c.opt.WriteTimeout)
if err := writeCmd(cn, cmds...); err != nil {
setCmdsErr(cmds, err)
failedCmds[node] = cmds
return err
}
@ -907,46 +983,53 @@ func (c *ClusterClient) pipelineProcessCmds(
func (c *ClusterClient) pipelineReadCmds(
cn *pool.Conn, cmds []Cmder, failedCmds map[*clusterNode][]Cmder,
) error {
var firstErr error
for _, cmd := range cmds {
err := cmd.readReply(cn)
if err == nil {
continue
}
if firstErr == nil {
firstErr = err
if c.checkMovedErr(cmd, err, failedCmds) {
continue
}
err = c.checkMovedErr(cmd, failedCmds)
if err != nil && firstErr == nil {
firstErr = err
if internal.IsRedisError(err) {
continue
}
return err
}
return firstErr
return nil
}
func (c *ClusterClient) checkMovedErr(cmd Cmder, failedCmds map[*clusterNode][]Cmder) error {
moved, ask, addr := internal.IsMovedError(cmd.Err())
func (c *ClusterClient) checkMovedErr(
cmd Cmder, err error, failedCmds map[*clusterNode][]Cmder,
) bool {
moved, ask, addr := internal.IsMovedError(err)
if moved {
c.lazyReloadState()
node, err := c.nodes.GetOrCreate(addr)
if err != nil {
return err
return false
}
failedCmds[node] = append(failedCmds[node], cmd)
return true
}
if ask {
node, err := c.nodes.GetOrCreate(addr)
if err != nil {
return err
return false
}
failedCmds[node] = append(failedCmds[node], NewCmd("ASKING"), cmd)
return true
}
return nil
return false
}
// TxPipeline acts like Pipeline, but wraps queued commands with MULTI/EXEC.
@ -963,25 +1046,25 @@ func (c *ClusterClient) TxPipelined(fn func(Pipeliner) error) ([]Cmder, error) {
}
func (c *ClusterClient) txPipelineExec(cmds []Cmder) error {
cmdsMap, err := c.mapCmdsBySlot(cmds)
state, err := c.state()
if err != nil {
return err
}
state := c.state()
if state == nil {
return errNilClusterState
}
cmdsMap := c.mapCmdsBySlot(cmds)
for slot, cmds := range cmdsMap {
node, err := state.slotMasterNode(slot)
if err != nil {
setCmdsErr(cmds, err)
continue
}
cmdsMap := map[*clusterNode][]Cmder{node: cmds}
for i := 0; i <= c.opt.MaxRedirects; i++ {
for attempt := 0; attempt <= c.opt.MaxRedirects; attempt++ {
if attempt > 0 {
time.Sleep(c.retryBackoff(attempt))
}
failedCmds := make(map[*clusterNode][]Cmder)
for node, cmds := range cmdsMap {
@ -992,7 +1075,11 @@ func (c *ClusterClient) txPipelineExec(cmds []Cmder) error {
}
err = c.txPipelineProcessCmds(node, cn, cmds, failedCmds)
node.Client.releaseConn(cn, err)
if err == nil || internal.IsRedisError(err) {
_ = node.Client.connPool.Put(cn)
} else {
_ = node.Client.connPool.Remove(cn)
}
}
if len(failedCmds) == 0 {
@ -1002,27 +1089,16 @@ func (c *ClusterClient) txPipelineExec(cmds []Cmder) error {
}
}
var firstErr error
for _, cmd := range cmds {
if err := cmd.Err(); err != nil {
firstErr = err
break
}
}
return firstErr
return firstCmdsErr(cmds)
}
func (c *ClusterClient) mapCmdsBySlot(cmds []Cmder) (map[int][]Cmder, error) {
state := c.state()
func (c *ClusterClient) mapCmdsBySlot(cmds []Cmder) map[int][]Cmder {
cmdsMap := make(map[int][]Cmder)
for _, cmd := range cmds {
slot, _, err := c.cmdSlotAndNode(state, cmd)
if err != nil {
return nil, err
}
slot := c.cmdSlot(cmd)
cmdsMap[slot] = append(cmdsMap[slot], cmd)
}
return cmdsMap, nil
return cmdsMap
}
func (c *ClusterClient) txPipelineProcessCmds(
@ -1039,22 +1115,20 @@ func (c *ClusterClient) txPipelineProcessCmds(
cn.SetReadTimeout(c.opt.ReadTimeout)
if err := c.txPipelineReadQueued(cn, cmds, failedCmds); err != nil {
setCmdsErr(cmds, err)
return err
}
_, err := pipelineReadCmds(cn, cmds)
return err
return pipelineReadCmds(cn, cmds)
}
func (c *ClusterClient) txPipelineReadQueued(
cn *pool.Conn, cmds []Cmder, failedCmds map[*clusterNode][]Cmder,
) error {
var firstErr error
// Parse queued replies.
var statusCmd StatusCmd
if err := statusCmd.readReply(cn); err != nil && firstErr == nil {
firstErr = err
if err := statusCmd.readReply(cn); err != nil {
return err
}
for _, cmd := range cmds {
@ -1063,15 +1137,11 @@ func (c *ClusterClient) txPipelineReadQueued(
continue
}
cmd.setErr(err)
if firstErr == nil {
firstErr = err
if c.checkMovedErr(cmd, err, failedCmds) || internal.IsRedisError(err) {
continue
}
err = c.checkMovedErr(cmd, failedCmds)
if err != nil && firstErr == nil {
firstErr = err
}
return err
}
// Parse number of replies.
@ -1085,7 +1155,13 @@ func (c *ClusterClient) txPipelineReadQueued(
switch line[0] {
case proto.ErrorReply:
return proto.ParseErrorReply(line)
err := proto.ParseErrorReply(line)
for _, cmd := range cmds {
if !c.checkMovedErr(cmd, err, failedCmds) {
break
}
}
return err
case proto.ArrayReply:
// ok
default:
@ -1093,7 +1169,7 @@ func (c *ClusterClient) txPipelineReadQueued(
return err
}
return firstErr
return nil
}
func (c *ClusterClient) pubSub(channels []string) *PubSub {
@ -1112,7 +1188,12 @@ func (c *ClusterClient) pubSub(channels []string) *PubSub {
slot = -1
}
masterNode, err := c.state().slotMasterNode(slot)
state, err := c.state()
if err != nil {
return nil, err
}
masterNode, err := state.slotMasterNode(slot)
if err != nil {
return nil, err
}

69
cluster_test.go
View File

@ -200,7 +200,7 @@ var _ = Describe("ClusterClient", func() {
Eventually(func() string {
return client.Get("A").Val()
}).Should(Equal("VALUE"))
}, 30*time.Second).Should(Equal("VALUE"))
cnt, err := client.Del("A").Result()
Expect(err).NotTo(HaveOccurred())
@ -215,7 +215,7 @@ var _ = Describe("ClusterClient", func() {
Eventually(func() string {
return client.Get("A").Val()
}).Should(Equal("VALUE"))
}, 30*time.Second).Should(Equal("VALUE"))
})
It("distributes keys", func() {
@ -227,7 +227,7 @@ var _ = Describe("ClusterClient", func() {
for _, master := range cluster.masters() {
Eventually(func() string {
return master.Info("keyspace").Val()
}, 5*time.Second).Should(Or(
}, 30*time.Second).Should(Or(
ContainSubstring("keys=31"),
ContainSubstring("keys=29"),
ContainSubstring("keys=40"),
@ -251,7 +251,7 @@ var _ = Describe("ClusterClient", func() {
for _, master := range cluster.masters() {
Eventually(func() string {
return master.Info("keyspace").Val()
}, 5*time.Second).Should(Or(
}, 30*time.Second).Should(Or(
ContainSubstring("keys=31"),
ContainSubstring("keys=29"),
ContainSubstring("keys=40"),
@ -320,10 +320,6 @@ var _ = Describe("ClusterClient", func() {
Expect(err).NotTo(HaveOccurred())
Expect(cmds).To(HaveLen(14))
if opt.RouteByLatency {
return
}
for _, key := range keys {
slot := hashtag.Slot(key)
client.SwapSlotNodes(slot)
@ -432,6 +428,9 @@ var _ = Describe("ClusterClient", func() {
})
AfterEach(func() {
_ = client.ForEachMaster(func(master *redis.Client) error {
return master.FlushDB().Err()
})
Expect(client.Close()).NotTo(HaveOccurred())
})
@ -560,6 +559,9 @@ var _ = Describe("ClusterClient", func() {
})
AfterEach(func() {
_ = client.ForEachMaster(func(master *redis.Client) error {
return master.FlushDB().Err()
})
Expect(client.Close()).NotTo(HaveOccurred())
})
@ -575,10 +577,19 @@ var _ = Describe("ClusterClient", func() {
_ = client.ForEachMaster(func(master *redis.Client) error {
return master.FlushDB().Err()
})
_ = client.ForEachSlave(func(slave *redis.Client) error {
Eventually(func() int64 {
return client.DBSize().Val()
}, 30*time.Second).Should(Equal(int64(0)))
return nil
})
})
AfterEach(func() {
client.FlushDB()
_ = client.ForEachMaster(func(master *redis.Client) error {
return master.FlushDB().Err()
})
Expect(client.Close()).NotTo(HaveOccurred())
})
@ -597,7 +608,7 @@ var _ = Describe("ClusterClient without nodes", func() {
Expect(client.Close()).NotTo(HaveOccurred())
})
It("returns an error", func() {
It("Ping returns an error", func() {
err := client.Ping().Err()
Expect(err).To(MatchError("redis: cluster has no nodes"))
})
@ -626,7 +637,7 @@ var _ = Describe("ClusterClient without valid nodes", func() {
It("returns an error", func() {
err := client.Ping().Err()
Expect(err).To(MatchError("ERR This instance has cluster support disabled"))
Expect(err).To(MatchError("redis: cannot load cluster slots"))
})
It("pipeline returns an error", func() {
@ -634,7 +645,7 @@ var _ = Describe("ClusterClient without valid nodes", func() {
pipe.Ping()
return nil
})
Expect(err).To(MatchError("ERR This instance has cluster support disabled"))
Expect(err).To(MatchError("redis: cannot load cluster slots"))
})
})
@ -664,7 +675,7 @@ var _ = Describe("ClusterClient timeout", func() {
It("Tx timeouts", func() {
err := client.Watch(func(tx *redis.Tx) error {
return tx.Ping().Err()
})
}, "foo")
Expect(err).To(HaveOccurred())
Expect(err.(net.Error).Timeout()).To(BeTrue())
})
@ -676,42 +687,20 @@ var _ = Describe("ClusterClient timeout", func() {
return nil
})
return err
})
}, "foo")
Expect(err).To(HaveOccurred())
Expect(err.(net.Error).Timeout()).To(BeTrue())
})
}
Context("read timeout", func() {
BeforeEach(func() {
opt := redisClusterOptions()
opt.ReadTimeout = time.Nanosecond
opt.WriteTimeout = -1
client = cluster.clusterClient(opt)
})
testTimeout()
})
Context("write timeout", func() {
BeforeEach(func() {
opt := redisClusterOptions()
opt.ReadTimeout = time.Nanosecond
opt.WriteTimeout = -1
client = cluster.clusterClient(opt)
})
testTimeout()
})
Context("ClientPause timeout", func() {
const pause = time.Second
Context("read/write timeout", func() {
BeforeEach(func() {
opt := redisClusterOptions()
opt.ReadTimeout = pause / 10
opt.WriteTimeout = pause / 10
opt.MaxRedirects = -1
opt.ReadTimeout = 100 * time.Millisecond
opt.WriteTimeout = 100 * time.Millisecond
opt.MaxRedirects = 1
client = cluster.clusterClient(opt)
err := client.ForEachNode(func(client *redis.Client) error {

12
command.go
View File

@ -46,8 +46,19 @@ type Cmder interface {
func setCmdsErr(cmds []Cmder, e error) {
for _, cmd := range cmds {
if cmd.Err() == nil {
cmd.setErr(e)
}
}
}
func firstCmdsErr(cmds []Cmder) error {
for _, cmd := range cmds {
if err := cmd.Err(); err != nil {
return err
}
}
return nil
}
func writeCmd(cn *pool.Conn, cmds ...Cmder) error {
@ -95,7 +106,6 @@ func cmdFirstKeyPos(cmd Cmder, info *CommandInfo) int {
return 1
}
if info == nil {
internal.Logf("info for cmd=%s not found", cmd.Name())
return -1
}
return int(info.FirstKeyPos)

53
commands_test.go
View File

@ -27,11 +27,21 @@ var _ = Describe("Commands", func() {
Describe("server", func() {
It("should Auth", func() {
_, err := client.Pipelined(func(pipe redis.Pipeliner) error {
cmds, err := client.Pipelined(func(pipe redis.Pipeliner) error {
pipe.Auth("password")
pipe.Auth("")
return nil
})
Expect(err).To(MatchError("ERR Client sent AUTH, but no password is set"))
Expect(cmds[0].Err()).To(MatchError("ERR Client sent AUTH, but no password is set"))
Expect(cmds[1].Err()).To(MatchError("ERR Client sent AUTH, but no password is set"))
stats := client.Pool().Stats()
Expect(stats.Requests).To(Equal(uint32(2)))
Expect(stats.Hits).To(Equal(uint32(1)))
Expect(stats.Timeouts).To(Equal(uint32(0)))
Expect(stats.TotalConns).To(Equal(uint32(1)))
Expect(stats.FreeConns).To(Equal(uint32(1)))
})
It("should Echo", func() {
@ -187,6 +197,29 @@ var _ = Describe("Commands", func() {
Expect(tm).To(BeTemporally("~", time.Now(), 3*time.Second))
})
It("Should Command", func() {
cmds, err := client.Command().Result()
Expect(err).NotTo(HaveOccurred())
Expect(len(cmds)).To(BeNumerically("~", 180, 10))
cmd := cmds["mget"]
Expect(cmd.Name).To(Equal("mget"))
Expect(cmd.Arity).To(Equal(int8(-2)))
Expect(cmd.Flags).To(ContainElement("readonly"))
Expect(cmd.FirstKeyPos).To(Equal(int8(1)))
Expect(cmd.LastKeyPos).To(Equal(int8(-1)))
Expect(cmd.StepCount).To(Equal(int8(1)))
cmd = cmds["ping"]
Expect(cmd.Name).To(Equal("ping"))
Expect(cmd.Arity).To(Equal(int8(-1)))
Expect(cmd.Flags).To(ContainElement("stale"))
Expect(cmd.Flags).To(ContainElement("fast"))
Expect(cmd.FirstKeyPos).To(Equal(int8(0)))
Expect(cmd.LastKeyPos).To(Equal(int8(0)))
Expect(cmd.StepCount).To(Equal(int8(0)))
})
})
Describe("debugging", func() {
@ -2887,24 +2920,6 @@ var _ = Describe("Commands", func() {
})
Describe("Command", func() {
It("returns map of commands", func() {
cmds, err := client.Command().Result()
Expect(err).NotTo(HaveOccurred())
Expect(len(cmds)).To(BeNumerically("~", 180, 10))
cmd := cmds["mget"]
Expect(cmd.Name).To(Equal("mget"))
Expect(cmd.Arity).To(Equal(int8(-2)))
Expect(cmd.Flags).To(ContainElement("readonly"))
Expect(cmd.FirstKeyPos).To(Equal(int8(1)))
Expect(cmd.LastKeyPos).To(Equal(int8(-1)))
Expect(cmd.StepCount).To(Equal(int8(1)))
})
})
Describe("Eval", func() {
It("returns keys and values", func() {

14
export_test.go
View File

@ -20,8 +20,13 @@ func (c *PubSub) ReceiveMessageTimeout(timeout time.Duration) (*Message, error)
}
func (c *ClusterClient) SlotAddrs(slot int) []string {
state, err := c.state()
if err != nil {
panic(err)
}
var addrs []string
for _, n := range c.state().slotNodes(slot) {
for _, n := range state.slotNodes(slot) {
addrs = append(addrs, n.Client.getAddr())
}
return addrs
@ -29,7 +34,12 @@ func (c *ClusterClient) SlotAddrs(slot int) []string {
// SwapSlot swaps a slot's master/slave address for testing MOVED redirects.
func (c *ClusterClient) SwapSlotNodes(slot int) {
nodes := c.state().slots[slot]
state, err := c.state()
if err != nil {
panic(err)
}
nodes := state.slots[slot]
if len(nodes) == 2 {
nodes[0], nodes[1] = nodes[1], nodes[0]
}

25
internal/error.go
View File

@ -13,10 +13,23 @@ type RedisError string
func (e RedisError) Error() string { return string(e) }
func IsRetryableError(err error) bool {
return IsNetworkError(err) || err.Error() == "ERR max number of clients reached"
if IsNetworkError(err) {
return true
}
s := err.Error()
if s == "ERR max number of clients reached" {
return true
}
if strings.HasPrefix(s, "LOADING ") {
return true
}
if strings.HasPrefix(s, "CLUSTERDOWN ") {
return true
}
return false
}
func IsInternalError(err error) bool {
func IsRedisError(err error) bool {
_, ok := err.(RedisError)
return ok
}
@ -33,7 +46,7 @@ func IsBadConn(err error, allowTimeout bool) bool {
if err == nil {
return false
}
if IsInternalError(err) {
if IsRedisError(err) {
return false
}
if allowTimeout {
@ -45,7 +58,7 @@ func IsBadConn(err error, allowTimeout bool) bool {
}
func IsMovedError(err error) (moved bool, ask bool, addr string) {
if !IsInternalError(err) {
if !IsRedisError(err) {
return
}
@ -69,7 +82,3 @@ func IsMovedError(err error) (moved bool, ask bool, addr string) {
func IsLoadingError(err error) bool {
return strings.HasPrefix(err.Error(), "LOADING ")
}
func IsClusterDownError(err error) bool {
return strings.HasPrefix(err.Error(), "CLUSTERDOWN ")
}

2
internal/proto/reader.go
View File

@ -63,7 +63,7 @@ func (p *Reader) ReadLine() ([]byte, error) {
return nil, bufio.ErrBufferFull
}
if len(line) == 0 {
return nil, internal.RedisError("redis: reply is empty")
return nil, fmt.Errorf("redis: reply is empty")
}
if isNilReply(line) {
return nil, internal.Nil

2
internal/proto/scan.go
View File

@ -11,7 +11,7 @@ import (
func Scan(b []byte, v interface{}) error {
switch v := v.(type) {
case nil:
return internal.RedisError("redis: Scan(nil)")
return fmt.Errorf("redis: Scan(nil)")
case *string:
*v = internal.BytesToString(b)
return nil

3
main_test.go
View File

@ -3,6 +3,7 @@ package redis_test
import (
"errors"
"fmt"
"log"
"net"
"os"
"os/exec"
@ -51,7 +52,7 @@ var cluster = &clusterScenario{
}
func init() {
//redis.SetLogger(log.New(os.Stderr, "redis: ", log.LstdFlags|log.Lshortfile))
redis.SetLogger(log.New(os.Stderr, "redis: ", log.LstdFlags|log.Lshortfile))
}
var _ = BeforeSuite(func() {

5
pubsub.go
View File

@ -95,7 +95,10 @@ func (c *PubSub) releaseConn(cn *pool.Conn, err error) {
}
func (c *PubSub) _releaseConn(cn *pool.Conn, err error) {
if internal.IsBadConn(err, true) && c.cn == cn {
if c.cn != cn {
return
}
if internal.IsBadConn(err, true) {
_ = c.closeTheCn()
}
}

58
redis.go
View File

@ -197,8 +197,11 @@ type pipelineProcessor func(*pool.Conn, []Cmder) (bool, error)
func (c *baseClient) pipelineExecer(p pipelineProcessor) pipelineExecer {
return func(cmds []Cmder) error {
var firstErr error
for i := 0; i <= c.opt.MaxRetries; i++ {
for attempt := 0; attempt <= c.opt.MaxRetries; attempt++ {
if attempt > 0 {
time.Sleep(c.retryBackoff(attempt))
}
cn, _, err := c.getConn()
if err != nil {
setCmdsErr(cmds, err)
@ -206,18 +209,18 @@ func (c *baseClient) pipelineExecer(p pipelineProcessor) pipelineExecer {
}
canRetry, err := p(cn, cmds)
c.releaseConn(cn, err)
if err == nil {
return nil
}
if firstErr == nil {
firstErr = err
if err == nil || internal.IsRedisError(err) {
_ = c.connPool.Put(cn)
break
}
_ = c.connPool.Remove(cn)
if !canRetry || !internal.IsRetryableError(err) {
break
}
}
return firstErr
return firstCmdsErr(cmds)
}
}
@ -230,23 +233,17 @@ func (c *baseClient) pipelineProcessCmds(cn *pool.Conn, cmds []Cmder) (bool, err
// Set read timeout for all commands.
cn.SetReadTimeout(c.opt.ReadTimeout)
return pipelineReadCmds(cn, cmds)
return true, pipelineReadCmds(cn, cmds)
}
func pipelineReadCmds(cn *pool.Conn, cmds []Cmder) (retry bool, firstErr error) {
for i, cmd := range cmds {
func pipelineReadCmds(cn *pool.Conn, cmds []Cmder) error {
for _, cmd := range cmds {
err := cmd.readReply(cn)
if err == nil {
continue
}
if i == 0 {
retry = true
}
if firstErr == nil {
firstErr = err
if err != nil && !internal.IsRedisError(err) {
return err
}
}
return
return nil
}
func (c *baseClient) txPipelineProcessCmds(cn *pool.Conn, cmds []Cmder) (bool, error) {
@ -260,11 +257,11 @@ func (c *baseClient) txPipelineProcessCmds(cn *pool.Conn, cmds []Cmder) (bool, e
cn.SetReadTimeout(c.opt.ReadTimeout)
if err := c.txPipelineReadQueued(cn, cmds); err != nil {
setCmdsErr(cmds, err)
return false, err
}
_, err := pipelineReadCmds(cn, cmds)
return false, err
return false, pipelineReadCmds(cn, cmds)
}
func txPipelineWriteMulti(cn *pool.Conn, cmds []Cmder) error {
@ -276,21 +273,16 @@ func txPipelineWriteMulti(cn *pool.Conn, cmds []Cmder) error {
}
func (c *baseClient) txPipelineReadQueued(cn *pool.Conn, cmds []Cmder) error {
var firstErr error
// Parse queued replies.
var statusCmd StatusCmd
if err := statusCmd.readReply(cn); err != nil && firstErr == nil {
firstErr = err
if err := statusCmd.readReply(cn); err != nil {
return err
}
for _, cmd := range cmds {
for _ = range cmds {
err := statusCmd.readReply(cn)
if err != nil {
cmd.setErr(err)
if firstErr == nil {
firstErr = err
}
if err != nil && !internal.IsRedisError(err) {
return err
}
}

53
ring.go
View File

@ -35,6 +35,8 @@ type RingOptions struct {
Password string
MaxRetries int
MinRetryBackoff time.Duration
MaxRetryBackoff time.Duration
DialTimeout time.Duration
ReadTimeout time.Duration
@ -50,6 +52,19 @@ func (opt *RingOptions) init() {
if opt.HeartbeatFrequency == 0 {
opt.HeartbeatFrequency = 500 * time.Millisecond
}
switch opt.MinRetryBackoff {
case -1:
opt.MinRetryBackoff = 0
case 0:
opt.MinRetryBackoff = 8 * time.Millisecond
}
switch opt.MaxRetryBackoff {
case -1:
opt.MaxRetryBackoff = 0
case 0:
opt.MaxRetryBackoff = 512 * time.Millisecond
}
}
func (opt *RingOptions) clientOptions() *Options {
@ -165,6 +180,10 @@ func (c *Ring) Options() *RingOptions {
return c.opt
}
func (c *Ring) retryBackoff(attempt int) time.Duration {
return internal.RetryBackoff(attempt, c.opt.MinRetryBackoff, c.opt.MaxRetryBackoff)
}
// PoolStats returns accumulated connection pool stats.
func (c *Ring) PoolStats() *PoolStats {
var acc PoolStats
@ -241,6 +260,9 @@ func (c *Ring) ForEachShard(fn func(client *Client) error) error {
func (c *Ring) cmdInfo(name string) *CommandInfo {
err := c.cmdsInfoOnce.Do(func() error {
c.mu.RLock()
defer c.mu.RUnlock()
var firstErr error
for _, shard := range c.shards {
cmdsInfo, err := shard.Client.Command().Result()
@ -257,7 +279,11 @@ func (c *Ring) cmdInfo(name string) *CommandInfo {
if err != nil {
return nil
}
return c.cmdsInfo[name]
info := c.cmdsInfo[name]
if info == nil {
internal.Logf("info for cmd=%s not found", name)
}
return info
}
func (c *Ring) addClient(name string, cl *Client) {
@ -399,7 +425,7 @@ func (c *Ring) Pipelined(fn func(Pipeliner) error) ([]Cmder, error) {
return c.Pipeline().pipelined(fn)
}
func (c *Ring) pipelineExec(cmds []Cmder) (firstErr error) {
func (c *Ring) pipelineExec(cmds []Cmder) error {
cmdsMap := make(map[string][]Cmder)
for _, cmd := range cmds {
cmdInfo := c.cmdInfo(cmd.Name())
@ -410,36 +436,33 @@ func (c *Ring) pipelineExec(cmds []Cmder) (firstErr error) {
cmdsMap[name] = append(cmdsMap[name], cmd)
}
for i := 0; i <= c.opt.MaxRetries; i++ {
for attempt := 0; attempt <= c.opt.MaxRetries; attempt++ {
if attempt > 0 {
time.Sleep(c.retryBackoff(attempt))
}
var failedCmdsMap map[string][]Cmder
for name, cmds := range cmdsMap {
shard, err := c.shardByName(name)
if err != nil {
setCmdsErr(cmds, err)
if firstErr == nil {
firstErr = err
}
continue
}
cn, _, err := shard.Client.getConn()
if err != nil {
setCmdsErr(cmds, err)
if firstErr == nil {
firstErr = err
}
continue
}
canRetry, err := shard.Client.pipelineProcessCmds(cn, cmds)
shard.Client.releaseConn(cn, err)
if err == nil {
if err == nil || internal.IsRedisError(err) {
_ = shard.Client.connPool.Put(cn)
continue
}
if firstErr == nil {
firstErr = err
}
_ = shard.Client.connPool.Remove(cn)
if canRetry && internal.IsRetryableError(err) {
if failedCmdsMap == nil {
failedCmdsMap = make(map[string][]Cmder)
@ -454,5 +477,5 @@ func (c *Ring) pipelineExec(cmds []Cmder) (firstErr error) {
cmdsMap = failedCmdsMap
}
return firstErr
return firstCmdsErr(cmds)
}

13
tx.go
View File

@ -36,11 +36,10 @@ func (c *Client) Watch(fn func(*Tx) error, keys ...string) error {
return err
}
}
firstErr := fn(tx)
if err := tx.Close(); err != nil && firstErr == nil {
firstErr = err
}
return firstErr
err := fn(tx)
_ = tx.Close()
return err
}
// close closes the transaction, releasing any open resources.
@ -53,7 +52,7 @@ func (c *Tx) Close() error {
// of a transaction.
func (c *Tx) Watch(keys ...string) *StatusCmd {
args := make([]interface{}, 1+len(keys))
args[0] = "WATCH"
args[0] = "watch"
for i, key := range keys {
args[1+i] = key
}
@ -65,7 +64,7 @@ func (c *Tx) Watch(keys ...string) *StatusCmd {
// Unwatch flushes all the previously watched keys for a transaction.
func (c *Tx) Unwatch(keys ...string) *StatusCmd {
args := make([]interface{}, 1+len(keys))
args[0] = "UNWATCH"
args[0] = "unwatch"
for i, key := range keys {
args[1+i] = key
}