dongshuohuan5291 2018-11-18 04:58
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Redis在Docker容器中失去连接

I am making a PubSub using redigo and the connection is created by redis pool.

This is the Redis Pool code:

package main

import (
    "os"
    "os/signal"
    "syscall"
    "time"

    "github.com/gomodule/redigo/redis"
)

type IRedis interface {
    Addr() string
    Conn() redis.Conn
    Set(key string, body string) error
    Close()
}

type Redis struct {
    addr string
    pool *redis.Pool
}

func NewRedis(addr string) *Redis {
    r := &Redis{
        addr,
        &redis.Pool{
            MaxIdle:     50000,
            IdleTimeout: 240 * time.Second,
            Dial: func() (redis.Conn, error) {
                c, err := redis.Dial("tcp", addr)
                if err != nil {
                    return nil, err
                }
                return c, err
            },
            TestOnBorrow: func(c redis.Conn, t time.Time) error {
                _, err := c.Do("PING")
                return err
            },
        },
    }

    r.cleanupHook()
    return r
}

func (r *Redis) cleanupHook() {
    c := make(chan os.Signal, 1)
    signal.Notify(c, os.Interrupt)
    signal.Notify(c, syscall.SIGTERM)
    signal.Notify(c, syscall.SIGKILL)
    go func() {
        <-c
        r.pool.Close()
        os.Exit(0)
    }()
}

func (r *Redis) Addr() string {
    return r.addr
}

func (r *Redis) Conn() redis.Conn {
    return r.pool.Get()
}

func (r *Redis) Set(key string, body string) error {
    p := r.pool.Get()
    defer p.Close()

    _, err := p.Do("SET", key, body)
    return err
}

func (r *Redis) Close() {
    r.pool.Close()
}

This is my PubSub code:

package main

import (
    "log"

    "github.com/gomodule/redigo/redis"
)

type PubSub struct {
    send chan string
    conn *redis.PubSubConn
}

func NewPubSub(s chan string, c *redis.PubSubConn) (*PubSub, error) {
    err := c.Subscribe("urls")
    if err != nil {
        return nil, err
    }

    return &PubSub{s, c}, nil
}

func (ps *PubSub) Start() {
    for {
        switch v := ps.conn.Receive().(type) {
        case redis.Message:
            data := string(v.Data)
            ps.send <- data

        case redis.Subscription:
            log.Printf("subscription message: %s: %s %d
", v.Channel, v.Kind, v.Count)

        case error:
            log.Println("error:", v)
            return
        }
    }
}

func (ps *PubSub) Close() {
    ps.conn.Close()
}

and after I receive 10k messages in my PubSub channel the connection is lost and I receive an redis.Error with the message EOF

Any thoughts why this is happen? Even when I run locally the problem happens

  • 写回答

1条回答

  • doujiao1949 2018-11-18 22:32
    关注

    The problem was with parameter in redis conf called client-output-buffer-limit pubsub which the default value is 32mb 8mb 60 and when the limit is reached redis closes the connection with the pubsub. To solve it I've increased the value.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
    评论

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