Java redis酒吧潜水艇和绝地武士，潜水艇因错误而坠毁_Java_Redis_Publish Subscribe_Jedis

Java redis酒吧潜水艇和绝地武士，潜水艇因错误而坠毁

java redis

Java redis酒吧潜水艇和绝地武士，潜水艇因错误而坠毁,java,redis,publish-subscribe,jedis,Java,Redis,Publish Subscribe,Jedis,全部我已经安装了最新的Redis 2.4.16，并尝试使用java的发布/订阅系统。我每秒都会给频道发一条信息。发布服务器没有问题，但订阅服务器因消息而崩溃例外情况： redis.clients.jedis.exceptions.JedisDataException: ERR only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context at redis.clients.jedis.Protocol.processErro

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我已经安装了最新的Redis 2.4.16，并尝试使用java的发布/订阅系统。我每秒都会给频道发一条信息。发布服务器没有问题，但订阅服务器因消息而崩溃

例外情况：

redis.clients.jedis.exceptions.JedisDataException: ERR only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context
at redis.clients.jedis.Protocol.processError(Protocol.java:59)
at redis.clients.jedis.Protocol.process(Protocol.java:66)
at redis.clients.jedis.Protocol.read(Protocol.java:131)
at redis.clients.jedis.Connection.getObjectMultiBulkReply(Connection.java:206)
at redis.clients.jedis.JedisPubSub.process(JedisPubSub.java:88)
at redis.clients.jedis.JedisPubSub.proceed(JedisPubSub.java:83)
at redis.clients.jedis.Jedis.subscribe(Jedis.java:1971)
at com.jedis.test.JedisSub$1.run(JedisSub.java:22)
at java.lang.Thread.run(Thread.java:680)

        final Jedis jedis = new Jedis("localhost");

        ExecutorService newFixedThreadPool = Executors.newFixedThreadPool(10);
        newFixedThreadPool.submit(new Runnable() {

            @Override
            public void run() {
                while(true){
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    jedis.publish("CC", new Date().toString());
                }

            }
        });

        JedisPool jedisPool = new JedisPool(poolConfig,"localhost", 6379, 100);
        final Jedis subscriberJedis = jedisPool.getResource();


        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    subscriberJedis.subscribe(new JedisPubSub() …..,"CC");
                } catch (Exception e) {
                   e.printStackTrace();
                }
            }
        }).start();

        jedisPool.returnResource(subscriberJedis);

    JedisPoolConfig poolConfig = new JedisPoolConfig();
    poolConfig.maxActive = 10;
    poolConfig.maxIdle = 5;
    poolConfig.minIdle = 1;
    poolConfig.testOnBorrow = true;
    poolConfig.numTestsPerEvictionRun = 10;
    poolConfig.timeBetweenEvictionRunsMillis = 60000;
    poolConfig.maxWait = 3000;
    poolConfig.whenExhaustedAction = org.apache.commons.pool.impl.GenericObjectPool.WHEN_EXHAUSTED_FAIL;

这是我的代码：

redis.clients.jedis.exceptions.JedisDataException: ERR only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context
at redis.clients.jedis.Protocol.processError(Protocol.java:59)
at redis.clients.jedis.Protocol.process(Protocol.java:66)
at redis.clients.jedis.Protocol.read(Protocol.java:131)
at redis.clients.jedis.Connection.getObjectMultiBulkReply(Connection.java:206)
at redis.clients.jedis.JedisPubSub.process(JedisPubSub.java:88)
at redis.clients.jedis.JedisPubSub.proceed(JedisPubSub.java:83)
at redis.clients.jedis.Jedis.subscribe(Jedis.java:1971)
at com.jedis.test.JedisSub$1.run(JedisSub.java:22)
at java.lang.Thread.run(Thread.java:680)

        final Jedis jedis = new Jedis("localhost");

        ExecutorService newFixedThreadPool = Executors.newFixedThreadPool(10);
        newFixedThreadPool.submit(new Runnable() {

            @Override
            public void run() {
                while(true){
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    jedis.publish("CC", new Date().toString());
                }

            }
        });

        JedisPool jedisPool = new JedisPool(poolConfig,"localhost", 6379, 100);
        final Jedis subscriberJedis = jedisPool.getResource();


        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    subscriberJedis.subscribe(new JedisPubSub() …..,"CC");
                } catch (Exception e) {
                   e.printStackTrace();
                }
            }
        }).start();

        jedisPool.returnResource(subscriberJedis);

    JedisPoolConfig poolConfig = new JedisPoolConfig();
    poolConfig.maxActive = 10;
    poolConfig.maxIdle = 5;
    poolConfig.minIdle = 1;
    poolConfig.testOnBorrow = true;
    poolConfig.numTestsPerEvictionRun = 10;
    poolConfig.timeBetweenEvictionRunsMillis = 60000;
    poolConfig.maxWait = 3000;
    poolConfig.whenExhaustedAction = org.apache.commons.pool.impl.GenericObjectPool.WHEN_EXHAUSTED_FAIL;

出版商：

redis.clients.jedis.exceptions.JedisDataException: ERR only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context
at redis.clients.jedis.Protocol.processError(Protocol.java:59)
at redis.clients.jedis.Protocol.process(Protocol.java:66)
at redis.clients.jedis.Protocol.read(Protocol.java:131)
at redis.clients.jedis.Connection.getObjectMultiBulkReply(Connection.java:206)
at redis.clients.jedis.JedisPubSub.process(JedisPubSub.java:88)
at redis.clients.jedis.JedisPubSub.proceed(JedisPubSub.java:83)
at redis.clients.jedis.Jedis.subscribe(Jedis.java:1971)
at com.jedis.test.JedisSub$1.run(JedisSub.java:22)
at java.lang.Thread.run(Thread.java:680)

        final Jedis jedis = new Jedis("localhost");

        ExecutorService newFixedThreadPool = Executors.newFixedThreadPool(10);
        newFixedThreadPool.submit(new Runnable() {

            @Override
            public void run() {
                while(true){
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    jedis.publish("CC", new Date().toString());
                }

            }
        });

        JedisPool jedisPool = new JedisPool(poolConfig,"localhost", 6379, 100);
        final Jedis subscriberJedis = jedisPool.getResource();


        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    subscriberJedis.subscribe(new JedisPubSub() …..,"CC");
                } catch (Exception e) {
                   e.printStackTrace();
                }
            }
        }).start();

        jedisPool.returnResource(subscriberJedis);

    JedisPoolConfig poolConfig = new JedisPoolConfig();
    poolConfig.maxActive = 10;
    poolConfig.maxIdle = 5;
    poolConfig.minIdle = 1;
    poolConfig.testOnBorrow = true;
    poolConfig.numTestsPerEvictionRun = 10;
    poolConfig.timeBetweenEvictionRunsMillis = 60000;
    poolConfig.maxWait = 3000;
    poolConfig.whenExhaustedAction = org.apache.commons.pool.impl.GenericObjectPool.WHEN_EXHAUSTED_FAIL;

订户：

redis.clients.jedis.exceptions.JedisDataException: ERR only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context
at redis.clients.jedis.Protocol.processError(Protocol.java:59)
at redis.clients.jedis.Protocol.process(Protocol.java:66)
at redis.clients.jedis.Protocol.read(Protocol.java:131)
at redis.clients.jedis.Connection.getObjectMultiBulkReply(Connection.java:206)
at redis.clients.jedis.JedisPubSub.process(JedisPubSub.java:88)
at redis.clients.jedis.JedisPubSub.proceed(JedisPubSub.java:83)
at redis.clients.jedis.Jedis.subscribe(Jedis.java:1971)
at com.jedis.test.JedisSub$1.run(JedisSub.java:22)
at java.lang.Thread.run(Thread.java:680)

        final Jedis jedis = new Jedis("localhost");

        ExecutorService newFixedThreadPool = Executors.newFixedThreadPool(10);
        newFixedThreadPool.submit(new Runnable() {

            @Override
            public void run() {
                while(true){
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    jedis.publish("CC", new Date().toString());
                }

            }
        });

        JedisPool jedisPool = new JedisPool(poolConfig,"localhost", 6379, 100);
        final Jedis subscriberJedis = jedisPool.getResource();


        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    subscriberJedis.subscribe(new JedisPubSub() …..,"CC");
                } catch (Exception e) {
                   e.printStackTrace();
                }
            }
        }).start();

        jedisPool.returnResource(subscriberJedis);

    JedisPoolConfig poolConfig = new JedisPoolConfig();
    poolConfig.maxActive = 10;
    poolConfig.maxIdle = 5;
    poolConfig.minIdle = 1;
    poolConfig.testOnBorrow = true;
    poolConfig.numTestsPerEvictionRun = 10;
    poolConfig.timeBetweenEvictionRunsMillis = 60000;
    poolConfig.maxWait = 3000;
    poolConfig.whenExhaustedAction = org.apache.commons.pool.impl.GenericObjectPool.WHEN_EXHAUSTED_FAIL;

池配置：

redis.clients.jedis.exceptions.JedisDataException: ERR only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context
at redis.clients.jedis.Protocol.processError(Protocol.java:59)
at redis.clients.jedis.Protocol.process(Protocol.java:66)
at redis.clients.jedis.Protocol.read(Protocol.java:131)
at redis.clients.jedis.Connection.getObjectMultiBulkReply(Connection.java:206)
at redis.clients.jedis.JedisPubSub.process(JedisPubSub.java:88)
at redis.clients.jedis.JedisPubSub.proceed(JedisPubSub.java:83)
at redis.clients.jedis.Jedis.subscribe(Jedis.java:1971)
at com.jedis.test.JedisSub$1.run(JedisSub.java:22)
at java.lang.Thread.run(Thread.java:680)

        final Jedis jedis = new Jedis("localhost");

        ExecutorService newFixedThreadPool = Executors.newFixedThreadPool(10);
        newFixedThreadPool.submit(new Runnable() {

            @Override
            public void run() {
                while(true){
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    jedis.publish("CC", new Date().toString());
                }

            }
        });

        JedisPool jedisPool = new JedisPool(poolConfig,"localhost", 6379, 100);
        final Jedis subscriberJedis = jedisPool.getResource();


        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    subscriberJedis.subscribe(new JedisPubSub() …..,"CC");
                } catch (Exception e) {
                   e.printStackTrace();
                }
            }
        }).start();

        jedisPool.returnResource(subscriberJedis);

    JedisPoolConfig poolConfig = new JedisPoolConfig();
    poolConfig.maxActive = 10;
    poolConfig.maxIdle = 5;
    poolConfig.minIdle = 1;
    poolConfig.testOnBorrow = true;
    poolConfig.numTestsPerEvictionRun = 10;
    poolConfig.timeBetweenEvictionRunsMillis = 60000;
    poolConfig.maxWait = 3000;
    poolConfig.whenExhaustedAction = org.apache.commons.pool.impl.GenericObjectPool.WHEN_EXHAUSTED_FAIL;

为了安装Redis，我只使用了以下命令

make PREFIX=/Users/ggg/dev/dist/redis/ install

在此之后，我没有使用

/install\u server.sh

绝地版本是2.1.0，平台是MacOSX

注意：我注意到订户在30秒左右崩溃开始后

发布者和订阅者的代码都有各自的错误

这个错误是因为发布者和订阅者之间不能共享Redis连接。实际上，发布服务器需要一个连接（或连接池），订阅服务器线程只需要一个专用连接。每个进程运行一个订户线程通常就足够了

在这里，在订阅服务器线程完成之前，过早地将subscriberJedis连接返回到池，因此连接是共享的

在发布者中：

redis.clients.jedis.exceptions.JedisDataException: ERR only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context
at redis.clients.jedis.Protocol.processError(Protocol.java:59)
at redis.clients.jedis.Protocol.process(Protocol.java:66)
at redis.clients.jedis.Protocol.read(Protocol.java:131)
at redis.clients.jedis.Connection.getObjectMultiBulkReply(Connection.java:206)
at redis.clients.jedis.JedisPubSub.process(JedisPubSub.java:88)
at redis.clients.jedis.JedisPubSub.proceed(JedisPubSub.java:83)
at redis.clients.jedis.Jedis.subscribe(Jedis.java:1971)
at com.jedis.test.JedisSub$1.run(JedisSub.java:22)
at java.lang.Thread.run(Thread.java:680)

        final Jedis jedis = new Jedis("localhost");

        ExecutorService newFixedThreadPool = Executors.newFixedThreadPool(10);
        newFixedThreadPool.submit(new Runnable() {

            @Override
            public void run() {
                while(true){
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    jedis.publish("CC", new Date().toString());
                }

            }
        });

        JedisPool jedisPool = new JedisPool(poolConfig,"localhost", 6379, 100);
        final Jedis subscriberJedis = jedisPool.getResource();


        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    subscriberJedis.subscribe(new JedisPubSub() …..,"CC");
                } catch (Exception e) {
                   e.printStackTrace();
                }
            }
        }).start();

        jedisPool.returnResource(subscriberJedis);

    JedisPoolConfig poolConfig = new JedisPoolConfig();
    poolConfig.maxActive = 10;
    poolConfig.maxIdle = 5;
    poolConfig.minIdle = 1;
    poolConfig.testOnBorrow = true;
    poolConfig.numTestsPerEvictionRun = 10;
    poolConfig.timeBetweenEvictionRunsMillis = 60000;
    poolConfig.maxWait = 3000;
    poolConfig.whenExhaustedAction = org.apache.commons.pool.impl.GenericObjectPool.WHEN_EXHAUSTED_FAIL;

因为您有10个线程池，所以不应该在这些线程之间共享唯一的连接。这是使用连接池的最佳位置，必须在每个线程中抓取和释放连接

    // This should be a global singleton
    JedisPool jedisPool = new JedisPool(poolConfig,"localhost", 6379, 100);

    ExecutorService newFixedThreadPool = Executors.newFixedThreadPool(10);
    newFixedThreadPool.submit(new Runnable() {

        @Override
        public void run() {
            while(true){
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                Jedis jedis = jedisPool.getResource();
                try {
                   jedis.publish("CC", new Date().toString());
                } catch (Exception e) {
                   e.printStackTrace();
                } finally {
                   jedisPool.returnResource(jedis);
                }
            }

        }
    });

在订阅服务器中：

redis.clients.jedis.exceptions.JedisDataException: ERR only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context
at redis.clients.jedis.Protocol.processError(Protocol.java:59)
at redis.clients.jedis.Protocol.process(Protocol.java:66)
at redis.clients.jedis.Protocol.read(Protocol.java:131)
at redis.clients.jedis.Connection.getObjectMultiBulkReply(Connection.java:206)
at redis.clients.jedis.JedisPubSub.process(JedisPubSub.java:88)
at redis.clients.jedis.JedisPubSub.proceed(JedisPubSub.java:83)
at redis.clients.jedis.Jedis.subscribe(Jedis.java:1971)
at com.jedis.test.JedisSub$1.run(JedisSub.java:22)
at java.lang.Thread.run(Thread.java:680)

        final Jedis jedis = new Jedis("localhost");

        ExecutorService newFixedThreadPool = Executors.newFixedThreadPool(10);
        newFixedThreadPool.submit(new Runnable() {

            @Override
            public void run() {
                while(true){
                    try {
                        Thread.sleep(1000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    jedis.publish("CC", new Date().toString());
                }

            }
        });

        JedisPool jedisPool = new JedisPool(poolConfig,"localhost", 6379, 100);
        final Jedis subscriberJedis = jedisPool.getResource();


        new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    subscriberJedis.subscribe(new JedisPubSub() …..,"CC");
                } catch (Exception e) {
                   e.printStackTrace();
                }
            }
        }).start();

        jedisPool.returnResource(subscriberJedis);

    JedisPoolConfig poolConfig = new JedisPoolConfig();
    poolConfig.maxActive = 10;
    poolConfig.maxIdle = 5;
    poolConfig.minIdle = 1;
    poolConfig.testOnBorrow = true;
    poolConfig.numTestsPerEvictionRun = 10;
    poolConfig.timeBetweenEvictionRunsMillis = 60000;
    poolConfig.maxWait = 3000;
    poolConfig.whenExhaustedAction = org.apache.commons.pool.impl.GenericObjectPool.WHEN_EXHAUSTED_FAIL;

在订阅服务器中，您需要一个专用连接

    new Thread(new Runnable() {
        @Override
        public void run() {
            Jedis subscriberJedis = new Jedis("localhost");
            try {
                subscriberJedis.subscribe(new JedisPubSub() …..,"CC");
            } catch (Exception e) {
               e.printStackTrace();
            }
        }
    }).start();

如果您需要订阅不同的频道或模式，最好在同一线程中为同一连接设置其他订阅。

绝地武士池的默认大小是多少？我使用一个Executor固定线程池来处理50个线程。

    new Thread(new Runnable() {
        @Override
        public void run() {
            Jedis subscriberJedis = new Jedis("localhost");
            try {
                subscriberJedis.subscribe(new JedisPubSub() …..,"CC");
            } catch (Exception e) {
               e.printStackTrace();
            }
        }
    }).start();