搭建高性能集群报JedisNoReachableClusterNodeException异常(No reachable node in cluster)

最新推荐文章于 2024-05-09 09:45:46 发布

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本文详细解析了在搭建Redis高性能集群过程中遇到的连接失败问题，包括SLF4J日志框架配置错误及JedisNoReachableClusterNodeException异常的解决方法，通过正确引入依赖、配置防火墙等步骤，最终成功实现集群的稳定连接。

最近在搭建Redis高性能集群时,报如下错误

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.

Exception in thread "main" redis.clients.jedis.exceptions.JedisNoReachableClusterNodeException: No reachable node in cluster
    at redis.clients.jedis.JedisSlotBasedConnectionHandler.getConnection(JedisSlotBasedConnectionHandler.java:61)
    at redis.clients.jedis.JedisSlotBasedConnectionHandler.getConnectionFromSlot(JedisSlotBasedConnectionHandler.java:78)
    at redis.clients.jedis.JedisClusterCommand.runWithRetries(JedisClusterCommand.java:102)
    at redis.clients.jedis.JedisClusterCommand.run(JedisClusterCommand.java:25)
    at redis.clients.jedis.JedisCluster.set(JedisCluster.java:112)
    at com.rpc.demo.XXX.main(XXX.java:30)

Process finished with exit code 1

根据错误提示

第一，需要导入slf4j的jar包和依赖包

<dependency>
  <groupId>redis.clients</groupId>
  <artifactId>jedis</artifactId>
  <version>3.0.0</version>
</dependency>

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-api</artifactId>
  <version>1.7.25</version>
</dependency>

<dependency>
  <groupId>org.slf4j</groupId>
  <artifactId>slf4j-log4j12</artifactId>
  <version>1.7.3</version>
</dependency>

第二，导入jar包以后，还报

Exception in thread "main" redis.clients.jedis.exceptions.JedisNoReachableClusterNodeException: No reachable node in cluster这个错误？

这是为什么呢？

测试原代码是

package com.rpc.demo.util;

import java.io.IOException;
import java.util.HashSet;
import java.util.Set;
import redis.clients.jedis.HostAndPort;
import redis.clients.jedis.JedisCluster;
import redis.clients.jedis.JedisPoolConfig;


/**
 ⦁ 访问redis集群
 ⦁ @author zsf
 ⦁ 
 */
public class RedisCluster
{
    public static void main(String[] args) throws IOException {
        Set<HostAndPort> jedisClusterNode = new HashSet<HostAndPort>();
        jedisClusterNode.add(new HostAndPort("192.168.213.131", 8001));
        jedisClusterNode.add(new HostAndPort("192.168.213.131", 8002));
        jedisClusterNode.add(new HostAndPort("192.168.213.131", 8003));
        jedisClusterNode.add(new HostAndPort("192.168.213.131", 8004));
        jedisClusterNode.add(new HostAndPort("192.168.213.131", 8005));
        jedisClusterNode.add(new HostAndPort("192.168.213.131", 8006));

        JedisPoolConfig config = new JedisPoolConfig();
        config.setMaxTotal(100);
        config.setMaxIdle(10);
        config.setTestOnBorrow(true);
        JedisCluster jedisCluster = new JedisCluster(jedisClusterNode, 6000, 10,
                config);
        System.out.println(jedisCluster.set("student", "zsf"));
        System.out.println(jedisCluster.set("age", "18"));
        System.out.println(jedisCluster.get("student"));
        System.out.println(jedisCluster.get("age"));
        jedisCluster.close();
    }
}

试了网上好多方法，都不行，这是什么原因呢?

试了试，能不能拼通吧，ping 192.168.213.131，能拼通！

突然想起，是不是192.168.213.131这台机器上防火墙，没有放开端口啊？机器上安装是centos7，于是把防火墙直接关了。

[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# firewall-cmd --state

然后再运行，居然好了！