本地jedis版本过低踩的坑

约定不等于承诺〃 2022-06-03 03:38 748阅读 0赞

环境：jedis-2.7.3；redis-4.0.2

客户端使用JedisCluster连接redis集群报错如下：

![Center][]

原因：jedis通过JedisClusterInfoCache.discoverClusterNodesAndSlots方法获取集群节点信息，内部实现

public void discoverClusterNodesAndSlots(Jedis jedis) {
       
            this.w.lock();
    
            try {
       
                this.nodes.clear();
                this.slots.clear();
                String localNodes = jedis.clusterNodes();
                String[] arr$ = localNodes.split("\n");
                int len$ = arr$.length;
    
                for(int i$ = 0; i$ < len$; ++i$) {
       
                    String nodeInfo = arr$[i$];
                    ClusterNodeInformation clusterNodeInfo = nodeInfoParser.parse(nodeInfo, new HostAndPort(jedis.getClient().getHost(), jedis.getClient().getPort()));
                    HostAndPort targetNode = clusterNodeInfo.getNode();
                    this.setNodeIfNotExist(targetNode);
                    this.assignSlotsToNode(clusterNodeInfo.getAvailableSlots(), targetNode);
                }
            } finally {
       
                this.w.unlock();
            }
    
        }

关键就是这个jedis.clusterNodes()方法，它会调用cluster nodes指令，而redis4.0以上该指令会将其通信端口一并输出，注意后面的@18006

![Center 1][]

之前的redis版本作为比较：

2a0ebb6d554fc8aa8a936bc0c0c2a6583425cf7e 119.254.166.136:7031myself,master\- 0 0 1 connected 0\-5460

6f7119b06bb3316119f0bed3f793c2ce87983566 119.254.166.136:7036slave

6fd9a873b29f5e9a61756606ececa4a953a11db7 0 1479278388635 6 connected

1b42b9d25779ccd5555fb804d01ddfbdd20635bf 119.254.166.136:7032master\- 0 1479278389637 2 connected 5461\-10922

e22f9b0d7cb3fdb932926a1b4d9c3140e70255eb 119.254.166.136:7034slave 2a0ebb6d554fc8aa8a936bc0c0c2a6583425cf7e 0 1479278390639 4 connected

cd480d1b437ad323ae3e15e548db8faf43a5d766 119.254.166.136:7035slave 1b42b9d25779ccd5555fb804d01ddfbdd20635bf 0 1479278385630 5 connected

6fd9a873b29f5e9a61756606ececa4a953a11db7 119.254.166.136:7033master\- 0 1479278386632 3 connected 10923\-16383

结果就是报NumberFormatException

解决：直接将jedis版本升至最高，目前是jedis-2.9.0，问题解决！