无法从初始 URI 检索初始集群分区 [RedisURI [host='127.0.0.1', port=7001]]

我正在开发 Lettuce 集群 Java 客户端。它设置在一个bolt拓扑（Apache Strom）。spout正在读取数据kafka并将其传递给bolt。但是，当我开始拓扑时，我收到以下错误消息并且程序终止。我错过了什么吗？是什么原因造成的？

堆栈跟踪

29502 [Thread-17-RecommendationLettuceBolt-executor[2 2]] 错误 o.a.s.util - 异步循环终止！ io.lettuce.core.RedisException：无法从初始 URI 检索初始集群分区 [RedisURI [host='127.0.0.1', port=7001]] 在 io.lettuce.core.cluster.RedisClusterClient.loadPartitions(RedisClusterClient.java:865) ~[lettuce-core-5.1.7.RELEASE.jar:?] 在 io.lettuce.core.cluster.RedisClusterClient.initializePartitions(RedisClusterClient.java:819) ~[lettuce-core-5.1.7.RELEASE.jar:?] 在 io.lettuce.core.cluster.RedisClusterClient.connect(RedisClusterClient.java:345) ~[lettuce-core-5.1.7.RELEASE.jar:?] 在 com.projectName.indexer.lettuce.LettuceClusterClientProvider.getConnection(LettuceClusterClientProvider.java:72) ~[classes/:?] 在 com.projectName.indexer.lettuce.LettuceCacheRepopulationHandler.openLettuceConnection(LettuceCacheRepopulationHandler.java:42) ~[classes/:?] 在 com.projectName.indexer.bolts.RecommendationLettuceBolt.prepare(RecommendationLettuceBolt.java:35) ~[classes/:?] 在 org.apache.storm.daemon.executor$fn__8058$fn__8071.invoke(executor.clj:795) ~[storm-core-1.0.2.jar:1.0.2] 在 org.apache.storm.util$async_loop$fn__624.invoke(util.clj:482) [storm-core-1.0.2.jar:1.0.2] 在 clojure.lang.AFn.run(AFn.java:22) [clojure-1.7.0.jar:?] 在 java.base/java.lang.Thread.run(Thread.java:844) [?:?] 引起原因：io.lettuce.core.RedisConnectionException：无法在 [RedisURI [host='127.0.0.1', port=7001]] 处建立与 Redis 集群的连接 在 io.lettuce.core.cluster.topology.AsyncConnections.get(AsyncConnections.java:89) ~[lettuce-core-5.1.7.RELEASE.jar:?] 在 io.lettuce.core.cluster.topology.ClusterTopologyRefresh.loadViews(ClusterTopologyRefresh.java:73) ~[lettuce-core-5.1.7.RELEASE.jar:?] 在 io.lettuce.core.cluster.RedisClusterClient.doLoadPartitions(RedisClusterClient.java:871) ~[lettuce-core-5.1.7.RELEASE.jar:?] 在 io.lettuce.core.cluster.RedisClusterClient.loadPartitions(RedisClusterClient.java:844) ~[lettuce-core-5.1.7.RELEASE.jar:?] ... 9 更多

输入代码

private void init() {
       redisUri = RedisURI.Builder
                .redis(lettuceConfig.getLettuceClusterHost())
                .withPort(lettuceConfig.getLettuceClusterPort())
                .withTimeout(Duration.ofMillis(lettuceConfig.getLettuceClusterTimeout()))
                .build();
}


public StatefulRedisClusterConnection getConnection() {
        if (connection == null || !connection.isOpen()) {
            redisClusterClient = RedisClusterClient.create(redisUri);
            final ClusterTopologyRefreshOptions topologyRefreshOptions = ClusterTopologyRefreshOptions.builder()
                    .enablePeriodicRefresh(Duration.ofMinutes(BoltConstants.Lettuce.PERIODIC_REFRESH_TIME_IN_MIN))
                    .enableAdaptiveRefreshTrigger()
                    .build();
            final ClusterClientOptions clusterClientOptions = ClusterClientOptions.builder()
                    .autoReconnect(true)
                    .topologyRefreshOptions(topologyRefreshOptions)
                    .build();
            redisClusterClient.setOptions(clusterClientOptions);
            connection = redisClusterClient.connect(SnappyCompressor.wrap(new StringCodec()));
            log.info("Connected to Redis client lettuce. lettuce connection is up and running.");
        }
        return connection;
    }

环境

compile 'io.lettuce:lettuce-core:5.1.7.RELEASE'

出现这个错误是因为我还没有安装Redis集群在我的机器本地。

我使用这些步骤解决了

https://redis.io/download https://redis.io/download并运行以下命令安装 https://redis.io/download#installation

$ wget http://download.redis.io/releases/redis-5.0.5.tar.gz
$ tar xzf redis-5.0.5.tar.gz
$ cd redis-5.0.5
$ make //The binaries that are now compiled are available in the src directory
$ src/redis-server

使用 create-cluster 脚本创建 Redis 集群 https://redis.io/topics/cluster-tutorial

现在检查redis-5.0.5/utils/create-clusterRedis 发行版中的目录。有一个脚本叫create-cluster里面是一个简单的 bash 脚本。要启动具有 3 个主节点和 3 个从节点的 6 节点集群，只需键入以下命令：

$ create-cluster start  // start 
$ create-cluster create // create cluster

$ create-cluster stop // for stoping 
$ create-cluster clean // clean all the cluster

您将在终端中看到以下输出

$ ps aux |grep redis
300067846        28222   0.6  0.0  4379932   2612   ??  Ss    7:41PM   0:00.73 ../../src/redis-server *:30004 [cluster]                  
300067846        28227   0.5  0.0  4380956   2604   ??  Ss    7:41PM   0:00.71 ../../src/redis-server *:30006 [cluster]                  
300067846        28218   0.4  0.0  4381980   2676   ??  Ss    7:41PM   0:00.73 ../../src/redis-server *:30002 [cluster]                  
300067846        28216   0.4  0.0  4374812   2576   ??  Ss    7:41PM   0:00.50 ../../src/redis-server *:30001 [cluster]                  
300067846        28225   0.4  0.0  4380956   2632   ??  Ss    7:41PM   0:00.68 ../../src/redis-server *:30005 [cluster]                  
300067846        28220   0.3  0.0  4379932   2596   ??  Ss    7:41PM   0:00.52 ../../src/redis-server *:30003 [cluster]                  
300067846        85550   0.0  0.0  4309420   1128   ??  S     3:08PM   0:07.76 redis-server *:6379

查看所有主从节点

../redis-5.0.5/utils/create-cluster$ cat nodes-3000*.conf

您可以更新 Redis 集群配置。打开vi create-cluster并根据需要更新以下配置。

// default config are these 
CLUSTER_HOST=127.0.0.1
PORT=30000
TIMEOUT=2000
NODES=6
REPLICAS=1