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

Question

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

堆栈跟踪

29502 [Thread-17-RecommendationLettuceBolt-executor[2 2]] 错误 oasutil - 异步循环死了！io.lettuce.core.RedisException：无法从 io.lettuce.core.cluster.RedisClusterClient.loadPartitions(RedisClusterClient.java:865) 处的初始 URI [RedisURI [host='127.0.0.1', port=7001]] 检索初始集群分区) ~[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。

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'

Answer 1

错误是因为我没有在我的机器上本地安装redis 集群。

我使用这些步骤解决了

https://redis.io/download并运行下面的命令安装

$ 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

现在检查redis-5.0.5/utils/create-clusterRedis发行版中的目录。create-cluster里面有一个脚本，它是一个简单的 bash 脚本。为了启动一个有 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。vi create-cluster根据需要打开并更新以下配置。

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