Question

我正在研究Lettuce集群Java客户端。它是在bolt拓扑（Apache Strom）中设置的。 spout正在从kafka读取数据并将其传递给bolt。但是，当我启动拓扑时，出现以下错误消息，程序终止。我想念什么吗？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-异步循环死了！ 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]]建立与Redis群集的连接在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 :?] ...还有9个

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

该错误即将到来，因为我尚未在您的计算机上本地安装 redis群集。

我通过以下步骤解决了

https://redis.io/download并在命令Installation下运行

$ 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

Creating a Redis Cluster using the create-cluster script

现在检查Redis发行版中的redis-5.0.5/utils/create-cluster目录。内部有一个名为create-cluster的脚本，它是一个简单的bash脚本。为了启动具有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

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

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

堆栈跟踪

输入代码

环境

1 个答案: