Apache Storm Trident 和 Kafka Spout 集成

Question

我无法找到将 Kafka 与 Apache Storm Trident 正确集成的良好文档。我试图在这里查看之前发布的相关问题，但没有足够的信息。

我想将 Trident 与 Kafka 连接为 OpaqueTridentKafkaSpout。这是当前工作的示例代码

GlobalPartitionInformation globalPartitionInformation  = new GlobalPartitionInformation(properties.getProperty("topic", "mytopic"));
Broker brokerForPartition0 = new Broker("IP1",9092);
Broker brokerForPartition1 = new Broker("IP2", 9092);
Broker brokerForPartition2 = new Broker("IP3:9092");

globalPartitionInformation.addPartition(0, brokerForPartition0);//mapping from partition 0 to brokerForPartition0
globalPartitionInformation.addPartition(1, brokerForPartition1);//mapping from partition 1 to brokerForPartition1
globalPartitionInformation.addPartition(2, brokerForPartition2);//mapping from partition 2 to brokerForPartition2
StaticHosts staticHosts = new StaticHosts(globalPartitionInformation);
TridentKafkaConfig tridentKafkaConfig = new TridentKafkaConfig(hosts,properties.getProperty("topic", "mytopic"));
tridentKafkaConfig.scheme = new SchemeAsMultiScheme(new StringScheme());
OpaqueTridentKafkaSpout kafkaSpout = new OpaqueTridentKafkaSpout(tridentKafkaConfig);

有了这个，我可以为我的拓扑生成流，如下面的代码所示

TridentTopology topology = new TridentTopology();
Stream analyticsStream  = topology.newStream("spout", kafkaSpout).parallelismHint(Integer.valueOf(properties.getProperty("spout","6")))

虽然我提供了并行性和我的分区，但只有 1 个 Kafka Spout 执行器正在运行，因此我无法很好地扩展它。

谁能指导我更好地集成 Apache Storm Trident (2.0.0) 和 Apache Kafka (1.0)，每个集群都有 3 个节点？

此外，一旦它完成从 Kafka 的读取，我就会不断收到这些日志

2018-04-09 14:17:34.119 o.a.s.k.KafkaUtils Thread-15-spout-spout-executor[79 79] [INFO] Metrics Tick: Not enough data to calculate spout lag.  2018-04-09 14:17:34.129 o.a.s.k.KafkaUtils Thread-21-spout-spout-executor[88 88] [INFO] Metrics Tick: Not enough data to calculate spout lag.

在 Storm UI 中，我可以看到上面消息的确认。有什么建议忽略指标 Ticks 吗？

Answer 1

如果您仍然使用 Storm 2.0.0，我认为您应该切换到storm-kafka-client Trident spout。 Storm-kafka 模块仅用于支持较旧的 Kafka 版本，因为底层的 Kafka API (SimpleConsumer) 正在被删除。新模块从 0.10.0.0 及更高版本开始支持 Kafka。

您可以在此处https://github.com/apache/storm/blob/master/examples/storm-kafka-client-examples/src/main/java/org/apache/storm/kafka/trident/TridentKafkaClientTopologyNamedTopics.java 找到新喷嘴的 Trident 拓扑示例。