apache-flink与elasticsearch的集成

mm5n2pyu 于 2021-06-25 发布在 Flink

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我正在尝试将flink与ElasticSearch2.1.1集成，我正在使用maven依赖项

<dependency>
        <groupId>org.apache.flink</groupId>
        <artifactId>flink-connector-elasticsearch2_2.10</artifactId>
        <version>1.1-SNAPSHOT</version>
    </dependency>

这是我从kafka队列中读取事件的java代码（工作正常），但不知怎么的，这些事件没有在elasticsearch中发布，而且也没有错误，在下面的代码中，如果我更改与端口、主机名和，elasticsearch的群集名或索引名，然后我立即看到一个错误，但目前它没有显示任何错误，也没有在elasticsearch中创建任何新文档

StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();

    // parse user parameters
    ParameterTool parameterTool = ParameterTool.fromArgs(args);

    DataStream<String> messageStream = env.addSource(new FlinkKafkaConsumer082<>(parameterTool.getRequired("topic"), new SimpleStringSchema(), parameterTool.getProperties()));

    messageStream.print();

    Map<String, String> config = new HashMap<>();
    config.put(ElasticsearchSink.CONFIG_KEY_BULK_FLUSH_MAX_ACTIONS, "1");
    config.put(ElasticsearchSink.CONFIG_KEY_BULK_FLUSH_INTERVAL_MS, "1");

    config.put("cluster.name", "FlinkDemo");

    List<InetSocketAddress> transports = new ArrayList<>();
    transports.add(new InetSocketAddress(InetAddress.getByName("localhost"), 9300));

    messageStream.addSink(new ElasticsearchSink<String>(config, transports, new TestElasticsearchSinkFunction()));

    env.execute();
}
private static class TestElasticsearchSinkFunction implements ElasticsearchSinkFunction<String> {
    private static final long serialVersionUID = 1L;

    public IndexRequest createIndexRequest(String element) {
        Map<String, Object> json = new HashMap<>();
        json.put("data", element);

        return Requests.indexRequest()
                .index("flink").id("hash"+element).source(json);
    }

    @Override
    public void process(String element, RuntimeContext ctx, RequestIndexer indexer) {
        indexer.add(createIndexRequest(element));
    }
}

Java elasticsearch apache-flink

来源：https://stackoverflow.com/questions/37514624/apache-flink-integration-with-elasticsearch

2条答案

按热度按时间

t1qtbnec1#

我找到了flink&elasticsearch连接器的一个很好的例子
第一个maven依赖项：

<dependency>
  <groupId>org.apache.flink</groupId>
  <artifactId>flink-connector-elasticsearch2_2.10</artifactId>
  <version>1.1-SNAPSHOT</version>
</dependency>

第二个示例java代码

public static void writeElastic(DataStream<String> input) {

    Map<String, String> config = new HashMap<>();

    // This instructs the sink to emit after every element, otherwise they would be buffered
    config.put("bulk.flush.max.actions", "1");
    config.put("cluster.name", "es_keira");

    try {
        // Add elasticsearch hosts on startup
        List<InetSocketAddress> transports = new ArrayList<>();
        transports.add(new InetSocketAddress("127.0.0.1", 9300)); // port is 9300 not 9200 for ES TransportClient

        ElasticsearchSinkFunction<String> indexLog = new ElasticsearchSinkFunction<String>() {
            public IndexRequest createIndexRequest(String element) {
                String[] logContent = element.trim().split("\t");
                Map<String, String> esJson = new HashMap<>();
                esJson.put("IP", logContent[0]);
                esJson.put("info", logContent[1]);

                return Requests
                        .indexRequest()
                        .index("viper-test")
                        .type("viper-log")
                        .source(esJson);
            }

            @Override
            public void process(String element, RuntimeContext ctx, RequestIndexer indexer) {
                indexer.add(createIndexRequest(element));
            }
        };

        ElasticsearchSink esSink = new ElasticsearchSink(config, transports, indexLog);
        input.addSink(esSink);
    } catch (Exception e) {
        System.out.println(e);
    }
}

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abithluo2#

我确实在本地机器上运行它并进行调试，但是，我唯一缺少的是正确配置日志记录，因为大多数弹性问题都在“log.warn”语句中描述。问题是elasticsearch-2.2.1客户端api中“bulkrequesthandler.java”内部出现异常，引发错误-“org.elasticsearch.action.actionrequestvalidationexception:validation failed:1:type is missing因为我已经创建了索引，但不是一个我觉得很奇怪的类型，因为它应该主要关注索引，并在默认情况下创建类型。

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apache-flink与elasticsearch的集成

2条答案

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