Question

我是暴风雨的新手，但我仍然在我的本地机器上配置了风暴。我做了一个eclipse项目，并从一个简单的例子来自互联网。现在我的拓扑结构已经提交但它无法正常工作。

是否提交了拓扑？是的，它已成功提交，因为我可以在风暴ui上看到它。

我的拓扑结构的工作原理是只打印一个数字（如果它是素数）。但它不打印它。

我提供的代码如下：

Spout Class：

public class NumberSpout extends BaseRichSpout 
{
    private SpoutOutputCollector collector;
    private static final Logger LOGGER = Logger.getLogger(SpoutOutputCollector.class);
    private static int currentNumber = 1;

    @Override
    public void open( Map conf, TopologyContext context, SpoutOutputCollector collector ) 
    {
        this.collector = collector;
    }

    @Override
    public void nextTuple() 
    {
        // Emit the next number
        LOGGER.info("Coming in spout tuble method");
        collector.emit( new Values( new Integer( currentNumber++ ) ) );
    }

    @Override
    public void ack(Object id) 
    {
    }

    @Override
    public void fail(Object id) 
    {
    }

    @Override
    public void declareOutputFields(OutputFieldsDeclarer declarer) 
    {
        declarer.declare( new Fields( "number" ) );
    }
}

螺栓类：

public class PrimeNumberBolt extends BaseRichBolt 
{   private static final Logger LOGGER = Logger.getLogger(PrimeNumberBolt.class);
    private OutputCollector collector;

    public void prepare( Map conf, TopologyContext context, OutputCollector collector ) 
    {
        this.collector = collector;
    }

    public void execute( Tuple tuple ) 
    {
        int number = tuple.getInteger( 0 );
        if( isPrime( number) )
        {
            LOGGER.info("Prime number printed is: )" +number);
           System.out.println( number );
        }
        collector.ack( tuple );
    }

    public void declareOutputFields( OutputFieldsDeclarer declarer ) 
    {
        declarer.declare( new Fields( "number" ) );
    }   

    private boolean isPrime( int n ) 
    {
        if( n == 1 || n == 2 || n == 3 )
        {
            return true;
        }

        // Is n an even number?
        if( n % 2 == 0 )
        {
            return false;
        }

        //if not, then just check the odds
        for( int i=3; i*i<=n; i+=2 ) 
        {
            if( n % i == 0)
            {
                return false;
            }
        }
        return true;
    }
}

拓扑类：

public class PrimeNumberTopology 
{
    public static void main(String[] args) 
    {
        TopologyBuilder builder = new TopologyBuilder();
        builder.setSpout( "spout", new NumberSpout(),1 );
        builder.setBolt( "prime", new PrimeNumberBolt(),1 )
                .shuffleGrouping("spout");
        Config conf = new Config();
        conf.put(Config.NIMBUS_HOST, "127.0.0.1");
        conf.setDebug(true);
        Map storm_conf = Utils.readStormConfig();
        storm_conf.put("nimbus.host", "127.0.0.1");
        Client client = NimbusClient.getConfiguredClient(storm_conf)
                .getClient();
        String inputJar = "/home/jamil/Downloads/storm-twitter-word-count-master/target/storm-test-1.0-SNAPSHOT.jar";
        NimbusClient nimbus = new NimbusClient("127.0.0.1",6627);
        // upload topology jar to Cluster using StormSubmitter
        String uploadedJarLocation = StormSubmitter.submitJar(storm_conf,
                inputJar);
        try {
            String jsonConf = JSONValue.toJSONString(storm_conf);
            nimbus.getClient().submitTopology("newtesttopology",
                    uploadedJarLocation, jsonConf, builder.createTopology());
        } catch (AlreadyAliveException ae) {
            ae.printStackTrace();
        } catch (InvalidTopologyException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (TException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

现在我想问为什么不打印？或者为什么不将它写入日志文件？

加：我正在从eclipse提交拓扑。

Answer 1

除了@Thomas Jungblut所说的（关于你的log4j配置）并假设这是你的拓扑的完整源代码，那么看看你的spout的nextTuple()方法。
你的鲸鱼喷水只是发出一个值，就是这样。很可能你错过了控制台中输出的输出，因为它被埋在大量其他记录输出之下你确定你只想发一个值吗？

风暴拓扑不起作用

1 个答案: