[英]having issues with BlockingQueue java , implementation of Storm (Distributed computing)?
这是我的输入喷口的代码片段,用于将元组发送到处理节点,以在集群上进行流处理。 问题是BlockingQueue正在抛出InterruptedException。
private SpoutOutputCollector collector;
public BlockingQueue<String> blockingQueue = new LinkedBlockingQueue<String>();
public boolean isDistributed() {
return true;
}
public void open(@SuppressWarnings("rawtypes") final Map conf, final TopologyContext context,
final SpoutOutputCollector collector) {
this.collector=collector;
}
@Override
public void nextTuple() {
try {
//Utils.sleep(100);
collector.emit(new Values("Single Temperature Reading", blockingQueue.take()));
} catch (InterruptedException e) {
e.printStackTrace();
}
}
public void readInputfile() throws IOException, InterruptedException{
FileInputStream file = new FileInputStream("/home/529076/Desktop/Temperature");
DataInputStream readDate=new DataInputStream(file);
BufferedReader readText=new BufferedReader(new InputStreamReader(readDate));
String line;
String singleReading = null;
while((line=readText.readLine())!=null){
singleReading=line;
blockingQueue.add(singleReading);
}
}
@Override
public void declareOutputFields(OutputFieldsDeclarer declarer) {
declarer.declare(new Fields("Single Temperature Reading"));
}
异常描述如下:
java.lang.InterruptedException10930 [Thread-20]信息backtype.storm.util-异步循环中断!
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.reportInterruptAfterWait(AbstractQueuedSynchronizer.java:1961)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:1996)
at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:399)
at com.tcs.storm.test.InputStreamSpout.nextTuple(InputStreamSpout.java:65)
at backtype.storm.daemon.task$fn__3349$fn__3404.invoke(task.clj:413)
而nextTuple(InputStreamSpout.java:65是------>
collector.emit(new Values("Single Temperature Reading", blockingQueue.take()));
谢谢
该错误是由于以下事实造成的:-BlockingQueue没有在输出收集器中初始化;
在Storm中,建议在prepare()/ open()方法中初始化Bolts / Spouts的字段。
原因是在从其上载拓扑的节点上创建了Bolts / Spouts:将在此处构造BlockingQueue。 然后将螺栓/喷口序列化并分发到工作程序节点,在此对它们进行反序列化。 序列化/反序列化的过程可能无法保留在构造Bolt / Spout时设置的字段的所有属性。 在prepare()或open()中初始化的字段没有此问题。
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