Spark Streaming任务延迟监控及告警

概述

StreamingListener 是针对spark streaming的各个阶段的事件监听机制。

StreamingListener接口

//需要监听spark streaming中各个阶段的事件只需实现这个特质中对应的事件函数即可//本身既有注释说明trait StreamingListener {  /** Called when the streaming has been started */  /** streaming 启动的事件 */  def onStreamingStarted(streamingStarted: StreamingListenerStreamingStarted) { }  /** Called when a receiver has been started */  /** 接收启动事件 */  def onReceiverStarted(receiverStarted: StreamingListenerReceiverStarted) { }  /** Called when a receiver has reported an error */  def onReceiverError(receiverError: StreamingListenerReceiverError) { }  /** Called when a receiver has been stopped */  def onReceiverStopped(receiverStopped: StreamingListenerReceiverStopped) { }  /** Called when a batch of jobs has been submitted for processing. */  /** 每个批次提交的事件 */  def onBatchSubmitted(batchSubmitted: StreamingListenerBatchSubmitted) { }  /** Called when processing of a batch of jobs has started.  */  /** 每个批次启动的事件 */  def onBatchStarted(batchStarted: StreamingListenerBatchStarted) { }  /** Called when processing of a batch of jobs has completed. */  /** 每个批次完成的事件  */  def onBatchCompleted(batchCompleted: StreamingListenerBatchCompleted) { }  /** Called when processing of a job of a batch has started. */  def onOutputOperationStarted(      outputOperationStarted: StreamingListenerOutputOperationStarted) { }  /** Called when processing of a job of a batch has completed. */  def onOutputOperationCompleted(      outputOperationCompleted: StreamingListenerOutputOperationCompleted) { }}

自定义StreamingListener

功能：监控批次处理时间，若超过阈值则告警，每次告警间隔2分钟

class SparkStreamingDelayListener(private val appName:String, private val duration: Int,private val times: Int) extends StreamingListener{  private val logger = LoggerFactory.getLogger("SparkStreamingDelayListener")//每个批次完成时执行  override def onBatchCompleted(batchCompleted: StreamingListenerBatchCompleted): Unit = {    val batchInfo = batchCompleted.batchInfo    val processingStartTime = batchCompleted.batchInfo.processingStartTime    val numRecords = batchCompleted.batchInfo.numRecords    val processingEndTime = batchInfo.processingEndTime    val processingDelay = batchInfo.processingDelay    val totalDelay = batchInfo.totalDelay    //将每次告警时间写入redis,用以判断告警间隔大于2分钟    val jedis = RedisClusterClient.getJedisClusterClient()    val current_time = (System.currentTimeMillis / 1000).toInt    val redis_time = jedis.get(appName)    var flag = false    if(redis_time==null || current_time-redis_time.toInt>120){      jedis.set(appName,current_time.toString)      flag = true    }        //若批次处理延迟大于批次时长指定倍数，并且告警间隔大约2分钟，则告警    if(totalDelay.get >= times * duration * 1000 && flag){      val monitorContent = appName+": numRecords ->"+numRecords+",processingDelay ->"+processingDelay.get/1000+" s,totalDelay -> "+totalDelay.get/1000+"s"      println(monitorContent)      val msg = "Streaming_"+appName+"_DelayTime:"+totalDelay.get/1000+"S"      val getURL = "http://node1:8002/message/weixin?msg="+msg      HttpClient.doGet(getURL)    }  }}

应用

//streamingListener不需要在配置中设置，可以直接添加到streamingContext中object My{    def main(args : Array[String]) : Unit = {        val sparkConf = new SparkConf()        val ssc = new StreamingContext(sparkConf,Seconds(20))        ssc.addStreamingListener(new SparkStreamingDelayListener("Userid2Redis", duration,times))        ....    }}

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