Error: no streaming listener attached to the spark app is the error we are observing post accessing streaming statistics API. Please help us with this issue ASAP. Thanks.

[swetha]

Issue: Spark structured streaming application

After adding the listener jar file in the cluster init script, the listener is working (From what I see in the stdout/log4j logs)

But when I try to hit the

'Content-Type: application/json' http://host:port/api/v1/applications/app-id/streaming/statistics end point

It is showing no streaming listener attached to spark application

Details:

We have created a jar file with the class file containing below code and have made it available to cluster using below shell script

Shell script:

#!/bin/bash

cp /dbfs/FileStore/jars/my_jar.jar /databricks/jars

mySparkListener class:

import org.apache.spark.sql.streaming.StreamingQueryListener

import org.apache.spark.sql.streaming.StreamingQueryListener._

import org.apache.spark.sql.streaming.StreamingQueryProgress

import org.apache.log4j.Logger

import org.joda.time.DateTime

import scala.collection.JavaConverters._

class mySparkListener extends StreamingQueryListener {

 override def onQueryStarted(queryStarted: QueryStartedEvent): Unit = {

   println("Query started: " + queryStarted.id)

 }

 override def onQueryTerminated(queryTerminated: QueryTerminatedEvent): Unit = {

   println("Query terminated: " + queryTerminated.id)

 }

 override def onQueryProgress(queryProgress: QueryProgressEvent): Unit = {

   println("Query made progress: " + queryProgress.progress)

 }

}

val listener = new mySparkListener()

spark.streams.addListener(listener)

 Note: I have already added following configs to the cluster

1. spark.sql.streaming.metricsEnabled true
2. *.sink.servlet.class org.apache.spark.metrics.sink.MetricsServlet
3. *.sink.servlet.path /metrics/json
4. master.sink.servlet.path /metrics/master/json
5. applications.sink.servlet.path /metrics/applications/json

[Kaniz]

Hi @swetha (Customer)​, Please check this S.O thread. It may give you a few insights. Let us know if that helps.

[swetha]

Hi @Kaniz Fatma​ , Thanks for the reply, mine is a spark structured streaming application, I am not able to access via that endpoint, do we have separate API'S to monitor a spark structured streaming application

[jose_gonzalez]

I would like to share the following docs https://docs.databricks.com/structured-streaming/stream-monitoring.html please let us know if it helps or not

[Vidula]

Hi @swetha kadiyala​ 

Hope all is well! Just wanted to check in if you were able to resolve your issue and would you be happy to share the solution or mark an answer as best? Else please let us know if you need more help. 

We'd love to hear from you.

Thanks!