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Posted to dev@spark.apache.org by Renyi Xiong <re...@gmail.com> on 2015/12/09 21:45:45 UTC
DStream not initialized SparkException
hi,
I met following exception when the driver program tried to recover from
checkpoint, looks like the logic relies on zeroTime being set which doesn't
seem to happen here. am I missing anything or is it a bug in 1.4.1?
org.apache.spark.SparkException:
org.apache.spark.streaming.api.csharp.CSharpTransformed2DStream@161f0d27
has not been initialized
at
org.apache.spark.streaming.dstream.DStream.isTimeValid(DStream.scala:321)
at
org.apache.spark.streaming.dstream.DStream$$anonfun$getOrCompute$1.apply(DStream.scala:342)
at
org.apache.spark.streaming.dstream.DStream$$anonfun$getOrCompute$1.apply(DStream.scala:342)
at scala.Option.orElse(Option.scala:257)
at
org.apache.spark.streaming.dstream.DStream.getOrCompute(DStream.scala:339)
at
org.apache.spark.streaming.dstream.ForEachDStream.generateJob(ForEachDStream.scala:38)
at
org.apache.spark.streaming.DStreamGraph$$anonfun$1.apply(DStreamGraph.scala:120)
at
org.apache.spark.streaming.DStreamGraph$$anonfun$1.apply(DStreamGraph.scala:120)
at
scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
at
scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
at
scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
at
scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
at
scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:251)
at
scala.collection.AbstractTraversable.flatMap(Traversable.scala:105)
at
org.apache.spark.streaming.DStreamGraph.generateJobs(DStreamGraph.scala:120)
at
org.apache.spark.streaming.scheduler.JobGenerator$$anonfun$restart$4.apply(JobGenerator.scala:227)
at
org.apache.spark.streaming.scheduler.JobGenerator$$anonfun$restart$4.apply(JobGenerator.scala:222)
at
scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at
scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:108)
at
org.apache.spark.streaming.scheduler.JobGenerator.restart(JobGenerator.scala:222)
at
org.apache.spark.streaming.scheduler.JobGenerator.start(JobGenerator.scala:92)
at
org.apache.spark.streaming.scheduler.JobScheduler.start(JobScheduler.scala:73)
at
org.apache.spark.streaming.StreamingContext.liftedTree1$1(StreamingContext.scala:596)
at
org.apache.spark.streaming.StreamingContext.start(StreamingContext.scala:594)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at
org.apache.spark.api.csharp.CSharpBackendHandler.handleMethodCall(CSharpBackendHandler.scala:145)
at
org.apache.spark.api.csharp.CSharpBackendHandler.channelRead0(CSharpBackendHandler.scala:90)
at
org.apache.spark.api.csharp.CSharpBackendHandler.channelRead0(CSharpBackendHandler.scala:25)
at
io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
at
io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
at
io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:163)
at
io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
at
io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
at
io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:787)
at
io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:130)
at
io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
at
io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
at
io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
at
io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
at java.lang.Thread.run(Thread.java:724)
Re: DStream not initialized SparkException
Posted by Renyi Xiong <re...@gmail.com>.
never mind, one of my peers correct the driver program for me - all dstream
operations need to be within the scope of getOrCreate API
On Wed, Dec 9, 2015 at 3:32 PM, Renyi Xiong <re...@gmail.com> wrote:
> following scala program throws same exception, I know people are running
> streaming jobs against kafka, I must be missing something. any idea why?
>
> package org.apache.spark.streaming.api.csharp
>
> import java.util.HashMap
>
> import kafka.serializer.{DefaultDecoder, Decoder, StringDecoder}
>
> import org.apache.spark.streaming._
> import org.apache.spark.streaming.kafka._
> import org.apache.spark.SparkConf
>
> object ScalaSML {
> def main(args: Array[String]) {
>
> val checkpointPath =
> "hdfs://SparkMasterVIP.AdsOISCP-Sandbox-Ch1d.CH1D.ap.gbl/checkpoint/ScalaSML/HK2"
> val sparkConf = new SparkConf().setAppName("ScalaSML")
> val ssc = StreamingContext.getOrCreate(checkpointPath, () => {
> val context = new StreamingContext(sparkConf, Seconds(60))
> context.checkpoint(checkpointPath)
> context
> })
>
> val kafkaParams = Map("metadata.broker.list" -> "...",
> "auto.offset.reset" -> "largest")
>
> val topics = Set("topic")
>
> val ds = KafkaUtils.createDirectStream[Array[Byte], Array[Byte],
> DefaultDecoder, DefaultDecoder](ssc, kafkaParams, topics)
> ds.foreachRDD((rdd, time) => println("Time: " + time + " Count: " +
> rdd.count()))
>
> ssc.start()
> ssc.awaitTermination()
> }
> }
>
> 15/12/09 15:22:43 ERROR StreamingContext: Error starting the context,
> marking it as stopped
> org.apache.spark.SparkException:
> org.apache.spark.streaming.kafka.DirectKafkaInputDStream@15ce2c0 has not
> been initialized
> at
> org.apache.spark.streaming.dstream.DStream.isTimeValid(DStream.scala:321)
> at
> org.apache.spark.streaming.dstream.InputDStream.isTimeValid(InputDStream.scala:83)
> at
> org.apache.spark.streaming.dstream.DStream$$anonfun$getOrCompute$1.apply(DStream.scala:342)
> at
> org.apache.spark.streaming.dstream.DStream$$anonfun$getOrCompute$1.apply(DStream.scala:342)
> at scala.Option.orElse(Option.scala:257)
> at
> org.apache.spark.streaming.dstream.DStream.getOrCompute(DStream.scala:339)
> at
> org.apache.spark.streaming.dstream.ForEachDStream.generateJob(ForEachDStream.scala:38)
> at
> org.apache.spark.streaming.DStreamGraph$$anonfun$1.apply(DStreamGraph.scala:120)
> at
> org.apache.spark.streaming.DStreamGraph$$anonfun$1.apply(DStreamGraph.scala:120)
> at
> scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
> at
> scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
> at
> scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
> at
> scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
> at
> scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:251)
> at
> scala.collection.AbstractTraversable.flatMap(Traversable.scala:105)
> at
> org.apache.spark.streaming.DStreamGraph.generateJobs(DStreamGraph.scala:120)
> at
> org.apache.spark.streaming.scheduler.JobGenerator$$anonfun$restart$4.apply(JobGenerator.scala:227)
> at
> org.apache.spark.streaming.scheduler.JobGenerator$$anonfun$restart$4.apply(JobGenerator.scala:222)
> at
> scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
> at
> scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:108)
> at
> org.apache.spark.streaming.scheduler.JobGenerator.restart(JobGenerator.scala:222)
> at
> org.apache.spark.streaming.scheduler.JobGenerator.start(JobGenerator.scala:92)
> at
> org.apache.spark.streaming.scheduler.JobScheduler.start(JobScheduler.scala:73)
> at
> org.apache.spark.streaming.StreamingContext.liftedTree1$1(StreamingContext.scala:593)
> at
> org.apache.spark.streaming.StreamingContext.start(StreamingContext.scala:591)
> at
> org.apache.spark.streaming.api.csharp.ScalaSML$.main(ScalaSML.scala:48)
> at
> org.apache.spark.streaming.api.csharp.ScalaSML.main(ScalaSML.scala)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at
> org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:665)
> at
> org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:170)
> at
> org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:193)
> at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:112)
> at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
>
> On Wed, Dec 9, 2015 at 12:45 PM, Renyi Xiong <re...@gmail.com>
> wrote:
>
>> hi,
>>
>> I met following exception when the driver program tried to recover from
>> checkpoint, looks like the logic relies on zeroTime being set which doesn't
>> seem to happen here. am I missing anything or is it a bug in 1.4.1?
>>
>> org.apache.spark.SparkException:
>> org.apache.spark.streaming.api.csharp.CSharpTransformed2DStream@161f0d27
>> has not been initialized
>> at
>> org.apache.spark.streaming.dstream.DStream.isTimeValid(DStream.scala:321)
>> at
>> org.apache.spark.streaming.dstream.DStream$$anonfun$getOrCompute$1.apply(DStream.scala:342)
>> at
>> org.apache.spark.streaming.dstream.DStream$$anonfun$getOrCompute$1.apply(DStream.scala:342)
>> at scala.Option.orElse(Option.scala:257)
>> at
>> org.apache.spark.streaming.dstream.DStream.getOrCompute(DStream.scala:339)
>> at
>> org.apache.spark.streaming.dstream.ForEachDStream.generateJob(ForEachDStream.scala:38)
>> at
>> org.apache.spark.streaming.DStreamGraph$$anonfun$1.apply(DStreamGraph.scala:120)
>> at
>> org.apache.spark.streaming.DStreamGraph$$anonfun$1.apply(DStreamGraph.scala:120)
>> at
>> scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
>> at
>> scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
>> at
>> scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
>> at
>> scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
>> at
>> scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:251)
>> at
>> scala.collection.AbstractTraversable.flatMap(Traversable.scala:105)
>> at
>> org.apache.spark.streaming.DStreamGraph.generateJobs(DStreamGraph.scala:120)
>> at
>> org.apache.spark.streaming.scheduler.JobGenerator$$anonfun$restart$4.apply(JobGenerator.scala:227)
>> at
>> org.apache.spark.streaming.scheduler.JobGenerator$$anonfun$restart$4.apply(JobGenerator.scala:222)
>> at
>> scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
>> at
>> scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:108)
>> at
>> org.apache.spark.streaming.scheduler.JobGenerator.restart(JobGenerator.scala:222)
>> at
>> org.apache.spark.streaming.scheduler.JobGenerator.start(JobGenerator.scala:92)
>> at
>> org.apache.spark.streaming.scheduler.JobScheduler.start(JobScheduler.scala:73)
>> at
>> org.apache.spark.streaming.StreamingContext.liftedTree1$1(StreamingContext.scala:596)
>> at
>> org.apache.spark.streaming.StreamingContext.start(StreamingContext.scala:594)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
>> at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> at java.lang.reflect.Method.invoke(Method.java:606)
>> at
>> org.apache.spark.api.csharp.CSharpBackendHandler.handleMethodCall(CSharpBackendHandler.scala:145)
>> at
>> org.apache.spark.api.csharp.CSharpBackendHandler.channelRead0(CSharpBackendHandler.scala:90)
>> at
>> org.apache.spark.api.csharp.CSharpBackendHandler.channelRead0(CSharpBackendHandler.scala:25)
>> at
>> io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
>> at
>> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
>> at
>> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
>> at
>> io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
>> at
>> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
>> at
>> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
>> at
>> io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:163)
>> at
>> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
>> at
>> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
>> at
>> io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:787)
>> at
>> io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:130)
>> at
>> io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
>> at
>> io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
>> at
>> io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
>> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
>> at
>> io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
>> at
>> io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
>> at java.lang.Thread.run(Thread.java:724)
>>
>
>
Re: DStream not initialized SparkException
Posted by Renyi Xiong <re...@gmail.com>.
following scala program throws same exception, I know people are running
streaming jobs against kafka, I must be missing something. any idea why?
package org.apache.spark.streaming.api.csharp
import java.util.HashMap
import kafka.serializer.{DefaultDecoder, Decoder, StringDecoder}
import org.apache.spark.streaming._
import org.apache.spark.streaming.kafka._
import org.apache.spark.SparkConf
object ScalaSML {
def main(args: Array[String]) {
val checkpointPath =
"hdfs://SparkMasterVIP.AdsOISCP-Sandbox-Ch1d.CH1D.ap.gbl/checkpoint/ScalaSML/HK2"
val sparkConf = new SparkConf().setAppName("ScalaSML")
val ssc = StreamingContext.getOrCreate(checkpointPath, () => {
val context = new StreamingContext(sparkConf, Seconds(60))
context.checkpoint(checkpointPath)
context
})
val kafkaParams = Map("metadata.broker.list" -> "...",
"auto.offset.reset" -> "largest")
val topics = Set("topic")
val ds = KafkaUtils.createDirectStream[Array[Byte], Array[Byte],
DefaultDecoder, DefaultDecoder](ssc, kafkaParams, topics)
ds.foreachRDD((rdd, time) => println("Time: " + time + " Count: " +
rdd.count()))
ssc.start()
ssc.awaitTermination()
}
}
15/12/09 15:22:43 ERROR StreamingContext: Error starting the context,
marking it as stopped
org.apache.spark.SparkException:
org.apache.spark.streaming.kafka.DirectKafkaInputDStream@15ce2c0 has not
been initialized
at
org.apache.spark.streaming.dstream.DStream.isTimeValid(DStream.scala:321)
at
org.apache.spark.streaming.dstream.InputDStream.isTimeValid(InputDStream.scala:83)
at
org.apache.spark.streaming.dstream.DStream$$anonfun$getOrCompute$1.apply(DStream.scala:342)
at
org.apache.spark.streaming.dstream.DStream$$anonfun$getOrCompute$1.apply(DStream.scala:342)
at scala.Option.orElse(Option.scala:257)
at
org.apache.spark.streaming.dstream.DStream.getOrCompute(DStream.scala:339)
at
org.apache.spark.streaming.dstream.ForEachDStream.generateJob(ForEachDStream.scala:38)
at
org.apache.spark.streaming.DStreamGraph$$anonfun$1.apply(DStreamGraph.scala:120)
at
org.apache.spark.streaming.DStreamGraph$$anonfun$1.apply(DStreamGraph.scala:120)
at
scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
at
scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
at
scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
at
scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
at
scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:251)
at
scala.collection.AbstractTraversable.flatMap(Traversable.scala:105)
at
org.apache.spark.streaming.DStreamGraph.generateJobs(DStreamGraph.scala:120)
at
org.apache.spark.streaming.scheduler.JobGenerator$$anonfun$restart$4.apply(JobGenerator.scala:227)
at
org.apache.spark.streaming.scheduler.JobGenerator$$anonfun$restart$4.apply(JobGenerator.scala:222)
at
scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at
scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:108)
at
org.apache.spark.streaming.scheduler.JobGenerator.restart(JobGenerator.scala:222)
at
org.apache.spark.streaming.scheduler.JobGenerator.start(JobGenerator.scala:92)
at
org.apache.spark.streaming.scheduler.JobScheduler.start(JobScheduler.scala:73)
at
org.apache.spark.streaming.StreamingContext.liftedTree1$1(StreamingContext.scala:593)
at
org.apache.spark.streaming.StreamingContext.start(StreamingContext.scala:591)
at
org.apache.spark.streaming.api.csharp.ScalaSML$.main(ScalaSML.scala:48)
at
org.apache.spark.streaming.api.csharp.ScalaSML.main(ScalaSML.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at
org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:665)
at
org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:170)
at
org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:193)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:112)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
On Wed, Dec 9, 2015 at 12:45 PM, Renyi Xiong <re...@gmail.com> wrote:
> hi,
>
> I met following exception when the driver program tried to recover from
> checkpoint, looks like the logic relies on zeroTime being set which doesn't
> seem to happen here. am I missing anything or is it a bug in 1.4.1?
>
> org.apache.spark.SparkException:
> org.apache.spark.streaming.api.csharp.CSharpTransformed2DStream@161f0d27
> has not been initialized
> at
> org.apache.spark.streaming.dstream.DStream.isTimeValid(DStream.scala:321)
> at
> org.apache.spark.streaming.dstream.DStream$$anonfun$getOrCompute$1.apply(DStream.scala:342)
> at
> org.apache.spark.streaming.dstream.DStream$$anonfun$getOrCompute$1.apply(DStream.scala:342)
> at scala.Option.orElse(Option.scala:257)
> at
> org.apache.spark.streaming.dstream.DStream.getOrCompute(DStream.scala:339)
> at
> org.apache.spark.streaming.dstream.ForEachDStream.generateJob(ForEachDStream.scala:38)
> at
> org.apache.spark.streaming.DStreamGraph$$anonfun$1.apply(DStreamGraph.scala:120)
> at
> org.apache.spark.streaming.DStreamGraph$$anonfun$1.apply(DStreamGraph.scala:120)
> at
> scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
> at
> scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251)
> at
> scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
> at
> scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
> at
> scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:251)
> at
> scala.collection.AbstractTraversable.flatMap(Traversable.scala:105)
> at
> org.apache.spark.streaming.DStreamGraph.generateJobs(DStreamGraph.scala:120)
> at
> org.apache.spark.streaming.scheduler.JobGenerator$$anonfun$restart$4.apply(JobGenerator.scala:227)
> at
> org.apache.spark.streaming.scheduler.JobGenerator$$anonfun$restart$4.apply(JobGenerator.scala:222)
> at
> scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
> at
> scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:108)
> at
> org.apache.spark.streaming.scheduler.JobGenerator.restart(JobGenerator.scala:222)
> at
> org.apache.spark.streaming.scheduler.JobGenerator.start(JobGenerator.scala:92)
> at
> org.apache.spark.streaming.scheduler.JobScheduler.start(JobScheduler.scala:73)
> at
> org.apache.spark.streaming.StreamingContext.liftedTree1$1(StreamingContext.scala:596)
> at
> org.apache.spark.streaming.StreamingContext.start(StreamingContext.scala:594)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:606)
> at
> org.apache.spark.api.csharp.CSharpBackendHandler.handleMethodCall(CSharpBackendHandler.scala:145)
> at
> org.apache.spark.api.csharp.CSharpBackendHandler.channelRead0(CSharpBackendHandler.scala:90)
> at
> org.apache.spark.api.csharp.CSharpBackendHandler.channelRead0(CSharpBackendHandler.scala:25)
> at
> io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
> at
> io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
> at
> io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:163)
> at
> io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
> at
> io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:787)
> at
> io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:130)
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
> at
> io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
> at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
> at
> io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
> at
> io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137)
> at java.lang.Thread.run(Thread.java:724)
>