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Re: Could not extract key Exception only on runtime not in dev environment


What r.id  Value ? 
Are you sure that is not null ?

Miki.


On Tue, 20 Nov 2018, 17:26 Avi Levi <avi.levi@xxxxxxxxxxxxxx wrote:
I am running flink locally on my machine , I am getting the exception below when reading from kafka topic. when running from the ide (intellij) it is running perfectly. however when I deploy my jar to flink runtime (locally) using 
/bin/flink run ~MyApp-1.0-SNAPSHOT.jar
my class looks like this 
case class Foo(id: String, value: String, timestamp: Long, counter: Int) 
I am getting this exception 
java.lang.RuntimeException: Could not extract key from Foo("some-uuid","text",1540348398,1)
	at org.apache.flink.streaming.runtime.io.RecordWriterOutput.pushToRecordWriter(RecordWriterOutput.java:110)
	at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:89)
	at org.apache.flink.streaming.runtime.io.RecordWriterOutput.collect(RecordWriterOutput.java:45)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:689)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:667)
	at org.apache.flink.streaming.api.operators.StreamFilter.processElement(StreamFilter.java:40)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.pushToOperator(OperatorChain.java:579)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:554)
	at org.apache.flink.streaming.runtime.tasks.OperatorChain$CopyingChainingOutput.collect(OperatorChain.java:534)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:689)
	at org.apache.flink.streaming.api.operators.AbstractStreamOperator$CountingOutput.collect(AbstractStreamOperator.java:667)
	at org.apache.flink.streaming.api.operators.StreamSourceContexts$NonTimestampContext.collect(StreamSourceContexts.java:104)
	at org.apache.flink.streaming.api.operators.StreamSourceContexts$NonTimestampContext.collectWithTimestamp(StreamSourceContexts.java:111)
	at org.apache.flink.streaming.connectors.kafka.internals.AbstractFetcher.emitRecordWithTimestamp(AbstractFetcher.java:398)
	at org.apache.flink.streaming.connectors.kafka.internal.Kafka010Fetcher.emitRecord(Kafka010Fetcher.java:89)
	at org.apache.flink.streaming.connectors.kafka.internal.Kafka09Fetcher.runFetchLoop(Kafka09Fetcher.java:154)
	at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.run(FlinkKafkaConsumerBase.java:738)
	at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:87)
	at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:56)
	at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.run(SourceStreamTask.java:99)
	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:300)
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:711)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.RuntimeException: Could not extract key from Foo("some-uuid","text",1540348398,1)
	at org.apache.flink.streaming.runtime.partitioner.KeyGroupStreamPartitioner.selectChannels(KeyGroupStreamPartitioner.java:61)
	at org.apache.flink.streaming.runtime.partitioner.KeyGroupStreamPartitioner.selectChannels(KeyGroupStreamPartitioner.java:32)
	at org.apache.flink.runtime.io.network.api.writer.RecordWriter.emit(RecordWriter.java:106)
	at org.apache.flink.streaming.runtime.io.StreamRecordWriter.emit(StreamRecordWriter.java:81)
	at org.apache.flink.streaming.runtime.io.RecordWriterOutput.pushToRecordWriter(RecordWriterOutput.java:107)
	... 22 more
Caused by: java.lang.NullPointerException
	at com.bluevoyant.StreamingJob$$anonfun$3.apply(StreamingJob.scala:41)
	at com.bluevoyant.StreamingJob$$anonfun$3.apply(StreamingJob.scala:40)
	at org.apache.flink.streaming.api.scala.DataStream$$anon$2.getKey(DataStream.scala:411)
	at org.apache.flink.streaming.runtime.partitioner.KeyGroupStreamPartitioner.selectChannels(KeyGroupStreamPartitioner.java:59)
	... 26 more

my key partition is simple (partitionFactor = some number) 
.keyBy{ r =>
        val h = fastHash(r.id) % partitionFactor
        math.abs(h)
    }
again, this happens only on runtime not when I run it from intellij 
this so frustrating, any advice ?