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 <http://r.id>) % partitionFactor
math.abs(h)
}*
again, this happens only on runtime not when I run it from intellij
this so frustrating, any advice ?
