here is a follow up on that Spark exception.If I change the StorageLevel
option to MEMORY_AND_DISK_SER,
JavaReceiverInputDStream packetStream =
ssc.receiverStream(new NiFiReceiver(config,
StorageLevel.MEMORY_AND_DISK_SER()));
I get below exception
16/06/01 12:50:28 ERROR scheduler.ReceiverTracker: Deregistered receiver for
stream 0: Restarting receiver with delay 2000ms: Failed to receive data from
NiFi - java.io.NotSerializableException:
org.apache.nifi.spark.NiFiReceiver$ReceiveRunnable$1
Serialization stack:
- object not serializable (class:
org.apache.nifi.spark.NiFiReceiver$ReceiveRunnable$1, value:
org.apache.nifi.spark.NiFiReceiver$ReceiveRunnable$1@70fb979)
at
org.apache.spark.serializer.SerializationDebugger$.improveException(SerializationDebugger.scala:40)
at
org.apache.spark.serializer.JavaSerializationStream.writeObject(JavaSerializer.scala:47)
at
org.apache.spark.serializer.SerializationStream.writeAll(Serializer.scala:153)
at
org.apache.spark.storage.BlockManager.dataSerializeStream(BlockManager.scala:1189)
at
org.apache.spark.storage.BlockManager.dataSerialize(BlockManager.scala:1198)
at
org.apache.spark.storage.MemoryStore.putArray(MemoryStore.scala:131)
at
org.apache.spark.storage.MemoryStore.putIterator(MemoryStore.scala:168)
at
org.apache.spark.storage.MemoryStore.putIterator(MemoryStore.scala:142)
at
org.apache.spark.storage.BlockManager.doPut(BlockManager.scala:790)
at
org.apache.spark.storage.BlockManager.putIterator(BlockManager.scala:637)
at
org.apache.spark.streaming.receiver.BlockManagerBasedBlockHandler.storeBlock(ReceivedBlockHandler.scala:81)
at
org.apache.spark.streaming.receiver.ReceiverSupervisorImpl.pushAndReportBlock(ReceiverSupervisorImpl.scala:141)
at
org.apache.spark.streaming.receiver.ReceiverSupervisorImpl.pushIterator(ReceiverSupervisorImpl.scala:121)
at
org.apache.spark.streaming.receiver.Receiver.store(Receiver.scala:152)
at
org.apache.nifi.spark.NiFiReceiver$ReceiveRunnable.run(NiFiReceiver.java:182)
at java.lang.Thread.run(Thread.java:745)
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