2018-10-20 16:26:07,091 ERROR [Timer-Driven Process Thread-3] o.a.n.processors.standard.ValidateRecord ValidateRecord[id=01651155-d17b-1b8a-56a7-d4dc64b64499] Failed to process StandardFlowFileRecord[uuid=9b7e7b3b-286a-4f91-b6f1-da3ca355ffcd,claim=StandardContentClaim [resourceClaim=StandardResourceClaim[id=1540052765488-169441, container=default, section=481], offset=277006, length=345],offset=0,name=2513241609759835,size=345]; will route to failure: org.apache.avro.file.DataFileWriter$AppendWriteException: java.lang.NullPointerException: null of string in field f1 of left of union of array in field children of root
org.apache.avro.file.DataFileWriter$AppendWriteException: java.lang.NullPointerException: null of string in field f1 of left of union of array in field children of root
	at org.apache.avro.file.DataFileWriter.append(DataFileWriter.java:308)
	at org.apache.nifi.avro.WriteAvroResultWithSchema.writeRecord(WriteAvroResultWithSchema.java:61)
	at org.apache.nifi.serialization.AbstractRecordSetWriter.write(AbstractRecordSetWriter.java:59)
	at org.apache.nifi.processors.standard.ValidateRecord.onTrigger(ValidateRecord.java:344)
	at org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
	at org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1165)
	at org.apache.nifi.controller.tasks.ConnectableTask.invoke(ConnectableTask.java:203)
	at org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:117)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException: null of string in field f1 of left of union of array in field children of root
	at org.apache.avro.generic.GenericDatumWriter.npe(GenericDatumWriter.java:132)
	at org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:126)
	at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:73)
	at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:60)
	at org.apache.avro.file.DataFileWriter.append(DataFileWriter.java:302)
	... 14 common frames omitted
Caused by: java.lang.NullPointerException: null
	at org.apache.avro.io.Encoder.writeString(Encoder.java:121)
	at org.apache.avro.generic.GenericDatumWriter.writeString(GenericDatumWriter.java:254)
	at org.apache.avro.generic.GenericDatumWriter.writeString(GenericDatumWriter.java:249)
	at org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:115)
	at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:73)
	at org.apache.avro.generic.GenericDatumWriter.writeField(GenericDatumWriter.java:153)
	at org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:143)
	at org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:105)
	at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:73)
	at org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:112)
	at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:73)
	at org.apache.avro.generic.GenericDatumWriter.writeArray(GenericDatumWriter.java:179)
	at org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:107)
	at org.apache.avro.generic.GenericDatumWriter.write(GenericDatumWriter.java:73)
	at org.apache.avro.generic.GenericDatumWriter.writeField(GenericDatumWriter.java:153)
	at org.apache.avro.generic.GenericDatumWriter.writeRecord(GenericDatumWriter.java:143)
	at org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:105)
	... 17 common frames omitted