[jira] [Created] (NIFI-5612) org.apache.avro.UnresolvedUnionException: Not in union ["null","int"]: 0

["Colin Dean (JIRA)" <ji...@apache.org>]

Colin Dean created NIFI-5612:
--------------------------------

             Summary: org.apache.avro.UnresolvedUnionException: Not in union ["null","int"]: 0
                 Key: NIFI-5612
                 URL: https://issues.apache.org/jira/browse/NIFI-5612
             Project: Apache NiFi
          Issue Type: Bug
          Components: Core Framework
    Affects Versions: 1.7.1, 1.6.0, 1.5.0
         Environment: Microsoft Windows, MySQL Enterprise 5.0.80
            Reporter: Colin Dean


I'm seeing this when I execute {{SELECT * FROM <tablename>}} on a few tables but not on dozens of others in the same database.

{code}
2018-09-13 01:11:31,434 WARN [Timer-Driven Process Thread-8] o.a.n.controller.tasks.ConnectableTask Administratively Yielding ExecuteSQL[id=cf5c0996-eddf-3e05-25a3-c407c5edf990] due to uncaught Exception: org.apache.avro.file.DataFileWriter$AppendWriteException: org.apache.avro.UnresolvedUnionException: Not in union ["null","int"]: 0
org.apache.avro.file.DataFileWriter$AppendWriteException: org.apache.avro.UnresolvedUnionException: Not in union ["null","int"]: 0
	at org.apache.avro.file.DataFileWriter.append(DataFileWriter.java:308)
	at org.apache.nifi.processors.standard.util.JdbcCommon.convertToAvroStream(JdbcCommon.java:462)
	at org.apache.nifi.processors.standard.ExecuteSQL.lambda$onTrigger$1(ExecuteSQL.java:252)
	at org.apache.nifi.controller.repository.StandardProcessSession.write(StandardProcessSession.java:2625)
	at org.apache.nifi.processors.standard.ExecuteSQL.onTrigger(ExecuteSQL.java:242)
	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:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.avro.UnresolvedUnionException: Not in union ["null","int"]: 0
	at org.apache.avro.generic.GenericData.resolveUnion(GenericData.java:709)
	at org.apache.avro.generic.GenericDatumWriter.resolveUnion(GenericDatumWriter.java:192)
	at org.apache.avro.generic.GenericDatumWriter.writeWithoutConversion(GenericDatumWriter.java:110)
	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.write(GenericDatumWriter.java:60)
	at org.apache.avro.file.DataFileWriter.append(DataFileWriter.java:302)
	... 15 common frames omitted
{code}

I don't know if I can share the database schema – still working with my team on that – but looking at it, I think it has something to do with the signedness of int(1) or tinyint(1) because those two are the only numerical types common to all of the table.



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