Github user YolandaMDavis commented on the issue:
https://github.com/apache/nifi/pull/1938
@markap14 Iâm not quite sure if I ran into a configuration problem on my
part or if this is truly an issue. Iâm testing the ConfluentSchemaRegistry
and do have it set up in NiFi with two small flows that places data onto a
kafka topic and reads from that same topic then saves data into the filesystem.
I did confirm that the Controller Service itself appears to work since I was
able to register a schema and get an AvroReader/RecordSetWriter and a
JsonTreeReader to refer to the schema within that registry. However when I
wanted to use the option to write the Schema using the Confluent Schema
Registry Reference (specifically within the AvroRecordSetWriter in my test)
Iâm getting a NullPointerException:
`2017-07-06 05:48:35,364 ERROR [Timer-Driven Process Thread-8]
o.a.n.p.k.pubsub.PublishKafkaRecord_0_10
PublishKafkaRecord_0_10[id=16230624-015d-1000-7474-292c6c453e5a] Failed to send
all message for
StandardFlowFileRecord[uuid=007abeb3-5d2e-4c11-b9ef-e279b7822348,claim=StandardContentClaim
[resourceClaim=StandardResourceClaim[id=149931562458
4-1, container=default, section=1], offset=683586,
length=20],offset=0,name=11741764036465,size=20] to Kafka; routing to failure
due to java.lang.NullPointerException: {}
java.lang.NullPointerException: null
at
org.apache.nifi.serialization.SchemaRegistryRecordSetWriter.getSchemaAccessWriter(SchemaRegistryRecordSetWriter.java:136)
at
org.apache.nifi.avro.AvroRecordSetWriter.createWriter(AvroRecordSetWriter.java:107)
at sun.reflect.GeneratedMethodAccessor374.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at
org.apache.nifi.controller.service.StandardControllerServiceInvocationHandler.invoke(StandardControllerServiceInvocationHandler.java:89)
at com.sun.proxy.$Proxy131.createWriter(Unknown Source)
at
org.apache.nifi.processors.kafka.pubsub.PublisherLease.publish(PublisherLease.java:109)
at
org.apache.nifi.processors.kafka.pubsub.PublishKafkaRecord_0_10$1.process(PublishKafkaRecord_0_10.java:338)
at
org.apache.nifi.controller.repository.StandardProcessSession.read(StandardProcessSession.java:2136)
at
org.apache.nifi.controller.repository.StandardProcessSession.read(StandardProcessSession.java:2106)
at
org.apache.nifi.processors.kafka.pubsub.PublishKafkaRecord_0_10.onTrigger(PublishKafkaRecord_0_10.java:330)
at
org.apache.nifi.processor.AbstractProcessor.onTrigger(AbstractProcessor.java:27)
at
org.apache.nifi.controller.StandardProcessorNode.onTrigger(StandardProcessorNode.java:1120)
at
org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:147)
at
org.apache.nifi.controller.tasks.ContinuallyRunProcessorTask.call(ContinuallyRunProcessorTask.java:47)
at
org.apache.nifi.controller.scheduling.TimerDrivenSchedulingAgent$1.run(TimerDrivenSchedulingAgent.java:132)
at
java.util.concurrent.Executors$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)`
I did see a note about potentially experiencing an exception if the schema
didnât include the identifier and version however I wasnât quite expecting
the exception to be a Nullpointer. Is this expected behavior? I did confirm
that if I used another option (e.g. Set schema.name or Do Not Write Schema)
that I did not encounter this problem.
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