[jira] [Created] (NIFI-3832) AvroRecordSetWriter initial validation fails with NullPointerException

[Koji Kawamura (JIRA)]

Koji Kawamura created NIFI-3832:
-----------------------------------

             Summary: AvroRecordSetWriter initial validation fails with 
NullPointerException
                 Key: NIFI-3832
                 URL: https://issues.apache.org/jira/browse/NIFI-3832
             Project: Apache NiFi
          Issue Type: Bug
          Components: Extensions
    Affects Versions: 1.2.0
            Reporter: Koji Kawamura
            Priority: Minor


AvroRecordSetWriter overrides default value for SCHEMA_WRITE_STRATEGY to 
AVRO_EMBEDDED. However getRequiredSchemaFields uses SCHEMA_WRITE_STRATEGY 
constant defined in its super class to get value, which has 
SCHAMA_NAME_ATTRIBUTE as its default value.

So, at the initial validation (before user hit apply button), following code go 
through the if statement and results in NPE:

{code}
    @Override
    protected Set<SchemaField> getRequiredSchemaFields(final ValidationContext 
validationContext) {
        final String writeStrategyValue = 
validationContext.getProperty(SCHEMA_WRITE_STRATEGY).getValue();
        if (writeStrategyValue.equalsIgnoreCase(AVRO_EMBEDDED.getValue())) {
            return requiredSchemaFields;
        }

        return super.getRequiredSchemaFields(validationContext);
    }
{code}

Here is the stacktrace:

{code}
2017-05-08 19:19:22,749 ERROR [NiFi Web Server-158] 
o.a.n.c.AbstractConfiguredComponent Failed to perform validation of 
AvroRecordSetWriter[id=e78aac25-015b-1000-f931-33bf517d5e42]
java.lang.NullPointerException: null
        at 
org.apache.nifi.serialization.SchemaRegistryRecordSetWriter.getRequiredSchemaFields(SchemaRegistryRecordSetWriter.java:138)
        at 
org.apache.nifi.avro.AvroRecordSetWriter.getRequiredSchemaFields(AvroRecordSetWriter.java:138)
        at 
org.apache.nifi.serialization.SchemaRegistryRecordSetWriter.customValidate(SchemaRegistryRecordSetWriter.java:147)
        at 
org.apache.nifi.components.AbstractConfigurableComponent.validate(AbstractConfigurableComponent.java:126)
        at 
org.apache.nifi.controller.AbstractConfiguredComponent.getValidationErrors(AbstractConfiguredComponent.java:460)
        at 
org.apache.nifi.controller.service.StandardControllerServiceNode.getValidationErrors(StandardControllerServiceNode.java:506)
        at 
org.apache.nifi.controller.AbstractConfiguredComponent.getValidationErrors(AbstractConfiguredComponent.java:448)
        at 
org.apache.nifi.web.api.dto.DtoFactory.createControllerServiceDto(DtoFactory.java:1381)
        at 
org.apache.nifi.web.StandardNiFiServiceFacade.createControllerServiceEntity(StandardNiFiServiceFacade.java:30
{code}



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