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ASF GitHub Bot commented on NIFI-3832: -------------------------------------- Github user asfgit closed the pull request at: https://github.com/apache/nifi/pull/1768 > 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 > Assignee: 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} -- This message was sent by Atlassian JIRA (v6.3.15#6346)