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https://issues.apache.org/jira/browse/NIFI-3832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16003213#comment-16003213
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ASF GitHub Bot commented on NIFI-3832:
--------------------------------------
Github user markap14 commented on the issue:
https://github.com/apache/nifi/pull/1768
@ijokarumawak thanks for the PR, and for catching the bug. Verified that
NiFi was exhibiting the behavior that you described before and that after the
PR the behavior was as-expected. +1 merged to master!
> 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}
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