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https://issues.apache.org/jira/browse/FLINK-9618?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16517645#comment-16517645
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Aaron Langford commented on FLINK-9618:
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I would be happy to take the work to fix this.
> NullPointerException in FlinkKinesisProducer when aws.region is not set and
> aws.endpoint is set
> -----------------------------------------------------------------------------------------------
>
> Key: FLINK-9618
> URL: https://issues.apache.org/jira/browse/FLINK-9618
> Project: Flink
> Issue Type: Bug
> Components: Kinesis Connector
> Affects Versions: 1.5.0
> Environment: N/A
> Reporter: Aaron Langford
> Priority: Minor
> Original Estimate: 3h
> Remaining Estimate: 3h
>
> This problem arose while trying to write to a local kinesalite instance.
> Specifying the aws.region and the aws.endpoint is not allowed. However when
> the aws.region is not present, a NullPointer exception is thrown.
> Here is some example Scala code:
> {code:java}
> /**
> *
> * @param region the AWS region the stream lives in
> * @param streamName the stream to write records to
> * @param endpoint if in local dev, this points to a kinesalite instance
> * @return
> */
> def getSink(region: String,
> streamName: String,
> endpoint: Option[String]):
> FlinkKinesisProducer[ProcessedMobilePageView] = {
> val props = new Properties()
> props.put(AWSConfigConstants.AWS_CREDENTIALS_PROVIDER, "AUTO")
> endpoint match {
> case Some(uri) => props.put(AWSConfigConstants.AWS_ENDPOINT, uri)
> case None => props.put(AWSConfigConstants.AWS_REGION, region)
> }
> val producer = new FlinkKinesisProducer[ProcessedMobilePageView](
> new JsonSerializer[ProcessedMobilePageView](DefaultSerializationBuilder),
> props
> )
> producer.setDefaultStream(streamName)
> producer
> }
> {code}
> To produce the NullPointerException, pass in `Some("localhost:4567")` for
> endpoint.
> The source of the error is found at
> org.apache.flink.streaming.connectors.kinesis.util.KinesisConfigUtil.java, on
> line 194. This line should perform some kind of check if aws.endpoint is
> present before grabbing it from the Properties object.
>
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