[jira] [Commented] (FLINK-8497) KafkaConsumer throws NPE if topic doesn't exist

["Zhenqiu Huang (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-8497?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17008533#comment-17008533 ] 

Zhenqiu Huang commented on FLINK-8497:
--------------------------------------


[~tzulitai]
It is obviously a null point exception thrown within Kafka consumer right? We met the same issue when the bootstrap server list has a zombie broker.

> KafkaConsumer throws NPE if topic doesn't exist
> -----------------------------------------------
>
>                 Key: FLINK-8497
>                 URL: https://issues.apache.org/jira/browse/FLINK-8497
>             Project: Flink
>          Issue Type: Bug
>          Components: Connectors / Kafka
>    Affects Versions: 1.4.0
>            Reporter: chris snow
>            Assignee: Aleksei Lesnov
>            Priority: Minor
>              Labels: pull-request-available
>
> If I accidentally set the kafka consumer with a topic that doesn't exist:
> {code:java}
> FlinkKafkaConsumer011 kafkaConsumer = new FlinkKafkaConsumer011(
>    "does_not_exist",
>     new JSONKeyValueDeserializationSchema(false),
>     properties
>     );
> DataStream<String> input = env.addSource(kafkaConsumer);{code}
> Flink throws NPE
> {code:java}
> Caused by: java.lang.NullPointerException
> at org.apache.flink.streaming.connectors.kafka.internal.Kafka09PartitionDiscoverer.getAllPartitionsForTopics(Kafka09PartitionDiscoverer.java:75)
> at org.apache.flink.streaming.connectors.kafka.internals.AbstractPartitionDiscoverer.discoverPartitions(AbstractPartitionDiscoverer.java:128)
> at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumerBase.open(FlinkKafkaConsumerBase.java:415)
> at org.apache.flink.api.common.functions.util.FunctionUtils.openFunction(FunctionUtils.java:36)
> at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.open(AbstractUdfStreamOperator.java:102)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.openAllOperators(StreamTask.java:393)
> at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:254)
> at org.apache.flink.runtime.taskmanager.Task.run(Task.java:718)
> at java.lang.Thread.run(Thread.java:748){code}
> Maybe Flink could through an IllegalStateException("Topic not found")?



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