[jira] [Created] (FLINK-2325) PersistentKafkaSource throws ArrayIndexOutOfBoundsException if reading from a topic that is created after starting the Source

[Shang Yuanchun (Jira)]

Rico Bergmann created FLINK-2325:
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             Summary: PersistentKafkaSource throws ArrayIndexOutOfBoundsException if reading from a topic that is created after starting the Source
                 Key: FLINK-2325
                 URL: https://issues.apache.org/jira/browse/FLINK-2325
             Project: Flink
          Issue Type: Bug
          Components: Kafka Connector
    Affects Versions: 0.9
            Reporter: Rico Bergmann


I'm creating a PersistentKafkaSource reading from a specified topic from Kafka, that is at the time the PersistentKafkaSource is started (via open(.)) not yet present. That's why the number of partitions, that is read in the open(.) function is 0, which leads to arrays of length 0 (lastOffsets and committedOffsets).
May be it is better to check, whether numberOfPartitions returns 0 and if so, to take the default number of partitions from Kafka config?

Stacktrace:
java.lang.ArrayIndexOutOfBoundsException: 0
        at org.apache.flink.streaming.connectors.kafka.api.persistent.PersistentKafkaSource.run(PersistentKafkaSource.java:180)
        at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:49)
        at org.apache.flink.streaming.runtime.tasks.SourceStreamTask.invoke(SourceStreamTask.java:55)
        at org.apache.flink.runtime.taskmanager.Task.run(Task.java:559)
        at java.lang.Thread.run(Thread.java:745)



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