[jira] [Resolved] (FLINK-3156) FlinkKafkaConsumer fails with NPE on notifyCheckpointComplete

["Robert Metzger (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-3156?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Metzger resolved FLINK-3156.
-----------------------------------
       Resolution: Fixed
    Fix Version/s: 1.0.0

Fixed for 1.0 in http://git-wip-us.apache.org/repos/asf/flink/commit/c4a2d60c

> FlinkKafkaConsumer fails with NPE on notifyCheckpointComplete
> -------------------------------------------------------------
>
>                 Key: FLINK-3156
>                 URL: https://issues.apache.org/jira/browse/FLINK-3156
>             Project: Flink
>          Issue Type: Bug
>          Components: Kafka Connector
>    Affects Versions: 1.0.0
>            Reporter: Till Rohrmann
>            Assignee: Robert Metzger
>             Fix For: 1.0.0
>
>
> The {{FlinkKafkaConsumer}} fails with a {{NullPointerException}} when a checkpoint was completed. The stack trace is
> {code}
>  java.lang.RuntimeException: Error while confirming checkpoint
>     at org.apache.flink.runtime.taskmanager.Task$2.run(Task.java:908)
>     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
>     at java.util.concurrent.FutureTask.run(FutureTask.java:262)
>     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>     at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.NullPointerException
>     at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer.commitOffsets(FlinkKafkaConsumer.java:664)
>     at org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer.notifyCheckpointComplete(FlinkKafkaConsumer.java:578)
>     at org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.notifyOfCompletedCheckpoint(AbstractUdfStreamOperator.java:176)
>     at org.apache.flink.streaming.runtime.tasks.StreamTask.notifyCheckpointComplete(StreamTask.java:546)
>     at org.apache.flink.runtime.taskmanager.Task$2.run(Task.java:904)
>     ... 5 more
> {code}
> Apparently, one of the {{KafkaTopicPartitionLeaders}} from the {{subscribedPartitions}} was {{null}}.



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