Till Rohrmann created FLINK-3156:
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Summary: 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
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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