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https://issues.apache.org/jira/browse/FLINK-3025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15024059#comment-15024059
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Gyula Fora commented on FLINK-3025:
-----------------------------------
I am still getting the same issue after running into this exception:
java.lang.RuntimeException: Error while confirming checkpoint
at org.apache.flink.runtime.taskmanager.Task$2.run(Task.java:935)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
at org.I0Itec.zkclient.ZkConnection.writeDataReturnStat(ZkConnection.java:115)
at org.I0Itec.zkclient.ZkClient$10.call(ZkClient.java:817)
at org.I0Itec.zkclient.ZkClient.retryUntilConnected(ZkClient.java:675)
at org.I0Itec.zkclient.ZkClient.writeDataReturnStat(ZkClient.java:813)
at org.I0Itec.zkclient.ZkClient.writeData(ZkClient.java:808)
at org.I0Itec.zkclient.ZkClient.writeData(ZkClient.java:777)
at kafka.utils.ZkUtils$.updatePersistentPath(ZkUtils.scala:332)
at kafka.utils.ZkUtils.updatePersistentPath(ZkUtils.scala)
at
org.apache.flink.streaming.connectors.kafka.internals.ZookeeperOffsetHandler.setOffsetInZooKeeper(ZookeeperOffsetHandler.java:112)
at
org.apache.flink.streaming.connectors.kafka.internals.ZookeeperOffsetHandler.commit(ZookeeperOffsetHandler.java:80)
at
org.apache.flink.streaming.connectors.kafka.FlinkKafkaConsumer.notifyCheckpointComplete(FlinkKafkaConsumer.java:563)
at
org.apache.flink.streaming.api.operators.AbstractUdfStreamOperator.notifyOfCompletedCheckpoint(AbstractUdfStreamOperator.java:176)
at
org.apache.flink.streaming.runtime.tasks.StreamTask.notifyCheckpointComplete(StreamTask.java:478)
at org.apache.flink.runtime.taskmanager.Task$2.run(Task.java:931)
... 5 more
06:23:28,373 INFO org.apache.flink.runtime.executiongraph.ExecutionGraph -
Source: Kafka[event.rakdos.log] (1/1) (d79e6b7a25b1ac307d2e0c8
> Flink Kafka consumer may get stuck due to Kafka/Zookeeper client bug
> --------------------------------------------------------------------
>
> Key: FLINK-3025
> URL: https://issues.apache.org/jira/browse/FLINK-3025
> Project: Flink
> Issue Type: Bug
> Components: Streaming Connectors
> Affects Versions: 0.10.0, 1.0.0
> Reporter: Gyula Fora
> Assignee: Stephan Ewen
> Priority: Critical
> Fix For: 1.0.0, 0.10.1
>
>
> In some cases the Flink kafka consumer might fail due to
> https://issues.apache.org/jira/browse/KAFKA-824.
> Subsequently it can happen that the sources gets stuck in a Zookeeper client
> call (zookeeper bug).
> A proposed fix would be bumping the zookeeper dependency to a version that
> includes the fix for this bug.
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