[ https://issues.apache.org/jira/browse/FLINK-3067?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Robert Metzger resolved FLINK-3067. ----------------------------------- Resolution: Fixed Fix Version/s: 1.0.0 0.10.2 Merged fix for 0.10.2 (or maybe .1) in http://git-wip-us.apache.org/repos/asf/flink/commit/0b6adc4c merged for master 1.0.0 in http://git-wip-us.apache.org/repos/asf/flink/commit/2c507f93 > Kafka source fails during checkpoint notifications with NPE > ----------------------------------------------------------- > > Key: FLINK-3067 > URL: https://issues.apache.org/jira/browse/FLINK-3067 > Project: Flink > Issue Type: Bug > Components: Kafka Connector > Affects Versions: 0.10.0 > Reporter: Gyula Fora > Assignee: Robert Metzger > Fix For: 0.10.2, 1.0.0 > > > While running a job with many kafka sources I experienced the following error > during the checkpoint notifications: > 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 > This resulted in the job crashing and getting stuck during cancelling which > subsequently lead to having to restart the cluster. > This might be a zookeeper issue but we should be able to handle it (catch the > exception maybe). -- This message was sent by Atlassian JIRA (v6.3.4#6332)