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Chris Slotterback closed FLINK-12448. ------------------------------------- Resolution: Duplicate > FlinkKafkaProducer late closure after class loader > -------------------------------------------------- > > Key: FLINK-12448 > URL: https://issues.apache.org/jira/browse/FLINK-12448 > Project: Flink > Issue Type: Bug > Components: Connectors / Kafka > Affects Versions: 1.7.2 > Reporter: Chris Slotterback > Priority: Major > > During job failure/restart, FlinkKafkaProducer configured with > Semantic.EXACTLY_ONCE fails to disconnect properly do to a > NoClassDefFoundError: > {noformat} > java.lang.NoClassDefFoundError: org/apache/kafka/clients/NetworkClient$1 > at > org.apache.kafka.clients.NetworkClient.processDisconnection(NetworkClient.java:658) > at > org.apache.kafka.clients.NetworkClient.handleDisconnections(NetworkClient.java:805) > at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:520) > at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:226) > at org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:163) > at java.lang.Thread.run(Thread.java:748){noformat} > > This begins a restart loop where the job never recovers properly. This is > reproducible only with EXACTLY_ONCE semantic, AT_LEAST_ONCE properly > disconnects and restarts without error. > This issue is described in FLINK-10455, but has been since marked as Fixed, > but still reproducible. > -- This message was sent by Atlassian JIRA (v7.6.3#76005)