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https://issues.apache.org/jira/browse/KAFKA-7698?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias J. Sax reopened KAFKA-7698:
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> Kafka Broker fail to start: ProducerFencedException thrown from
> producerstatemanager.scala!checkProducerEpoch
> --------------------------------------------------------------------------------------------------------------
>
> Key: KAFKA-7698
> URL: https://issues.apache.org/jira/browse/KAFKA-7698
> Project: Kafka
> Issue Type: Bug
> Affects Versions: 2.1.0
> Reporter: Ming Liu
> Priority: Major
> Labels: easyfix
>
> During our operation of Kafka, we frequently saw this failure:
> There was an error in one of the threads during logs loading:
> org.apache.kafka.common.errors.ProducerFencedException:
> {code:java}
> [06:57:09,697] INFO [ProducerStateManager partition=interaction_events-127]
> Loading producer state from snapshot file
> '/data/disk5/kafka/interaction_events-127/00000000092130764817.snapshot'
> (kafka.log.ProducerStateManager)
> [06:57:09,698] INFO [Log partition=interaction_events-127,
> dir=/data/disk5/kafka] Completed load of log with 11 segments, log start
> offset 91975003024 and log end offset 92130764817 in 12701 ms (kafka.log.Log)
> [06:57:09,701] ERROR There was an error in one of the threads during logs
> loading: org.apache.kafka.common.errors.ProducerFencedException: Producer's
> epoch is no longer valid. There is probably another producer with a newer
> epoch. 63 (request epoch), 66 (server epoch) (kafka.log.LogManager)
> [06:57:09,705] INFO [ProducerStateManager
> partition=client_interaction_events_authorid_enrichment-20] Writing producer
> snapshot at offset 92418754384 (kafka.log.ProducerStateManager)
> [06:57:09,707] ERROR [KafkaServer id=2] Fatal error during KafkaServer
> startup. Prepare to shutdown (kafka.server.KafkaServer)
> org.apache.kafka.common.errors.ProducerFencedException: Producer's epoch is
> no longer valid. There is probably another producer with a newer epoch. 63
> (request epoch), 66 (server epoch)
> {code:java}
> {code}
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