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Posted to issues@flink.apache.org by "Piotr Nowojski (JIRA)" <ji...@apache.org> on 2018/05/22 11:56:00 UTC
[jira] [Reopened] (FLINK-9295) FlinkKafkaProducer011 sometimes
throws ProducerFencedExceptions when in EXACTLY_ONCE mode
[ https://issues.apache.org/jira/browse/FLINK-9295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Piotr Nowojski reopened FLINK-9295:
-----------------------------------
> FlinkKafkaProducer011 sometimes throws ProducerFencedExceptions when in EXACTLY_ONCE mode
> -----------------------------------------------------------------------------------------
>
> Key: FLINK-9295
> URL: https://issues.apache.org/jira/browse/FLINK-9295
> Project: Flink
> Issue Type: Bug
> Components: Kafka Connector
> Affects Versions: 1.4.2
> Reporter: Christopher Ng
> Assignee: Piotr Nowojski
> Priority: Major
> Fix For: 1.6.0, 1.5.1
>
>
> {{FlinkKafkaProducer011}} can throw {{ProducerFencedExceptions}} if multiple sinks are used within the same sub-task. This can happen when operator-chaining results in two different sinks in the same topology being chained into a task, and thus into each of its sub-tasks.
> The problem is that {{TransactionIdsGenerator}} only takes into account the task name, the subtask index, the number of subtasks, and a couple of other things. All the attributes are the same between different {{FlinkKafkaProducer011s}} within the same sub-task, so they get the same transaction ids and one of them ends up failing.
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