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https://issues.apache.org/jira/browse/FLINK-13498?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nico Kruber closed FLINK-13498.
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Resolution: Fixed
Fix Version/s: 1.10.0
fixed on master via d774fea
> Reduce Kafka producer startup time by aborting transactions in parallel
> -----------------------------------------------------------------------
>
> Key: FLINK-13498
> URL: https://issues.apache.org/jira/browse/FLINK-13498
> Project: Flink
> Issue Type: Bug
> Components: Connectors / Kafka
> Affects Versions: 1.8.1, 1.9.0
> Reporter: Nico Kruber
> Assignee: Nico Kruber
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.10.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> When a Flink job with a Kafka producer starts up without previous state, it
> currently starts 5 * kafkaPoolSize number of Kafka producers (per sink
> instance) to abort potentially existing transactions from a first run without
> a completed snapshot.
> Apparently, this is quite slow and it is also done sequentially. Until there
> is a better way of aborting these transactions with Kafka, we could do this
> in parallel quite easily and at least make use of lingering CPU resources.
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