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https://issues.apache.org/jira/browse/BEAM-9629?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ismaël Mejía reassigned BEAM-9629:
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Assignee: Ismaël Mejía
> JdbcIO seems to run out of connections in the connection pool and freezes
> pipeline
> ----------------------------------------------------------------------------------
>
> Key: BEAM-9629
> URL: https://issues.apache.org/jira/browse/BEAM-9629
> Project: Beam
> Issue Type: Bug
> Components: io-java-jdbc
> Affects Versions: 2.19.0
> Environment: Dataflow, Direct Runner on macOS Catalina.
> Reporter: Boris Shilov
> Assignee: Ismaël Mejía
> Priority: Major
> Labels: performance
>
> Greetings,
> I am using JdbcIO via the Scala wrappers provided in the Scio project. I am
> trying to read a few dozen tables in parallel from MySQL, but above 8
> concurrent SELECT operations the pipeline freezes. With help of the Scio
> maintainers we've been able to isolate the issue as likely originating in
> JdbcIO running out of connections in the connection pool and idling
> indefinitely. The issue occurs both on the Direct Runner and Dataflow.
> Please see linked issue for more context:
> https://github.com/spotify/scio/issues/2774
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