[jira] [Commented] (BEAM-7230) Using JdbcIO creates huge amount of connections

["Luke Cwik (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-7230?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16962469#comment-16962469 ] 

Luke Cwik commented on BEAM-7230:
---------------------------------

The issue is that PoolableDataSourceProvider stores dataSourceProviderFn as a static which means that it will never be serialized and once it is deserialized it is lost.

 

This means that any tests that don't include serializing and deserializing the Source/DoFns won't catch this. So remote execution will be broken.

> Using JdbcIO creates huge amount of connections
> -----------------------------------------------
>
>                 Key: BEAM-7230
>                 URL: https://issues.apache.org/jira/browse/BEAM-7230
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-dataflow
>    Affects Versions: 2.11.0
>            Reporter: Brachi Packter
>            Assignee: Ismaël Mejía
>            Priority: Major
>             Fix For: 2.13.0
>
>          Time Spent: 2h 50m
>  Remaining Estimate: 0h
>
> I want to write form DataFlow to GCP cloud SQL, I'm using connection pool, and still I see huge amount of connections in GCP SQL (4k while I set connection pool to 300), and most of them in sleep.



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