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https://issues.apache.org/jira/browse/SPARK-12312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17095288#comment-17095288
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Gabor Somogyi commented on SPARK-12312:
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I think the current approach can be used to implement pooling. Of course couple
of problems must be solved.
Without super deep consideration I would say task retry would be a good point
to re-create connection just like it was in Kafka case.
Pooling really worth a design doc because each and every connector makes
authentication differently...
> JDBC connection to Kerberos secured databases fails on remote executors
> -----------------------------------------------------------------------
>
> Key: SPARK-12312
> URL: https://issues.apache.org/jira/browse/SPARK-12312
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.5.2, 2.4.2
> Reporter: nabacg
> Priority: Minor
>
> When loading DataFrames from JDBC datasource with Kerberos authentication,
> remote executors (yarn-client/cluster etc. modes) fail to establish a
> connection due to lack of Kerberos ticket or ability to generate it.
> This is a real issue when trying to ingest data from kerberized data sources
> (SQL Server, Oracle) in enterprise environment where exposing simple
> authentication access is not an option due to IT policy issues.
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