[jira] [Commented] (FLINK-7221) JDBCOutputFormat swallows errors on last batch

["Fabian Hueske (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-7221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16092793#comment-16092793 ] 

Fabian Hueske commented on FLINK-7221:
--------------------------------------

Thanks for reporting and looking into this issue [~kgeis]!
You are right, we should definitely throw an exception if the execution of the batch fails.

Would you like to prepare a patch for this?

Thanks, Fabian

> JDBCOutputFormat swallows errors on last batch
> ----------------------------------------------
>
>                 Key: FLINK-7221
>                 URL: https://issues.apache.org/jira/browse/FLINK-7221
>             Project: Flink
>          Issue Type: Bug
>          Components: Batch Connectors and Input/Output Formats
>    Affects Versions: 1.3.1
>         Environment: Java 1.8.0_131, PostgreSQL driver 42.1.3
>            Reporter: Ken Geis
>
> I have a data set with ~17000 rows that I was trying to write to a PostgreSQL table that I did not (yet) have permission on. No data was loaded, and Flink did not report any problem outputting the data set. The only indication I found of my problem was in the PostgreSQL log.
> With the default parallelism (8) and the default batch interval (5000), my batches were ~2000 rows each, so they were never executed in {{JDBCOutputFormat.writeRecord(..)}}. {{JDBCOutputFormat.close()}} does a final call on {{upload.executeBatch()}}, but if there is a problem, it is logged at INFO level and not rethrown. 
> If I decrease the batch interval to 100 or 1000, then an error is properly reported.



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