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https://issues.apache.org/jira/browse/FLINK-23813?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xintong Song updated FLINK-23813:
---------------------------------
    Affects Version/s:     (was: 1.12.2)
                           (was: 1.12.1)
                           (was: 1.13.0)
                           (was: 1.12.0)
                       1.14.0
                       1.12.5

> DeleteExecutor NPE
> ------------------
>
>                 Key: FLINK-23813
>                 URL: https://issues.apache.org/jira/browse/FLINK-23813
>             Project: Flink
>          Issue Type: Bug
>          Components: Connectors / JDBC
>    Affects Versions: 1.14.0, 1.12.5, 1.13.2
>            Reporter: Junning Liang
>            Priority: Critical
>             Fix For: 1.14.0
>
>
> Encountered a situation where I get an NPE from JDBCUpsertOutputFormat.
> This occurs when jdbc disconnected and try to reconnect.
> I need to write data to mysql in upsert way in sql, So it must group by 
> unique key and the JdbcBatchingOutputFormat of Jdbc sink would use 
> TableJdbcUpsertOutputFormat.
>  
> Jdbc would disconnected when The data interval exceeds the set connection 
> time.I see that when jdbc reconnect , only 
> JdbcBatchingOutputFormat#jdbcStatementExecutor(insert) would 
> prepareStatements but TableJdbcUpsertOutputFormat#deleteExecutor would not 
> prepareStatements so that come up NPE.
> if in JdbcBatchingOutputFormat have a protected function to reset 
> PrepareStatement and TableJdbcUpsertOutputFormat override this function to 
> reset deleteExecutor, it would work well.
> prepareStatements 



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