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https://issues.apache.org/jira/browse/FLINK-16325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17251102#comment-17251102
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Jark Wu commented on FLINK-16325:
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[~todd5167], however, the {{JdbcBatchingOutputFormat#attemptFlush}} will call
{{jdbcStatementExecutor.executeBatch()}} which re-add values into the
statement. So I think there no data lose.
We also have a similar discussion in the PR of FLINK-19723.
> A connection check is required, and it needs to be reopened when the JDBC
> connection is interrupted
> ----------------------------------------------------------------------------------------------------
>
> Key: FLINK-16325
> URL: https://issues.apache.org/jira/browse/FLINK-16325
> Project: Flink
> Issue Type: Improvement
> Components: Connectors / JDBC
> Affects Versions: 1.10.0
> Reporter: renjianxu
> Priority: Minor
>
> JDBCOutputFormat#writeRecord.
> When writing data, if the JDBC connection has been disconnected, the data
> will be lost.Therefore, a connectivity judgment is required in the
> writeRecord method.
>
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