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https://issues.apache.org/jira/browse/FLINK-19115?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17188999#comment-17188999
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McClone commented on FLINK-19115:
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Why does elasticsearch connector have a large number of class with flnal and
package permissions, which is not conducive to extension.
> Null value fields cannot be ignored in ElasticSearch Sink
> ---------------------------------------------------------
>
> Key: FLINK-19115
> URL: https://issues.apache.org/jira/browse/FLINK-19115
> Project: Flink
> Issue Type: Bug
> Components: Connectors / ElasticSearch
> Affects Versions: 1.11.0
> Reporter: McClone
> Priority: Critical
>
> Null value fields cannot be ignored in ElasticSearch Sink
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