Github user maqingxiang commented on the issue: https://github.com/apache/flink/pull/6051 The schema on this page:[https://ci.apache.org/projects/flink/flink-docs-master/dev/connectors/filesystem_sink.html]( https://ci.apache.org/projects/flink/flink-docs-master/dev/connectors/filesystem_sink.html) is right (in this [file](https://github.com/apache/flink/blob/master/docs/dev/connectors/filesystem_sink.md))
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