flink-1.11 ddl 写入json 格式数据到hdfs问题

如同[1]里面说的，对于csv和json，你还需要配置rolling相关参数，因为它们是可以不在checkpoint强行rolling的。

NOTE: For row formats (csv, json), you can set the parameter

sink.rolling-policy.file-size or sink.rolling-policy.rollover-interval in

the connector properties and parameter execution.checkpointing.interval in

flink-conf.yaml together if you don’t want to wait a long period before

observe the data exists in file system. For other formats (avro, orc), you

can just set parameter execution.checkpointing.interval in flink-conf.yaml.

所以如果你想通过时间来rolling，你还需要配sink.rolling-policy.rollover-interval和sink.rolling-policy.check-interval

[1]

https://ci.apache.org/projects/flink/flink-docs-master/dev/table/connectors/filesystem.html#rolling-policy*来自志愿者整理的flink邮件归档