I have been struggling for two days with an issue using the DataStream API in Batch Execution mode.
It seems as though my side-output has no elements available to downstream operators. However, I am certain that the downstream operator received events. I logged the side-output element just before it was collected. There are no exceptions in the logs. However, everytime I run the job the side-output appears empty. I noticed https://issues.apache.org/jira/browse/FLINK-20517 So, I keyed my output tag immediately after retrieving it, and that also did not help. Any advice or information on this would be appreciated. Thank you.
