Github user StephanEwen commented on the issue:
https://github.com/apache/flink/pull/6075
If it is not a problem that this can lead to poor compression when
checkpoint intervals are short, we could think about merging this as a
temporary solution until
[FLINK-9749](https://issues.apache.org/jira/browse/FLINK-9749) is fully
developed.
I would suggest to make the ORC and table dependencies optional, though,
that not every user of the BucketingSink needs to have these dependencies.---
