Github user aljoscha commented on the pull request:
https://github.com/apache/flink/pull/426#issuecomment-78897265
Hi,
in Java, the CsvOutputFormat used to only emit Tuples, we know that these
are mutable, therefore they are reused. The ScalaCsvOutputFormat emits case
classes (Scala Tuples are in fact Case Classes). These are generally not
mutable, the fields cannot be changed. Therefore we have to create a new object
every time.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
