We upgraded to DataStax 4 and ran into this bug.
https://issues.apache.org/jira/browse/PIG-3120
We already have a work around in, do we need to wait on a new release?
DSE 4.0 only supports pig 0.10 release. Your fix is 0.12 release which is not included in DSE 4.0. We may patch 0.10 and replace the jar bundled in DSE 4.0