Change to use arrays only the size needed.

Change-Id: I4b38b79a6968f261509771bf5fa581f142a5b6f6
Parallel combine works.

Change-Id: Ic55422047e2716cd95039589e0878ec207128a53
Remove extraneous debug messages.

Change-Id: Ia842f0c0fa659e60bcb0e6eb148afb3be37f2363
Merge topic 'expand_fragment_integration' into next

63efb52a Remove extraneous debug messages.
908f452a Parallel combine works.
4591da01 Change to use arrays only the size needed.