Add logging for debugging S223170
Summary: more context in T86752810. Add info for tensor lengths size to see if it fails on in complete batch
Test Plan: manually created failed run: f258719092
Reviewed By: aartibasant
Differential Revision: D27181049
fbshipit-source-id: 341c020a3430c410f9726d92315efb80d36e9452
