Handle IndexError while collecting stats.
Handle IndexError while collecting stats.

Change-Id: Icc4aba96c6a583e22c05ac8814d433a12729d44f

ultilix/catawampus,pombredanne/catawampus,pombredanne/catawampus,ankurjimmy/catawampus,ultilix/catawampus,shineyear/catawampus,ankurjimmy/catawampus,shineyear/catawampus