Digging into this more, I see that the exec dbo.sp_MSmaximum_cleanup_seqno call isn't returning a @max_cleanup_xact_seqno record.

This means the query

select top 1 @max_cleanup_xact_seqno = xact_seqno

from MSrepl_transactions with (nolock)

where

publisher_database_id = @publisher_database_id and

(xact_seqno < @min_xact_seqno

or @min_xact_seqno IS NULL) and

entry_time <= @min_cutoff_time

order by xact_seqno desc

returns nothing. I debugged it and it's doing a loop that populates the @min_xact_seqno variable with various values. Most would return a @max_cleanup_xact_seqno, but the last value placed in @min_xact_seqno isn't found at all in the msrepl_transactions table. So I'm wondering if this indicates an issue? Anyone know?