I ran an Analytic snapshot, and the answer I got was that some rows have failed.
2000 records were inserted... 0 records failed...
My data has more than 2000 records, how do I debug it? Where is the error?
The error you are getting is because analytic snapshots only support 2000 records max at the moment. There's an existing idea posted to vote for removing this limitation. The error 'Some rows failed' is because you are hitting the 2000 record limit. This is a related post which may help.