add error log if split_diff fails
add error log if split_diff fails

davygeek/vitess,dcadevil/vitess,enisoc/vitess,tirsen/vitess,tinyspeck/vitess,tinyspeck/vitess,HubSpot/vitess,davygeek/vitess,vitessio/vitess,sougou/vitess,sougou/vitess,mahak/vitess,HubSpot/vitess,HubSpot/vitess,mattharden/vitess,mattharden/vitess,tinyspeck/vitess,mattharden/vitess,tirsen/vitess,HubSpot/vitess,davygeek/vitess,mahak/vitess,alainjobart/vitess,mahak/vitess,tirsen/vitess,dcadevil/vitess,tirsen/vitess,mahak/vitess,enisoc/vitess,vitessio/vitess,tinyspeck/vitess,mahak/vitess,davygeek/vitess,enisoc/vitess,dcadevil/vitess,alainjobart/vitess,vitessio/vitess,dcadevil/vitess,alainjobart/vitess,sougou/vitess,mattharden/vitess,mattharden/vitess,tirsen/vitess,HubSpot/vitess,davygeek/vitess,mattharden/vitess,davygeek/vitess,alainjobart/vitess,mattharden/vitess,mahak/vitess,dcadevil/vitess,davygeek/vitess,tinyspeck/vitess,alainjobart/vitess,vitessio/vitess,sougou/vitess,tirsen/vitess,HubSpot/vitess,sougou/vitess,sougou/vitess,vitessio/vitess,tirsen/vitess,HubSpot/vitess,sougou/vitess,tirsen/vitess,alainjobart/vitess,mattharden/vitess,mahak/vitess,enisoc/vitess,enisoc/vitess,mattharden/vitess,dcadevil/vitess,vitessio/vitess,dcadevil/vitess,vitessio/vitess,vitessio/vitess,alainjobart/vitess,tinyspeck/vitess,sougou/vitess,tinyspeck/vitess,tirsen/vitess,mahak/vitess,alainjobart/vitess,enisoc/vitess,HubSpot/vitess,mattharden/vitess,enisoc/vitess