Redundant Delete in Unification log

Reported for version 10

What is Redundant delete in the unification log?

Redundant Delete in the unification log serves to describe how many new records (records without database entries) have been marked for deletion. Redundant delete: 0 is the expected behaviour, but if there are frequently many redundant deletes, it could help to identify an underlying problem.

Example log
INFO: [16894] new 1
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5][repos_pat]
INFO: [16895] 0 joined
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5]
INFO: [16894] change 0
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5]
INFO: [16895] new 1
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5]
INFO: [16894] unchange 0
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5]
INFO: [16895] change 0
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5]
INFO: [16894] delete 0
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5]
INFO: [16895] unchange 0
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5]
INFO: [16894] redundant	 delete 0
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5]
INFO: [16895] delete 0
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5]
INFO: [16894] discard 0
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5]
INFO: [16894] processing...
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5][repos_pat]
INFO: [16894] expanding #0
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5]
INFO: [16895] redundant delete 0
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5]
INFO: [16895] discard 0
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5]
INFO: [16895] processing...
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5][repos_pat]
INFO: [16895] expanding #0
Feb 18, 2016 8:35:27 AM [OnlineServicesComponent][patient_match.online][patient_match][patient_match.comp][Matching 5][repos_pat]
INFO: [16894] 7 expanded