The issue has been fixed on all customer instances hosted by Adobe.
A list is a static set of profiles that can be targeted in delivery actions or updated during import operations or during workflow execution. For example, a population extracted from the database via a query can supply a list.
For more information on the list and group feature, see Campaign Classic documentation.
Data written to unlogged tables is not written to the write-ahead log (WAL) which makes them considerably faster than ordinary tables. However, they are not crash-safe: an unlogged table is automatically truncated after a crash or unclean shutdown. The content of an unlogged table is also not replicated to standby servers. Any indexes created in an unlogged table are automatically unlogged as well.
Recent backup strategies rely on the WAL, which means that in practice, lists are not being backed up. For more information, see How to increase PostgreSQL write performance.
Although we were unable to reproduce the data loss experienced in PostgreSQL, we still recommend to convert to Oracle LOGGING status tables where loss of data is critical. It should be noted that moving from NOLOGGING to LOGGING will increase the disk space utilization of the redo and undo logs.
Although highly unlikely, check that the tablespace where the tables reside is also marked as LOGGING. As with PostgreSQL, tables that are created with NOLOGGING do not replicate because they are not written to the redo logs. Note that an abnormal crash could lead to the loss of data from any table designated as NOLOGGING.
A simple script can be used to identify and generate a script to convert the NOLOGGING tables to LOGGING.
select 'ALTER TABLE ' || table_name || ' LOGGING;' from dba_indexes where logging='NO' AND substr(table_name,1,3) in ('GRP','LST','SHD');
On Adobe Campaign Classic, dataloss can happen on lists of type List and Group.
On instances ran or running on a impacted build, list tables are created in unlogged. Consequently if an incident occurs in the database leading to an unclean shutdown (like crash), the content of the list tables will be lost.
The impacted build depends of the database server used. For more information, see Database documentation.
build number >= 8795 AND build number < 8977 AND build number != 8937
build number >= 5544 AND build number < 8977 AND build number != 8937
The Database Administrator needs to manually perform the unlogged to logged transformation of list tables.
The Database Administrator needs to follow database documentation recommendations.