I was dealing with a replication issue, the Log Reader Agent was failing with the following messages:
Error messages:
The process could not execute 'sp_replcmds' on 'ServerName'. (Source: MSSQL_REPL, Error number: MSSQL_REPL20011)
Get help: http://help/MSSQL_REPL20011
Cannot execute as the database principal because the principal "dbo" does not exist, this type of principal cannot be impersonated, or you do not have permission. (Source: MSSQLServer, Error number: 15517)
Get help: http://help/15517
The process could not execute 'sp_replcmds' on 'ServerName'. (Source: MSSQL_REPL, Error number: MSSQL_REPL22037)
Get help: http://help/MSSQL_REPL22037
In several forums you will see a discussions about it, but most of them didn't provide a final solution for it.
The solution for it is really simple:
ALTER AUTHORIZATION ON DATABASE::[DatabaseName] TO sa
The reason is, the DB was restored from another environment or was restored from an old SQL Version.
