Asynchronous Servicetasks doesn't work with DB2
see more in following forum thread
'selectExclusiveJobsToExecute' does not work for DB2 and MSSQL
only use this file, if you are using DB2.
Thanks Martin, we will add it as db-specific query for db2, then.
This seems to be the same issue as ACT-1170. I am closing this one as there is more discussion around ACT-1170