The document history database maintains a record of guaranteed documents processed by webMethods messaging triggers and persistent messages processed by JMS triggers. The database keeps a document history only for triggers that specify that document history should be used as part of duplicate detection. Integration Server adds entries to the document history database when a trigger service begins executing and when it executes to completion (whether it ends in success or failure).

For more information about exactly-once processing for webMethods messaging triggers or JMS triggers, see webMethods Service Development Help.