A database contains a corpus of incident reports, a machine learning (ML)model trainedto calculate paragraph vectors of the incident reports, and a look-up settable that contains a listof paragraph vectors respectively associated with sets of the incidentreports. A plurality of MLworker nodes each store the look-up set table and are configured to executethe ML model. Anupdate thread is configured to: determine that the look-up set table hasexpired; update thelook-up set table by: (i) adding a first set of incident reports receivedsince a most recent update of thelook-up set table, and (ii) removing a second set of incident reportscontaining timestamps thatare no longer within a sliding time window; store, in the database, the look-up set table asupdated; and transmit, to the ML worker nodes, respective indications that thelook-up set tablehas been updated.
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