Re: [rules-users] Events do not get removed automatically

Hi guys, the drools fusion documentation states that "One of the benefits of running the engine in STREAM mode is that the engine can detect when an event can no longer match any rule due to its temporal constraints.

When that happens, the engine can safely retract the event from the session without side effects and release any resources used by that event." I have a hard time understanding why my events do not get removed. In the following example I have following rules running in stream mode: ---------------------------------------------------------------------------------------------------------------------------- package rules import java.util.logging.Logger declare GenericEvent @role(event) playerIndex : long eventName : String card : String chosenSuit : String end declare Table currentPlayerIndex : long topCard : String end rule "new table" when not Table() then insert(new Table(0,"a")); end rule "discardChoosing" when $event : GenericEvent(eventName=="discardCard", $playerIndex : playerIndex, card.equals("c")) from entry-point "my stream" $table : Table(currentPlayerIndex==$playerIndex, !topCard.equals("c")) then Logger.getLogger("####").info("discardChoosing FIRED"); modify($table) {setTopCard("c")}; end rule "choosingSuit" no-loop when $event : GenericEvent(eventName=="choosingSuit", $playerIndex : playerIndex, $chosenSuit : chosenSuit) from entry-point "my stream" $table : Table(currentPlayerIndex==$playerIndex) $discardCardEvent : GenericEvent(eventName=="discardCard", playerIndex==$playerIndex, card.equals("c")) from entry-point "my stream" then Logger.getLogger("####").info("choosingSuit FIRED"); modify($table) {setCurrentPlayerIndex($table.getCurrentPlayerIndex() + 1)}; end rule "previousPlayer" when $event : GenericEvent(eventName=="previousPlayer") from entry-point "my stream" $table : Table() then Logger.getLogger("####").info("previousPlayer FIRED"); modify($table) {setCurrentPlayerIndex($table.getCurrentPlayerIndex() - 1)}; end ---------------------------------------------------------------------------------------------------------------------------- I would expect after inserting "discardCard" followed by "choosingSuit" event, both should be retracted as their conditions do not evaluate to true anymore. But even after sleeping a couple of seconds, the rule "choosingSuit" fires again, which means to me the events are still in working memory. Here is the log output: inserting GenericEvent( playerIndex=0, eventName=discardCard, card=c, chosenSuit=null ) INFO: discardChoosing FIRED INFO: choosingSuit FIRED inserting GenericEvent( playerIndex=0, eventName=choosingSuit, card=null, chosenSuit=HEARTS ) Sleeping 9 seconds... Sleeping done. Printing facts: Fact handle: [fact 0:2:1690464956:1690464956:5:DEFAULT:Table( currentPlayerIndex=1, topCard=c )] inserting GenericEvent( playerIndex=0, eventName=previousPlayer, card=null, chosenSuit=null ) INFO: previousPlayer FIRED INFO: choosingSuit FIRED INFO: previousPlayer FIRED INFO: choosingSuit FIRED INFO: previousPlayer FIRED INFO: choosingSuit FIRED INFO: previousPlayer FIRED INFO: choosingSuit FIRED INFO: previousPlayer FIRED ... I'm running Drools 5.4 and inserting/executing in this way: List cmds = new ArrayList(); cmds.add(CommandFactory.newInsert(discard, "event", false, "my stream")); cmds.add(CommandFactory.newFireAllRules(20)); System.out.println("inserting " + discard); ksession.execute(CommandFactory.newBatchExecution(cmds)); Any help is highly appreciated.