Hello David and thanks for responding.
I know it supports these event listeners and I use them. In my program, I have two knowledge agents and the first one (preprocessing) will read the file, preprocess a DRL and then write a second modified DRL file in a folder that is monitored by the second one. When I modify the original DRL file (1. in prints below) monitored by the preprocessing agent, everything works fine and the rule is triggered (2.). However, when I delete a file (3.), the knowledgeAgent just blocks after AfterChangeSetAppliedEvent and does not do anything anymore.. If I send new data in the knowledgeAgent it does not react anymore.

I would expect to get a stacktrace of what went wrong but I do not get any info besides of the systemeventlistener or knowledgeagentlistener. Is there any way I can get a stacktrace?
Kind Regards,
De Rooms Brecht

1. Resources Changed => Modified:  [[FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]
    eventListener 1::: ==>[BeforeResourceProcessedEvent(RESOURCE_REMOVED): [FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]
    eventListener 1::: ==>[AfterResourceProcessedEvent(RESOURCE_REMOVED): [FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]
    eventListener 1::: ==>[AfterChangeSetProcessedEvent: ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[], resourcesModified=[[FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']], knowledgeDefinitionsRemoved=[]}]
    eventListener 1::: ==>[ResourceCompilationFailedEvent: org.drools.builder.impl.KnowledgeBuilderImpl@70d0d127]
    eventListener 1::: ==>[KnowledgeBaseUpdatedEvent: org.drools.impl.KnowledgeBaseImpl@49669be]
    eventListener 1::: ==>[AfterChangeSetAppliedEvent: ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[], resourcesModified=[[FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']], knowledgeDefinitionsRemoved=[]}]
    eventListener 2::: ==>[BeforeChangeSetAppliedEvent: ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[], resourcesModified=[[FileResource file='knowledge\packaged\test.brules.testRule.drl']],     knowledgeDefinitionsRemoved=[]}]
    eventListener 2::: ==>[BeforeResourceProcessedEvent(RESOURCE_REMOVED): [FileResource file='knowledge\packaged\test.brules.testRule.drl']]
    eventListener 2::: ==>[AfterResourceProcessedEvent(RESOURCE_REMOVED): [FileResource file='knowledge\packaged\test.brules.testRule.drl']]
    eventListener 2::: ==>[AfterChangeSetProcessedEvent: ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[], resourcesModified=[[FileResource file='knowledge\packaged\test.brules.testRule.drl']], knowledgeDefinitionsRemoved=[]}]
    eventListener 2::: ==>[KnowledgeBaseUpdatedEvent: org.drools.impl.KnowledgeBaseImpl@11c834d1]

2. Rules are triggered when the PKG file its knowledge is updated:
    Changed This Rule::: Got Event: TestEvent( number=5, message=doesDynamicEventTypeWork? )
    Changed This Rule::: Got Event: TestEvent( number=4, message=doesDynamicEventTypeWork? )
    Changed This Rule::: Got Event: TestEvent( number=2, message=doesDynamicEventTypeWork? )
    Changed This Rule::: Got Event: TestEvent( number=1, message=doesDynamicEventTypeWork? )
    Changed This Rule::: Got Event: TestEvent( number=2, message=doesDynamicEventTypeWork? )
    Changed This Rule::: Got Event: TestEvent( number=1, message=doesDynamicEventTypeWork? )
    Changed This Rule::: Got Event: TestEvent( number=2, message=doesDynamicEventTypeWork? )
    Changed This Rule::: Got Event: TestEvent( number=1, message=doesDynamicEventTypeWork? )

    eventListener 2::: ==>[AfterChangeSetAppliedEvent: ChangeSetImpl{resourcesRemoved=[], resourcesAdded=[], resourcesModified=[[FileResource file='knowledge\packaged\test.brules.testRule.drl']],         knowledgeDefinitionsRemoved=[]}]
    eventListener 1::: ==>[BeforeChangeSetAppliedEvent: ChangeSetImpl{resourcesRemoved=[[FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']], resourcesAdded=[],                 resourcesModified=[], knowledgeDefinitionsRemoved=[]}]
    eventListener 1::: ==>[BeforeChangeSetProcessedEvent: ChangeSetImpl{resourcesRemoved=[[FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']], resourcesAdded=[], resourcesModified=[], knowledgeDefinitionsRemoved=[]}]


3. Resources Changed => Removed:   [[FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]
    eventListener 1::: ==>[BeforeResourceProcessedEvent(RESOURCE_MODIFIED): [FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]
    eventListener 1::: ==>[AfterResourceProcessedEvent(RESOURCE_MODIFIED): [FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']]
    eventListener 1::: ==>[AfterChangeSetProcessedEvent: ChangeSetImpl{resourcesRemoved=[[FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']], resourcesAdded=[], resourcesModified=[],     knowledgeDefinitionsRemoved=[]}]
    eventListener 1::: ==>[KnowledgeBaseUpdatedEvent: org.drools.impl.KnowledgeBaseImpl@49669be]
    eventListener 1::: ==>[AfterChangeSetAppliedEvent: ChangeSetImpl{resourcesRemoved=[[FileResource file='knowledge\realtimeKnowledge\test.brules.testRule.drl']], resourcesAdded=[], resourcesModified=[], knowledgeDefinitionsRemoved=[]}]

 .... and then it was quiet....

Op 31/07/2013 09:42, Davide Sottara schreef:

The KA logs to a SystemEventListener, and supports a dedicated event
listener for
additions/updates/etc...

You can do:

kagent.setSystemEventListener( new PrintStreamSystemEventListener() );
kagent.addEventListener( new DebugKnowledgeAgentEventListener(  ) );



On 07/30/2013 01:55 AM, De Rooms Brecht wrote:

Dear Drools users,

I have been testing with the KnowledgeAgent from version 5.4 and 5.5. It 
monitors a changeset and is set to incrementally build the 
knowledgebase. I noticed that it sometimes crashes but never throws out 
errors. This happens for example when I define a type two times and when 
I remove a file. Does anyone experience similar behaviour and has an 
idea of how I could see the errors? I already tried to check the errors 
by building it myself using a knowledgebuilder before I update the file 
that the knowledgeAgent monitors but that's quite a dirty solution.

Kind Regards,
De Rooms Brecht
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