Re: [rules-users] No errors thrown from KnowledgeAgent

Dear Drools users, Apparently it was not caused by the previously mentioned fix. Sometimes I still had a KnowledgeAgent in my server that doesn't respond anymore which seems to be caused by a mistake in the DRL file. I started to investigate the source code of KnowledgeAgentImpl and KnowledgeBaseImpl and recompiled them to add some prints. Finally I tracked it until AbstractRuleBase.addPackages. There is a giant Try-final block and I noticed by adding prints that it stopped somewhere in the middle. When it does fail, my KnowledgeAgent stops working completely. The try-final seemed to be the only place for me where an exception might be ignored so I added a catch clause. As a result, the error report of my drl file was nicely printed and my agent didn't crash: *org.drools.RuntimeDroolsException: Unable to resolve class 'int' for global 'RULES_MATCHED' at org.drools.common.AbstractRuleBase.mergePackage(AbstractRuleBase.java:818) at org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:615) at org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:472) at org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:153) at org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:1173) at org.drools.agent.impl.KnowledgeAgentImpl.incrementalBuildResources(KnowledgeAgentImpl.java:1058) at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:738) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:259) at org.drools.agent.impl.KnowledgeAgentImpl$ChangeSetNotificationDetector.run(KnowledgeAgentImpl.java:1357) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334) at java.util.concurrent.FutureTask.run(FutureTask.java:166) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) at java.lang.Thread.run(Thread.java:722) * Maybe there is a reason for this missing catch so I am not sure whether I fixed it and broke something else ( eg. maybe I should undo a part of the operations before I continue). Is there anyone who knows this code and who can help me? Extra information: - I use Drools 5.5 from the Maven repository. - my agent configuration: agentConf.setProperty("drools.agent.newInstance", "false"); agentConf.setProperty("drools.agent.useKBaseClassLoaderForCompiling", "true"); Kind Regards, De Rooms Brecht Op 31/07/2013 14:45, De Rooms Brecht schreef: > The bug was caused by one of the InputStreams that was not closed > properly which caused the knowledgeAgent to block. > I think my issues are solved now. > > Thanks for looking into this. > Kind Regards, > > Op 31/07/2013 14:19, De Rooms Brecht schreef: >> 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 >>>> _______________________________________________ >>>> rules-users mailing list >>>> rules-users(a)lists.jboss.org >>>> https://lists.jboss.org/mailman/listinfo/rules-users >>>> >>> _______________________________________________ >>> rules-users mailing list >>> rules-users(a)lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/rules-users >>> >> >> >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users > > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users