[rules-users] Resource Change Scanner Service modified date error

Tue Jan 17 04:48:29 EST 2012

So, maybe some change in PackageBuilder is not setting the correct Resource
to Declared Fact types. Unfortunately I don't have time right now to take a
look at this problem.
Could you try adding DRL resource instead of compiled package?

Best Regards,

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com

2012/1/17 Dean Eastwood <dean at qualica.com>

> Hi Esteban
>
> Unfortunately I haven't had time to work further on this issue, so I don't
> have an answer yet.
>
> All I can say for now is it seems that the ReaderResources are being
> created along with the URLResource each time. This is evidenced by the
> details below.
>
> In my test, I have the following changeset based on the mortgages sample
> (I have changed my hosting port):
>
>
> ----------------------------------------------------------------------------------------------
>
> *<change-set xmlns='http://drools.org/drools-5.0/change-set'*
> *    xmlns:xs='http://www.w3.org/2001/XMLSchema-instance'*
> *    xs:schemaLocation='http://drools.org/drools-5.0/change-set
> http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-api/src/main/resources/change-set-1.0.0.xsd'
> >*
> *    <add>*
> *         <resource source='
> http://localhost:8090/guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST'
> type='PKG' />*
> *    </add>*
> *</change-set>*
>
> ----------------------------------------------------------------------------------------------
>
>
> This changeset can be read as a UrlResource, ClassPathResource or
> ByteArrayResource. I then use the following code to initialise the
> KnowledgeAgent:
>
> ----------------------------------------------------------------------------------------------
>
>
> *SystemEventListenerFactory.setSystemEventListener(new
> PrintStreamSystemEventListener(System.out));*
> *        *
> *KnowledgeAgent kagent =
> KnowledgeAgentFactory.newKnowledgeAgent("MortgageAgent");*
> *Resource changeset =
> ResourceFactory.newClassPathResource("ChangeSet.xml");*
> *kagent.applyChangeSet(changeset);*
>
> ----------------------------------------------------------------------------------------------
>
>
> Within the System event listener output, I see that the KnowledgeAgent
> picks up all of the KnowledgeDefinitions from Drools and creates them as
> new UrlResources. Next, it picks up the KnowledgeDefinitions from drools
> and creates these all as null ReaderResources. Here is some output from my
> System event listener:
>
> ----------------------------------------------------------------------------------------------
>
>
> *[2012-01-17 10:32:32,577:debug] KnowledgeAgent rebuilding KnowledgeBase
> using ChangeSet*
> *[2012-01-17 10:32:33,410:debug] KnowledgeAgent building resource map*
>  *[2012-01-17 10:32:33,411:debug] KnowledgeAgent no resource mapped for
> rule=[Rule name=Dummy rule, agendaGroup=MAIN, salience=0, no-loop=false]*
> *[2012-01-17 10:32:33,411:debug] KnowledgeAgent mapping
> resource=[UrlResource path='
> http://localhost:8090/guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST']
> to KnowledgeDefinition=[Rule name=Dummy rule, agendaGroup=MAIN, salience=0,
> no-loop=false]*
> *[2012-01-17 10:32:33,411:debug] KnowledgeAgent mapping
> resource=[UrlResource path='
> http://localhost:8090/guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST']
> to KnowledgeDefinition=[Rule name=Underage, agendaGroup=MAIN, salience=10,
> no-loop=false]*
> *[2012-01-17 10:32:33,411:debug] KnowledgeAgent mapping
> resource=[UrlResource path='
> http://localhost:8090/guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST']
> to KnowledgeDefinition=[Rule name=Bankruptcy history, agendaGroup=MAIN,
> salience=10, no-loop=false]*
> *[2012-01-17 10:32:33,411:debug] KnowledgeAgent mapping
> resource=[UrlResource path='
> http://localhost:8090/guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST']
> to KnowledgeDefinition=[Rule name=No bad credit checks, agendaGroup=MAIN,
> salience=10, no-loop=false]*
> *[2012-01-17 10:32:33,411:debug] KnowledgeAgent mapping
> resource=[UrlResource path='
> http://localhost:8090/guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST']
> to KnowledgeDefinition=[Rule name=no NINJAs, agendaGroup=MAIN, salience=10,
> no-loop=false]*
> *[2012-01-17 10:32:33,411:debug] KnowledgeAgent mapping
> resource=[UrlResource path='
> http://localhost:8090/guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST']
> to KnowledgeDefinition=[Rule name=Row 3 Pricing loans, agendaGroup=MAIN,
> salience=0, no-loop=false]*
> *[2012-01-17 10:32:33,411:debug] KnowledgeAgent mapping
> resource=[UrlResource path='
> http://localhost:8090/guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST']
> to KnowledgeDefinition=[Rule name=Row 1 Pricing loans, agendaGroup=MAIN,
> salience=0, no-loop=false]*
> *[2012-01-17 10:32:33,411:debug] KnowledgeAgent mapping
> resource=[UrlResource path='
> http://localhost:8090/guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST']
> to KnowledgeDefinition=[Rule name=Row 2 Pricing loans, agendaGroup=MAIN,
> salience=0, no-loop=false]*
> *[2012-01-17 10:32:33,411:debug] KnowledgeAgent mapping
> resource=[UrlResource path='
> http://localhost:8090/guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST']
> to KnowledgeDefinition=[Rule name=CreditApproval, agendaGroup=MAIN,
> salience=0, no-loop=false]*
> *[2012-01-17 10:32:33,411:debug] KnowledgeAgent mapping
> resource=[UrlResource path='
> http://localhost:8090/guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST']
> to KnowledgeDefinition=[Rule name=DateDslRule, agendaGroup=MAIN,
> salience=0, no-loop=false]*
> *[2012-01-17 10:32:33,411:debug] KnowledgeAgent mapping
> resource=[UrlResource path='
> http://localhost:8090/guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST']
> to KnowledgeDefinition=[Rule name=CheckBoxDslRule, agendaGroup=MAIN,
> salience=0, no-loop=false]*
> *[2012-01-17 10:32:33,412:debug] KnowledgeAgent mapping
> resource=[UrlResource path='
> http://localhost:8090/guvnor/org.drools.guvnor.Guvnor/package/mortgages/LATEST']
> to KnowledgeDefinition=[Rule name=RegexDslRule, agendaGroup=MAIN,
> salience=0, no-loop=false]*
> *[2012-01-17 10:32:33,412:debug] KnowledgeAgent mapping
> resource=[ReaderResource resource=null encoding='null'] to
> KnowledgeDefinition=org.drools.rule.TypeDeclaration at b10723b8*
> *[2012-01-17 10:32:33,412:debug] KnowledgeAgent notifier subscribing to
> resource=[ReaderResource resource=null encoding='null']*
> *[2012-01-17 10:32:33,412:debug] ResourceChangeNotification subscribing
> listener=org.drools.agent.impl.KnowledgeAgentImpl at 54b216b3 to
> resource=[ReaderResource resource=null encoding='null']*
> *[2012-01-17 10:32:33,412:debug] ResourceChangeScanner subcribing
> notifier=org.drools.io.impl.ResourceChangeNotifierImpl at 77f06d35 to
> resource=[ReaderResource resource=null encoding='null']*
> *[2012-01-17 10:32:33,412:debug] KnowledgeAgent mapping
> resource=[ReaderResource resource=null encoding='null'] to
> KnowledgeDefinition=org.drools.rule.TypeDeclaration at a562a3f*
> *[2012-01-17 10:32:33,412:debug] KnowledgeAgent mapping
> resource=[ReaderResource resource=null encoding='null'] to
> KnowledgeDefinition=org.drools.rule.TypeDeclaration at 9baaa763*
> *[2012-01-17 10:32:33,412:debug] KnowledgeAgent mapping
> resource=[ReaderResource resource=null encoding='null'] to
> KnowledgeDefinition=org.drools.rule.TypeDeclaration at fadf3f01*
> *[2012-01-17 10:32:33,412:info] KnowledgeAgent new KnowledgeBase now
> built and in use*
> *[2012-01-17 10:32:33,412:debug] KnowledgeAgent finished rebuilding
> KnowledgeBase using ChangeSet*
>
> ----------------------------------------------------------------------------------------------
>
>
> As a result of these ReaderResources existing, the ResourceChangeScanner
> cannot run as the ReaderResources do not have a modified date.
>
> At the moment I am not sure why these ReaderResources are created but I
> would imagine they are there to represent the drools domain facts. There
> are four facts in the mortgages sample and four ReaderResources are created.
>
> Regards
>
> Dean
>
>
>
>
>
> 2012/1/17 Esteban Aliverti <esteban.aliverti at gmail.com>
>
>> Dean, did you figure out why your code is using a ReaderResource? There
>> are other threads reporting this same problem.
>>
>> Best Regards,
>>
>> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
>>
>> Esteban Aliverti
>> - Developer @ http://www.plugtree.com
>> - Blog @ http://ilesteban.wordpress.com
>>
>>
>> On Fri, Jan 6, 2012 at 2:14 PM, Jiri Svitak <jsvitak at redhat.com> wrote:
>>
>>> Hello Dean,
>>>
>>> you are right,
>>> https://issues.jboss.org/browse/GUVNOR-1699
>>> solves something different. Bugzilla
>>> https://bugzilla.redhat.com/show_bug.cgi?id=733008
>>> still waits to be solved. I have updated this bugzilla to be linked to
>>> belonging JIRA issues.
>>> You can look also on other bugs which have the same root cause. But I am
>>> not developer, so I cannot
>>> tell you when it'll be fixed.
>>>
>>> Jiri Svitak
>>>
>>> On 01/05/2012 02:27 PM, Dean wrote:
>>> > Hi
>>> >
>>> > I am experiencing a problem with starting the
>>> ResourceChangeScannerService
>>> > as described here: https://bugzilla.redhat.com/show_bug.cgi?id=733008
>>> >
>>> > I can create a KnowledgeAgent instance and apply a changeset to it
>>> which
>>> > loads the desired package from Guvnor. However, as soon as I attempt to
>>> > start the ScannerService in order to be notified of changes to this
>>> package
>>> > I immediately receive the exception: java.lang.IllegalStateException:
>>> reader
>>> > does have a modified date. Then on every scanner interval following,
>>> the
>>> > scanner fails each time with the same error message.
>>> >
>>> > Apparently, this issue has already been fixed here:
>>> > https://issues.jboss.org/browse/GUVNOR-1699
>>> >
>>> > However, I am still experiencing this problem even with Drools
>>> 5.4.0.Beta1
>>> >
>>> > Could somebody perhaps help me with this. I am attempting to rebuild
>>> the
>>> > source code on my side, however, I am having endless problems with
>>> Maven.
>>> >
>>> > Regards
>>> >
>>> > Dean
>>> >
>>> > --
>>> > View this message in context:
>>> http://drools.46999.n3.nabble.com/Resource-Change-Scanner-Service-modified-date-error-tp3634802p3634802.html
>>> > Sent from the Drools: User forum mailing list archive at Nabble.com.
>>> > _______________________________________________
>>> > rules-users mailing list
>>> > rules-users at lists.jboss.org
>>> > https://lists.jboss.org/mailman/listinfo/rules-users
>>>
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>>
>>
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