[rules-users] Problem using KnowledgeAgent

Fri Feb 20 12:30:38 EST 2009

The only thing of interest in the server's log is:

2009-02-20 08:48:31,840 INFO  [STDOUT] DEBUG 20-02 08:48:31,840
(SelectorManager.java:<init>:27)   Loading selectors
2009-02-20 08:48:31,918 INFO  [STDOUT] DEBUG 20-02 08:48:31,918
(ContentManager.java:<init>:45)   Loading content properties

Though I see no Errors when I clean the estimator project in eclipse, I
see the following in the log:

!ENTRY org.drools.eclipse 4 120 2009-02-20 08:22:40.109
!MESSAGE Internal error in Drools Plugin: 
!STACK 0
java.lang.IllegalArgumentException: Could not parse process
L/estimator/src/main/rules/TestFlow.rf
 at org.drools.eclipse.DroolsEclipsePlugin.parseProcess(Unknown Source)
...

Don't know where that L comes from as the file is at
/estimator/src/main/rules/TestFlow.rf

I put the source of the estimator package into a file in eclipse and
tried to build it with KnowledgeBuilder, but have the same problem. It
just hangs at:
kbuilder.add(ResourceFactory.newClassPathResource("estimator.txt",
Test.class), ResourceType.DRL);

I've attached the estimator.txt file (renamed to txt so the eclipse
build wouldn't process it). I could try diving into the drools code to
see where it's deadlocking, 
but my time is very limited today. Let me know and I can find some time
this weekend.

Dan

________________________________

From: Mark Proctor [mailto:mproctor at codehaus.org] 
Sent: Friday, February 20, 2009 8:15 AM
To: Rules Users List
Subject: Re: [rules-users] Problem using KnowledgeAgent

Mark Proctor wrote: 

	Seaver, Daniel (GE Healthcare) wrote: 

		Thanks for the clarification, Mark. 

		I followed your links to get the latest of the greatest.
Happy to see all those blue circles in the build history. I downloaded:

		drools-5.0.0.SNAPSHOT-eclipse-all.zip
		drools-5.0.0.SNAPSHOT-guvnor.zip

		Then I updated eclipse with the contents of
...eclips-all.zip, Started eclipse and created a new runtime (which I
put in my jboss/server/default/lib folder and verified that the ones I
had installed there before were changed). I replaced the M5 version of
guvnor with the new one, and restarted everything.

		That should be all I need to do, right? Been at this for
a while, so I may be having a mental lapse.

		Anyways, several projects that I could build before the
upgrade don't build anymore. The build process hangs in Guvnor, as well
as in Eclipse. 

		This is the last output I get in the server's log when
trying to compile the package I'm using for our test:
		21:27:25,132 INFO [STDOUT] DEBUG 19-02 21:27:25,132
(SelectorManager.java:<init>:27) Loading selectors

		21:27:25,195 INFO [STDOUT] DEBUG 19-02 21:27:25,195
(ContentManager.java:<init>:45) Loading content properties

		The last thing I see in Eclipse when I try a complete
clean on our primary application is:

		    Building Workspace - Building all...: Invoking
"Drools Builder' on '/cbo-ejb'.

		The status shows 46% complete and just hangs there.

		I think it's time for a cocktail and a nice long sleep.
I'll check in tomorrow before rolling back to M5.

	can you look in the error logs? I was really hoping to CR1 over
the weekend. But we need to be sure these issues are gone.

Also if it's in guvnor and eclipse it sounds like a generic problem with
drools compiler. Can I ask you to remove the plugin and try and build
the rules via the knowledgebuilder yourself, hopefully you'll find the
deadlock there yourself and be able ot print a stack trace we can
actually use. Along with the offending rules.

Mark

		Dan

________________________________

		From: Mark Proctor [mailto:mproctor at codehaus.org] 
		Sent: Thursday, February 19, 2009 3:25 PM
		To: Rules Users List
		Subject: Re: [rules-users] Problem using KnowledgeAgent

		On the left side you see a list of red and blue circles,
red indicates that build was a failure and blue a success:
		https://hudson.jboss.org/hudson/job/drools/

		The last successful build has it's artifacts at:

https://hudson.jboss.org/hudson/job/drools/lastSuccessfulBuild/artifact/
trunk/target/

		As you can see the last build was successful so now you
can get all the binaries from above.

		Mark
		Edson Tirelli wrote: 

			   The tests are fixed and committed to revision
#25353.

			   []s
			   Edson

			2009/2/19 Mark Proctor <mproctor at codehaus.org>

				Dan Seaver wrote: 

				Yes, the exception occurs on both the
filesystem and Guvnor, and it happens
				whether I set the value to true or
false.

				I found the issue and reviewed the agent
code and this has been fixed in trunk. Edson si just fixing two failing
tests, but as soon as the build turns blue again grab the latest
artifact builds and give it a try:

https://hudson.jboss.org/hudson/job/drools/

				Mark 

				Michael Neale wrote:

				So from the filesystem it won't pick up
changes? (does it throw the
				same exception).

				On Thu, Feb 19, 2009 at 5:34 AM, Dan
Seaver <dan.seaver at ge.com> <mailto:dan.seaver at ge.com>  wrote:

				Mark,
				I have some more information for you.
The exception occurs when I issue:

agent.monitorResourceChangeEvents(true|false)

				If I comment out that code, I don't get
the exception, but I don't get
				changes either. I tried it with both the
Guvnor repository and with a
				deployed package on the file system.

				I won't have time to create the test you
requested until the weekend. Let
				me
				know if you still want it.

				Dan

				Mark Proctor wrote:

				Dan Seaver wrote:

				I setup a KnowledgeAgent using the
example code in the JavaDoc for
				KnowledgeAgentFactory to access a
compiled package in Guvnor. The
				package
				runs fine, but changes to the package
are not picked up. I believe this
				is
				due to the ChangeSet notification thread
being interrupted. But why?

				Hmm that's not good. I have the
following unit test:

http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-compiler/src/
test/java/org/drools/agent/KnowledgeAgentTest.java

				Could you provide an update for new
tests for detecting url changes?
				When making the test you might find it
easier to look at the previous
				ruleagent tests:

http://anonsvn.labs.jboss.com/labs/jbossrules/trunk/drools-core/src/test
/java/org/drools/agent/URLScannerTest.java

				Mark

				Also, I'm getting some messages about
failing to read schema document.
				I
				think it is caused by the xml for the
ChangeSet, but I'm using the
				example
				from the JavaDocs.

				We haven't provided an XSD yet, so it'll
provide schema validation
				issues, those can be ignored.

				Here's a snippet from the log:

				[2009:02:48 23:02:905:info]
KnowledegAgent has started listening for
				ChangeSet notifications
				[2009:02:48 23:02:905:info]
KnowledgAgent created, with configuration:
				monitorChangeSetEvents=true
scanResources=true scanDirectories=true
				[2009:02:48 23:02:905:exception
				java.lang.RuntimeException:
KnowledgeAgent ChangeSet notification
				thread
				has
				been interrupted
				     at

org.drools.agent.impl.KnowledgeAgentImpl$ChangeSetNotificationDetector.r
un(KnowledgeAgentImpl.java:465)
				     at java.lang.Thread.run(Unknown
Source)
				Caused by:
java.lang.InterruptedException
				     at

java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.re
portInterruptAfterWait(Unknown
				Source)
				     at

java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.aw
ait(Unknown
				Source)
				     at
java.util.concurrent.LinkedBlockingQueue.take(Unknown Source)
				     at

org.drools.agent.impl.KnowledgeAgentImpl$ChangeSetNotificationDetector.r
un(KnowledgeAgentImpl.java:463)
				     ... 1 more
				[2009:02:48 23:02:937:info]
KnowledegAgent has stopped listening for
				ChangeSet notifications
				(null: 1, 207): schema_reference.4:
Failed to read schema document
				'drools-change-set-5.0.xsd', because 1)
could not find the document; 2)
				the
				document could not be read; 3) the root
element of the document is not
				<xsd:schema>.
				(null: 1, 207): cvc-elt.1: Cannot find
the declaration of element
				'change-set'.
				(null: 1, 216): schema_reference.4:
Failed to read schema document
				'drools-change-set-5.0.xsd', because 1)
could not find the document; 2)
				the
				document could not be read; 3) the root
element of the document is not
				<xsd:schema>.
				(null: 1, 343): schema_reference.4:
Failed to read schema document
				'drools-change-set-5.0.xsd', because 1)
could not find the document; 2)
				the
				document could not be read; 3) the root
element of the document is not
				<xsd:schema>.
				[2009:02:48 23:02:390:info]
KnowledgAgent applying ChangeSet

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				-- 
				Michael D Neale
				home: www.michaelneale.net
				blog: michaelneale.blogspot.com

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			-- 
			 Edson Tirelli
			 JBoss Drools Core Development
			 JBoss, a division of Red Hat @ www.jboss.com

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