2:29 p.m.
I will check this problem. I'll need to create a test scenario first.
Which version of drools are you using? Does the error still occurrs if you
point to the drl instead of the directory?
Best regards!
El ene 14, 2011 5:14 p.m., "ljnelson" <ljnelson(a)gmail.com> escribió:
Seeing some strange things on a production system.
I have Drools set up to use a KnowledgeAgent.
I have the KnowledgeAgent set up to scan resources and directories.
The agent is pointed at--let's say--C:\LEAD\rules, where "LEAD" is the name
of the project in question and "rules" is a directory underneath which I
would like to have several .drl files.
I begin by placing one well-known, valid .drl file under there. That
obviously loads up fine and the rules go into effect.
If I deliberately introduce a syntax error, I hear about it in the
logs--that's fine too.
But if I then remove the syntax error, it's as though scanning stops. The
KnowledgeAgent appears as though it is never rebuilt again, so it appears
simply to be broken.
I will obviously supply more details as needed, but thought I'd fire this
quick flare to see if anyone knows of any simple cause here.
Best,
Laird
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8:04 p.m.
New subject: Drools 5.1: What happens when an incremental KA rebuild fails?
Esteban wrote:
I will check this problem. I'll need to create a test scenario first.
I am so embarrassed that I never got back to you!
I am using Drools 5.1.1. The error occurs when I am pointing at the .drl
file too.
The scanner says (after the error) that it is scanning 0 resources (instead
of 1).
I'll see what else I can come up with. Unfortunately, this makes the whole
prospect of using rules in my application a little hard if I have to restart
the server when there's a syntax error. :-(
Thanks for looking into it.
Best,
Laird
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8:48 a.m.
New subject: Drools 5.1: What happens when an incremental KA rebuild fails?
This is interesting. Here are some logs. Note the entry where it says that
the resource now has no subscribers. So it's like when the KnowledgeBase
building operation fails, the subscriber isn't hooked back up to the
resource. I presume it probably should be. I'll have a look in the code
and see what I can see.
Best,
Laird
[#|2011-02-15T09:42:08.103-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=16;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|ResourceChangeScanner
modified resource=[UrlResource
path='file:/Users/ljnelson/Projects/lead/drl/LEADRules.drl'] : 1297776756000
: 1297780925000|#]
[#|2011-02-15T09:42:08.103-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=16;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|ResourceChangeNotifier
received ChangeSet notification|#]
[#|2011-02-15T09:42:08.103-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=16;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|ResourceChangeScanner
thread is waiting for 20 seconds.|#]
[#|2011-02-15T09:42:08.103-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=17;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|ResourceChangeNotification
processing ChangeSet|#]
[#|2011-02-15T09:42:08.104-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=17;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|ResourceChangeNotification
ChangeSet modified resource=[UrlResource
path='file:/Users/ljnelson/Projects/lead/drl/LEADRules.drl'] for
listener=com.edugility.drools.jca.JCACompliantKnowledgeAgent@14b2d46|#]
[#|2011-02-15T09:42:08.104-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=17;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|KnowledgeAgent
received ChangeSet changed notification|#]
[#|2011-02-15T09:42:08.104-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=17;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|ResourceChangeNotification
thread is waiting for queue update|#]
[#|2011-02-15T09:42:08.104-0500|INFO|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=19;_ThreadName=Thread-1;|KnowledgeAgent
applying ChangeSet|#]
[#|2011-02-15T09:42:08.113-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=19;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|KnowledgeAgent
removing mappings for resource=[UrlResource
path='file:/Users/ljnelson/Projects/lead/drl/LEADRules.drl'] with
unsubscribe=true|#]
[#|2011-02-15T09:42:08.113-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=19;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|KnowledgeAgent
notifier unsubscribing to resource=[UrlResource
path='file:/Users/ljnelson/Projects/lead/drl/LEADRules.drl']|#]
[#|2011-02-15T09:42:08.113-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=19;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|ResourceChangeNotification
unsubscribing
listener=com.edugility.drools.jca.JCACompliantKnowledgeAgent@14b2d46 to
resource=[UrlResource
path='file:/Users/ljnelson/Projects/lead/drl/LEADRules.drl']|#]
[#|2011-02-15T09:42:08.114-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=19;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|ResourceChangeScanner
unsubcribing
notifier=com.edugility.drools.jca.JCACompliantResourceChangeNotifier@8dac48
to resource=[UrlResource
path='file:/Users/ljnelson/Projects/lead/drl/LEADRules.drl']|#]
[#|2011-02-15T09:42:08.114-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=19;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|ResourceChangeScanner
resource=[UrlResource
path='file:/Users/ljnelson/Projects/lead/drl/LEADRules.drl'] now has no
subscribers|#]
[#|2011-02-15T09:42:08.114-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=19;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|KnowledgeAgent
rebuilding KnowledgeBase using ChangeSet|#]
[#|2011-02-15T09:42:08.114-0500|INFO|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=19;_ThreadName=Thread-1;|KnowledgeAgent
performing an incremental build of the ChangeSet|#]
[#|2011-02-15T09:42:09.327-0500|WARNING|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=19;_ThreadName=Thread-1;[4976,2]:
[ERR 102] Line 4976:2 mismatched input 'then' expecting ')' in rule
"AfterBINTK364_B";[5206,2]: [ERR 102] Line 5206:2 mismatched input
'then'
expecting ')' in rule "AfterBINTK365_A";|KnowledgeAgent has
KnowledgeBuilder
errors |#]
[#|2011-02-15T09:42:09.328-0500|WARNING|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=19;_ThreadName=Thread-1;|KnowledgeAgent:
The resource didn't create any package: [UrlResource
path='file:/Users/ljnelson/Projects/lead/drl/LEADRules.drl']|#]
[#|2011-02-15T09:42:09.331-0500|INFO|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=19;_ThreadName=Thread-1;|KnowledgeAgent
incremental build of KnowledgeBase finished and in use|#]
[#|2011-02-15T09:42:09.331-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=19;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|KnowledgeAgent
finished rebuilding KnowledgeBase using ChangeSet|#]
[#|2011-02-15T09:42:28.103-0500|FINER|glassfish3.1|com.edugility.drools.jca.LoggerSystemEventListener|_ThreadID=16;_ThreadName=Thread-1;ClassName=org.drools.core.util.DelegatingSystemEventListener;MethodName=debug;|ResourceChangeScanner
attempt to scan 0 resources|#]
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12:55 p.m.
New subject: Drools 5.1: What happens when an incremental KA rebuild fails?
Bug filed: https://issues.jboss.org/browse/JBRULES-2904
Best,
Laird
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1:58 p.m.
New subject: Drools 5.1: What happens when an incremental KA rebuild fails?
Ok, I'm working on it. As you mentioned, the problem was that the agent got
unsubscribed from the resource, and because the compilation fails, it
doesn't get re-subscribed.
From now on, when the compilation of a resource fails, all the
knowledge
definitions that were defined by that resource are going to be removed
but
the agent is not going to unsubscribe itself from the resource.
What do you think?
Best Regards,
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com
On Wed, Feb 16, 2011 at 3:55 PM, ljnelson <ljnelson(a)gmail.com> wrote:
Bug filed: https://issues.jboss.org/browse/JBRULES-2904
Best,
Laird
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2:07 p.m.
New subject: Drools 5.1: What happens when an incremental KA rebuild fails?
On Wed, Feb 16, 2011 at 3:00 PM, Esteban [via Drools - Java Rules Engine] <
ml-node+2512373-1999498509-10124(a)n3.nabble.com> wrote:
Ok, I'm working on it. As you mentioned, the problem was that the
agent got
unsubscribed from the resource, and because the compilation fails, it
doesn't get re-subscribed.
From now on, when the compilation of a resource fails, all the knowledge
definitions that were defined by that resource are going to be removed but
the agent is not going to unsubscribe itself from the resource.
What do you think?
That sounds right to me.
Best,
Laird
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