Re: [rules-users] Memory issues
Wolfgang - Thanks for your response. I have removed the KnowledgeAgent and changed to build the KnowledgeBase without the use of an agent. The ChangeSetXML contains just the compiled binary because there is another process which pulls the compiled binary from the Guvnor. This allows the business users to update the rules in the Guvnor and test in a staging application. When the rules are ready to be moved to production, a process is kicked off that pulls all the binaries from the Guvnor. This allows the business to know exactly when the rules were moved to production and by who [in case there was a problem]. Thanks again. From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Wolfgang Laun Sent: Thursday, July 14, 2011 5:04 AM To: Rules Users List Subject: Re: [rules-users] Memory issues Hi, it's still guesswork in parts - circumstantial evidence at best. The purpose of a KnowledgeAgent is to monitor resources for building a KnowledgeBase, typically by periodic inspection of certain parts of the file system and reacting to updates. But you set all scan.X properties to false, turning the feature completely off. This means that you use a KnowledgeAgent merely as a convenience tool for creating a rule base. This is a sign of laziness (one of the three great virtues of a programmer <http://c2.com/cgi/wiki?LazinessImpatienceHubris> ) but even it must be exercised with care. However: why does the change Set XML contain just the compiled binary? This means that stuff is compiled elsewhere, and only the result copied to a place that's being monitored by - which part of your application? Agents are notoriously hard to kill, and the KA is one of these. If, for instance you start resource change monitoring for an agent, it'll run a thread that keeps a reference to the KA. So, just wiping a Map will not rid the program of the KA objects, and this is bound to keep a lot of other biggies alive. Did you ever monitor to see running threads? Or existing objects per class? HTH -W 2011/7/13 Jeffrey Schneller Yes. The 18 KnowledgeAgents produce 18 StatefulKnowledgeSessions when they are needed. The session has dispose() called on it when it is not needed any longer. The Map maps the following: X = product name Y = the Knowledge Agent associated to a product. Code does the following when rules need to be run against a product. 1) Get KnowledgeAgent out of Map based on product name 2) Create a StatefulKnowledgeSession 3) Insert the facts about the product 4) Fire all rules 5) Dispose of StatefulKnowledgeSession We have no problems with the 5 steps that are followed. The rules are configuration and pricing rules for each product. The facts are the options specified for a particular product. The rules compute the price of the product as specified by the desired options and any incompatible options selected [very similar to what you would see on car manufacturers website for pricing a particular car] If there is a better way to do this, I would be interested in knowing. Jeff From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Wolfgang Laun Sent: Wednesday, July 13, 2011 1:27 PM To: Rules Users List Subject: Re: [rules-users] Memory issues This is strange - do you mean that those 18 KnowledgeAgents stored in that Map produce 18 different StatefulKnowledgeSessions? What does the Map map? X? Y? -W 2011/7/13 Jeffrey Schneller I am currently running version 5.1.0M2. I have 18 different binary rulesets [packages] that are stored on the local filesystem. The rulesets range in size from 4K to 131Mb. When my application starts I load each ruleset into a knowledgeAgent and store the knowledgeAgent into a hashmap which is stored in memory. They are loaded using the following xml: The knowledgeAgentConfiguration is setup as: drools.agent.scanDirectories = false drools.agent.newInstance = false drools.agent.scanResources = false drools.agent.monitorChangeEvents = false After the all the agents are loaded and stored in the hashmap the total memory used in the app is 6.2GB. Once the application is running, if a business user needs to update a set of rules there is a process in place to refresh all the knowledgeAgents with new rulesets. In a new thread. the code clears the hashmap, sets the hashmap to null, calls for garbage collection to occur, and it then constructs a new hashmap and loads all the rules as it does at application startup. The knowledge agent is logging the following when the ruleset is loaded: KnowledgeAgent applying ChangeSet KnowledgeAgent performing an incremental build of the ChangeSet KnowledgeAgent incremental build of KnowledgeBase finished and in use It takes a large amount of time to do this process [double to triple the time of applic
Re: [rules-users] Memory issues
Yes. The 18 KnowledgeAgents produce 18 StatefulKnowledgeSessions when they are needed. The session has dispose() called on it when it is not needed any longer. The Map maps the following: X = product name Y = the Knowledge Agent associated to a product. Code does the following when rules need to be run against a product. 1) Get KnowledgeAgent out of Map based on product name 2) Create a StatefulKnowledgeSession 3) Insert the facts about the product 4) Fire all rules 5) Dispose of StatefulKnowledgeSession We have no problems with the 5 steps that are followed. The rules are configuration and pricing rules for each product. The facts are the options specified for a particular product. The rules compute the price of the product as specified by the desired options and any incompatible options selected [very similar to what you would see on car manufacturers website for pricing a particular car] If there is a better way to do this, I would be interested in knowing. Jeff From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Wolfgang Laun Sent: Wednesday, July 13, 2011 1:27 PM To: Rules Users List Subject: Re: [rules-users] Memory issues This is strange - do you mean that those 18 KnowledgeAgents stored in that Map produce 18 different StatefulKnowledgeSessions? What does the Map map? X? Y? -W 2011/7/13 Jeffrey Schneller I am currently running version 5.1.0M2. I have 18 different binary rulesets [packages] that are stored on the local filesystem. The rulesets range in size from 4K to 131Mb. When my application starts I load each ruleset into a knowledgeAgent and store the knowledgeAgent into a hashmap which is stored in memory. They are loaded using the following xml: The knowledgeAgentConfiguration is setup as: drools.agent.scanDirectories = false drools.agent.newInstance = false drools.agent.scanResources = false drools.agent.monitorChangeEvents = false After the all the agents are loaded and stored in the hashmap the total memory used in the app is 6.2GB. Once the application is running, if a business user needs to update a set of rules there is a process in place to refresh all the knowledgeAgents with new rulesets. In a new thread. the code clears the hashmap, sets the hashmap to null, calls for garbage collection to occur, and it then constructs a new hashmap and loads all the rules as it does at application startup. The knowledge agent is logging the following when the ruleset is loaded: KnowledgeAgent applying ChangeSet KnowledgeAgent performing an incremental build of the ChangeSet KnowledgeAgent incremental build of KnowledgeBase finished and in use It takes a large amount of time to do this process [double to triple the time of application startup]. After this occurs the memory used by the app increases [to nearly double the original size 12.2GB] and the CPU is maxed out. After some time the CPU usage drops and the app is usable again but the memory never decreases. If a business user refreshes the rules again, the memory increases again and the CPU is maxed out and the app becomes unresponsive because the memory is completely maxed out. There is obviously a memory leak somewhere and a large one at that. Is this the proper way to be caching KnowledgeAgents into memory so the rulessets don't need to be re-loaded everytime a knowledgeAgent is run? Is my problem the use of the hashmap? Do I need to remove the original knowledgeAgents that were in the hashmap? Thanks for any help. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Memory issues
I am currently running version 5.1.0M2. I have 18 different binary rulesets [packages] that are stored on the local filesystem. The rulesets range in size from 4K to 131Mb. When my application starts I load each ruleset into a knowledgeAgent and store the knowledgeAgent into a hashmap which is stored in memory. They are loaded using the following xml: The knowledgeAgentConfiguration is setup as: drools.agent.scanDirectories = false drools.agent.newInstance = false drools.agent.scanResources = false drools.agent.monitorChangeEvents = false After the all the agents are loaded and stored in the hashmap the total memory used in the app is 6.2GB. Once the application is running, if a business user needs to update a set of rules there is a process in place to refresh all the knowledgeAgents with new rulesets. In a new thread. the code clears the hashmap, sets the hashmap to null, calls for garbage collection to occur, and it then constructs a new hashmap and loads all the rules as it does at application startup. The knowledge agent is logging the following when the ruleset is loaded: KnowledgeAgent applying ChangeSet KnowledgeAgent performing an incremental build of the ChangeSet KnowledgeAgent incremental build of KnowledgeBase finished and in use It takes a large amount of time to do this process [double to triple the time of application startup]. After this occurs the memory used by the app increases [to nearly double the original size 12.2GB] and the CPU is maxed out. After some time the CPU usage drops and the app is usable again but the memory never decreases. If a business user refreshes the rules again, the memory increases again and the CPU is maxed out and the app becomes unresponsive because the memory is completely maxed out. There is obviously a memory leak somewhere and a large one at that. Is this the proper way to be caching KnowledgeAgents into memory so the rulessets don't need to be re-loaded everytime a knowledgeAgent is run? Is my problem the use of the hashmap? Do I need to remove the original knowledgeAgents that were in the hashmap? Thanks for any help. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Is Drools appropriate for this app scenario?
Yes, the site is pure java. UI is done with Wicket, DB is done via hibernate, Rules - drools core and guvnor. 1) As I said in my original email, the shop owner UI was realized by excel spreadsheet templates. The Guvnor allows rules to be written via an excel file template. Ideally, it would be a GUI based app but the spreadsheets work and are more cost effective in this case. The spreadsheets can also be moved around to different systems [dev, test, staging, production] and allow rules to be written disconnected from the web. 2a) not sure what you are asking 2b) We have the following rule types: Pricing - computes price for a product based on configuration Configuration - rules which tell which option is required, default values for options, and when a particular option or value is not available based on other configuration choices BOM - based on the configuration generate a BOM Presentation - only used to determine how to display the picture of the configured product. All these rules are in our service tier. The presentation tier knows nothing about the rules and just knows what to present to the user. 3) Our rules are pretty simple. A bunch of when clauses and a few consequence clauses. There are not too many rules which cause other rules to fire since we only allow the user to select valid choices in the UI. The default value rules do cause a cascade of firing and these are always run first and only run if a default value needs to be set. 4) We do not use rules for entity metadata definition. We certainly could have but we maintain that via a database and a front-end GUI app. This is not something that can be done in a couple of weeks. The UI, rules, etc... took months [and more months] to develop. There were lots of refactoring of code and rules to get it right. Let me know [off-line] if you need more information or want to discuss specific information. Jeff -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Sebastien Chevalier Sent: Thursday, January 27, 2011 8:10 AM To: rules-users@lists.jboss.org Subject: Re: [rules-users] Is Drools appropriate for this app scenario? Dear Jeff: First, thank you very much for your quick reply. Concerning your StoneSide shop, yes indeed this is pretty much the functionality that I target, and it is a proof that it works well for a *web* app. If I got it right, you used a pure *server*-centric rules-based architecture based on Java, Drools (Expert, Guvnor(?)) and Wicket, right? (1) ...But, how did you realize the shop owner UI, the one where (s)he can define the rules? Is it a web interface too, probably reusing Guvnor components, or a separate stand-alone app? Relative to the internal architecture: (2) Could you please give me some more hints on which arch components are working under the covers? -- Especially: (2a) Which top-level components are used and which interface type do they provide? (2b) Which rule "types" must be in place? (please, see next paragraph for details) I suppose that, following a layered architecture, you'll need rules at every of the arch layers, most obviously "data/entity based rules" and "presentation based rules". Less obvious to me is, if actually necessary (?), the "data-to-presentation mapping mechanism" which extracts facts from the data layer and places the required artifacts onto the presentation, probably having also some rules for injecting custom presentation and/or collection/storage behavior into the components (i.e., rules in the controller layer). Are these assumptions correct? (3) How do your rules (rule types) typically look like, and how work they together (map on each other)??? (4) Do you also use rules for "entity metadata definition" (i.e., dyn. compositions of entity types from predefined property components)? I'd really be very grateful for the clarification of these issues and/or any further-helping descriptions. Thank (all of) you very much in advance. Best regards Sebastien -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Is-Drools-appropriat e-for-this-app-scenario-tp2303204p2362526.html Sent from the Drools - User mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Is Drools appropriate for this app scenario?
Sebastien, I have built an e-commerce site [www.stoneside.com] with some if not all of the things you are talking about. If you go there and design a product you can see the rules working. Drools is being used for: Pricing rules and discounts within a product. Rules regarding what components of a product can exist with other components. [the end-user is custom designing something to purchase] Rules determine how to display the product as the end-user designs their product. Rules generate the BOM once the user ultimately orders the product that they designed. All the rules are managed using excel spreadsheet templates. We [the developers] defined the templates and the business enters the rules into the spreadsheet. This has worked pretty well. The biggest hurdle being defining the templates correctly and populating the initial sets of rules. Some of the more complex products have at least 5K rules [across all 4 areas of rules] that needed to be defined. So, I think it is appropriate for your app scenario. You will need to think about what you need as rules and what those rule 'templates' need to look like. Jeff -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Sebastien Chevalier Sent: Wednesday, January 26, 2011 6:28 AM To: rules-users@lists.jboss.org Subject: Re: [rules-users] Is Drools appropriate for this app scenario? @plugtreelabs: First of all, thank you very much for your response and hints. @all: As I'm still not quire sure how to realize my scenario: Please, could someone provide me with some diagrams or architectural sketches of a typical rules-based e-commerce web application? -- Or at least point me to online resources on that topic, especially showing the integration of the RBMS in a web app? This would really help me out a lot at the moment. _Recap: The main goal is that endusers shall, on the one hand, define almost the whole set of entities and rules in an initial shop specification/configuration process, and on the other hand, this set shall be modifiable later on (primarily through enhancements, not restrictions). The entity set basically is: customer types, product categories, products, product packages, customer(type)-to-product(type) price assignments (i.e. pricing rules), and inter-product/package selection rules, ...all of these dynamically definable via a WebUI and in a manner appropriate for non-technical end-users (considering declarative programming a good approach for this(?)). The most dynamic parts will be the multi-dimensional pricing tables in terms of (a) their schema -- when new pricing parameters (=dimensions) like delivery distance are added -- and (b) their value contents -- when concrete prices change. Another quite dynamic part will be the inter-product selection rule specifications from which a "smart" e-catalog will be generated for the client-side. Such rules will state sth. like: "Prod A must always be ordered with Prod B", "Prod B can never be ordered when Package C is selected", and similar. -- Currently, some "high-level architectural layouts" of a simple, rules-based e-commerce web app (Which components are necessary in which place? And which components are already delivered by Drools?) would be very helpful for me. Thank you very much for your help in advance. Best regards Sebastien -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Is-Drools-appropriat e-for-this-app-scenario-tp2303204p2353169.html Sent from the Drools - User mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools and Guvnor 5.1M2 - ExceptionbeingthrowninprocessChangeSet
Thanks for the info. Is there any way that you can add a call to do garbage collection after the knowledge agent is refreshed? I am noticing that all my rules stick around for some time until garbage collection is actually run. If rule packages are huge, modified, and rebuilt quickly the scanner will pick them up and process them but if garbage collection hasn't run after the last refresh then a bunch of stale objects are hanging around. I tested this by running a memory profile tool. After the rule refresh occurs all my rule object counts increase by 1. If I force garbage collection from the profile tool then all the rule object counts drop down to 1. Am I doing something wrong? When do you expect 5.1RC1 to be available? Thanks. From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Esteban Aliverti Sent: Thursday, July 01, 2010 1:27 PM To: Rules Users List Subject: Re: [rules-users] Drools and Guvnor 5.1M2 - ExceptionbeingthrowninprocessChangeSet The other error could be because of a bug I recently fixed: https://jira.jboss.org/browse/BRMS-320 It should be solved in 5.1RC1 I think. Best, 2010/7/1 Jeffrey Schneller Esteban, Here is the stack trace for the ClassNotFoundException when the compiler jar is not included. java.lang.ClassNotFoundException: org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader .java:1387) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader .java:1233) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.newInstance(S erviceRegistryImpl.java:190) at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.call(ServiceR egistryImpl.java:185) at org.drools.util.ServiceRegistryImpl.get(ServiceRegistryImpl.java:143) at org.drools.builder.KnowledgeBuilderFactory.loadServiceFactory(KnowledgeB uilderFactory.java:107) at org.drools.builder.KnowledgeBuilderFactory.getKnowledgeBuilderPServiceFa ctory(KnowledgeBuilderFactory.java:101) at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(Knowledge BuilderFactory.java:29) at org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(Knowl edgeAgentImpl.java:556) at org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(Knowl edgeAgentImpl.java:541) at org.drools.agent.impl.KnowledgeAgentImpl.incrementalBuildResources(Knowl edgeAgentImpl.java:731) at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAge ntImpl.java:515) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm pl.java:145) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm pl.java:130) Any idea on why the other error is appearing. The error is "java.lang.RuntimeException: KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage". This occurs when the knowledge agent is created with the compiled package from the Guvnor for the first time. Thank you for all your work and help. Drools is a great package. Thanks. From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Esteban Aliverti Sent: Thursday, July 01, 2010 8:09 AM To: Rules Users List Subject: Re: [rules-users] Drools and Guvnor 5.1M2 - Exception beingthrowninprocessChangeSet Could you please provide us the line number where de ClassNotFoundException occurs. I think I know what could be happening. When you use incremental change set processing (newInstance = false), the agent use a kbuilder to perform some diff between the modified and original resource. The thing is that the agent always instantiate a kbuilder even if all the resources are already compiled (which is useless). Please provide me the line number of the exception, i will start working on this issue. Meanwhile, as a workaround, add the drools-compiler dependency. The KAgent was practically rebuilt from scratch since 5.1M1 so these kind of error were expected ;) Best, 2010/7/1 Jeffrey Schneller As a follow-up, this did work however there are still some problems. The rules did get pulled into the application and seem to be running but clearly something is not right. I needed to include the drools-compiler.jar in my app otherwise I was getting a ClassNotFoundException. I am pulling a compiled package from the Guvnor so not sure why I need the compiler jar in my app. When the rules are pulled into the app I am getting the exception thrown which is being logged and the app can continue running: 2010-07-01 00:36:14,201 | INFO (MyDroolsListener.java:41) KnowledgeAgen
Re: [rules-users] Drools and Guvnor 5.1M2 - Exception beingthrowninprocessChangeSet
Esteban, Here is the stack trace for the ClassNotFoundException when the compiler jar is not included. java.lang.ClassNotFoundException: org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader .java:1387) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader .java:1233) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:169) at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.newInstance(S erviceRegistryImpl.java:190) at org.drools.util.ServiceRegistryImpl$ReflectionInstantiator.call(ServiceR egistryImpl.java:185) at org.drools.util.ServiceRegistryImpl.get(ServiceRegistryImpl.java:143) at org.drools.builder.KnowledgeBuilderFactory.loadServiceFactory(KnowledgeB uilderFactory.java:107) at org.drools.builder.KnowledgeBuilderFactory.getKnowledgeBuilderPServiceFa ctory(KnowledgeBuilderFactory.java:101) at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(Knowledge BuilderFactory.java:29) at org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(Knowl edgeAgentImpl.java:556) at org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(Knowl edgeAgentImpl.java:541) at org.drools.agent.impl.KnowledgeAgentImpl.incrementalBuildResources(Knowl edgeAgentImpl.java:731) at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAge ntImpl.java:515) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm pl.java:145) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm pl.java:130) Any idea on why the other error is appearing. The error is "java.lang.RuntimeException: KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage". This occurs when the knowledge agent is created with the compiled package from the Guvnor for the first time. Thank you for all your work and help. Drools is a great package. Thanks. From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Esteban Aliverti Sent: Thursday, July 01, 2010 8:09 AM To: Rules Users List Subject: Re: [rules-users] Drools and Guvnor 5.1M2 - Exception beingthrowninprocessChangeSet Could you please provide us the line number where de ClassNotFoundException occurs. I think I know what could be happening. When you use incremental change set processing (newInstance = false), the agent use a kbuilder to perform some diff between the modified and original resource. The thing is that the agent always instantiate a kbuilder even if all the resources are already compiled (which is useless). Please provide me the line number of the exception, i will start working on this issue. Meanwhile, as a workaround, add the drools-compiler dependency. The KAgent was practically rebuilt from scratch since 5.1M1 so these kind of error were expected ;) Best, 2010/7/1 Jeffrey Schneller As a follow-up, this did work however there are still some problems. The rules did get pulled into the application and seem to be running but clearly something is not right. I needed to include the drools-compiler.jar in my app otherwise I was getting a ClassNotFoundException. I am pulling a compiled package from the Guvnor so not sure why I need the compiler jar in my app. When the rules are pulled into the app I am getting the exception thrown which is being logged and the app can continue running: 2010-07-01 00:36:14,201 | INFO (MyDroolsListener.java:41) KnowledgeAgent performing an incremental build of the ChangeSet 2010-07-01 00:36:14,261 | ERROR (MyDroolsListener.java:30) java.lang.RuntimeException: KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage 2010-07-01 00:36:14,261 | WARN (MyDroolsListener.java:53) KnowledgeAgent: The resource didn't create any package: [UrlResource path='http://ruleserver/drools-guvnor/org.drools.guvnor.Guvnor/package/m y.rule.package/LATEST'] 2010-07-01 00:36:14,271 | INFO (MyDroolsListener.java:41) KnowledgeAgent incremental build of KnowledgeBase finished and in use Then if I rebuild the package in the Guvnor then I see the following [the two lines are repeated for each rule in the package]: [2010:07:182 00:07:741:debug] BinaryResourceDiffProducerImpl: Comparing [Rule name=v_32, agendaGroup=MAIN, salience=0, no-loop=false] against [Rule name=v_32, agendaGroup=MAIN, salience=0, no-loop=false] [2010:07:182 00:07:741:debug] BinaryResourceDiffProducerImpl: The rules have different LHS Thanks From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Esteban Aliverti Sent: Wednesday, June 30, 2010 6:35 PM To: Rules Users List Subject:
Re: [rules-users] Drools and Guvnor 5.1M2 - Exception beingthrownin processChangeSet
As a follow-up, this did work however there are still some problems.
The rules did get pulled into the application and seem to be running but
clearly something is not right.
I needed to include the drools-compiler.jar in my app otherwise I was
getting a ClassNotFoundException. I am pulling a compiled package from
the Guvnor so not sure why I need the compiler jar in my app.
When the rules are pulled into the app I am getting the exception thrown
which is being logged and the app can continue running:
2010-07-01 00:36:14,201 | INFO (MyDroolsListener.java:41) KnowledgeAgent
performing an incremental build of the ChangeSet
2010-07-01 00:36:14,261 | ERROR (MyDroolsListener.java:30)
java.lang.RuntimeException: KnowledgeAgent exception while trying to
deserialize KnowledgeDefinitionsPackage
2010-07-01 00:36:14,261 | WARN (MyDroolsListener.java:53)
KnowledgeAgent: The resource didn't create any package: [UrlResource
path='http://ruleserver/drools-guvnor/org.drools.guvnor.Guvnor/package/m
y.rule.package/LATEST']
2010-07-01 00:36:14,271 | INFO (MyDroolsListener.java:41) KnowledgeAgent
incremental build of KnowledgeBase finished and in use
Then if I rebuild the package in the Guvnor then I see the following
[the two lines are repeated for each rule in the package]:
[2010:07:182 00:07:741:debug] BinaryResourceDiffProducerImpl: Comparing
[Rule name=v_32, agendaGroup=MAIN, salience=0, no-loop=false] against
[Rule name=v_32, agendaGroup=MAIN, salience=0, no-loop=false]
[2010:07:182 00:07:741:debug] BinaryResourceDiffProducerImpl: The rules
have different LHS
Thanks
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Esteban
Aliverti
Sent: Wednesday, June 30, 2010 6:35 PM
To: Rules Users List
Subject: Re: [rules-users] Drools and Guvnor 5.1M2 - Exception
beingthrownin processChangeSet
The problem seams to happen because the kagent can't access the url.
If you try to access the change set xml using a browser, does the
browser ask you for authentication? I don't know why, but guvnor protect
its urls since 5.1 I think.
So, basically, the error is that guvnor can't read from the url. The
same error happens if you provide a non existent url. I need to open a
jira for this.
As a work around, try doing this:
Remember to replace username and password.
Best,
2010/6/30 Jeffrey Schneller
Here is the xml file I am getting:
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Esteban
Aliverti
Sent: Wednesday, June 30, 2010 3:18 PM
To: Rules Users List
Subject: Re: [rules-users] Drools and Guvnor 5.1M2 - Exception being
thrownin processChangeSet
Could you please post the xml file you are getting from
http://rulerserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.rul
e.package/LATEST/ChangeSet.xml
<http://rulerserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.ru
le.package/LATEST/ChangeSet.xml> ?
Best,
2010/6/30 Jeffrey Schneller
I am trying to upgrade to the 5.1M2 build from 5.0.1 and am running into
some issues. I have installed the new 5.1 Guvnor and imported the rules
from my 5.0.1 Guvnor instance.
I then removed the old 5.0.1 drools jars from my app and replaced them
with the 5.1M2 drools jars. I was also added all the dependent
libraries. The code that worked with the 5.0.1 version does not work
with the 5.1M2 version. In 5.0.1 I was constructing the xml and
streaming it into the applyChangeSet method. With 5.1M2 I am just
pointing to the change set xml file that is in the Guvnor.
I am seeing a NullPointerException being thrown in the processChangeSet
method as shown below.
Caused by: java.lang.NullPointerException
at
org.drools.agent.impl.KnowledgeAgentImpl.processChangeSet(KnowledgeAgent
Impl.java:171)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm
pl.java:143)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm
pl.java:130)
Did I miss something? Am I doing something wrong? Below is the code
that I have.
KnowledgeAgentConfiguration kaconf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
kaconf.setProperty( "drools.agent.scanDirectories",
"true" );
kaconf.setProperty("drools.agent.newInstance",
"false");
ResourceFactory.getResourceChangeScannerService().start();
ResourceFactory.getResourceChangeNotifierService().start();
String url =
"http://rulerserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.ru
le.package/LATEST/ChangeSet.xml";
Kn
Re: [rules-users] Drools and Guvnor 5.1M2 - Exception beingthrownin processChangeSet
Thanks. I started going down that path. It appears that even the
changeset xml file can't be found from the Guvnor. So I will need to
pass authentication with the URL given to the applyChangeset method.
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Esteban
Aliverti
Sent: Wednesday, June 30, 2010 6:35 PM
To: Rules Users List
Subject: Re: [rules-users] Drools and Guvnor 5.1M2 - Exception
beingthrownin processChangeSet
The problem seams to happen because the kagent can't access the url.
If you try to access the change set xml using a browser, does the
browser ask you for authentication? I don't know why, but guvnor protect
its urls since 5.1 I think.
So, basically, the error is that guvnor can't read from the url. The
same error happens if you provide a non existent url. I need to open a
jira for this.
As a work around, try doing this:
Remember to replace username and password.
Best,
2010/6/30 Jeffrey Schneller
Here is the xml file I am getting:
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Esteban
Aliverti
Sent: Wednesday, June 30, 2010 3:18 PM
To: Rules Users List
Subject: Re: [rules-users] Drools and Guvnor 5.1M2 - Exception being
thrownin processChangeSet
Could you please post the xml file you are getting from
http://rulerserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.rul
e.package/LATEST/ChangeSet.xml
<http://rulerserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.ru
le.package/LATEST/ChangeSet.xml> ?
Best,
2010/6/30 Jeffrey Schneller
I am trying to upgrade to the 5.1M2 build from 5.0.1 and am running into
some issues. I have installed the new 5.1 Guvnor and imported the rules
from my 5.0.1 Guvnor instance.
I then removed the old 5.0.1 drools jars from my app and replaced them
with the 5.1M2 drools jars. I was also added all the dependent
libraries. The code that worked with the 5.0.1 version does not work
with the 5.1M2 version. In 5.0.1 I was constructing the xml and
streaming it into the applyChangeSet method. With 5.1M2 I am just
pointing to the change set xml file that is in the Guvnor.
I am seeing a NullPointerException being thrown in the processChangeSet
method as shown below.
Caused by: java.lang.NullPointerException
at
org.drools.agent.impl.KnowledgeAgentImpl.processChangeSet(KnowledgeAgent
Impl.java:171)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm
pl.java:143)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm
pl.java:130)
Did I miss something? Am I doing something wrong? Below is the code
that I have.
KnowledgeAgentConfiguration kaconf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
kaconf.setProperty( "drools.agent.scanDirectories",
"true" );
kaconf.setProperty("drools.agent.newInstance",
"false");
ResourceFactory.getResourceChangeScannerService().start();
ResourceFactory.getResourceChangeNotifierService().start();
String url =
"http://rulerserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.ru
le.package/LATEST/ChangeSet.xml";
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent( "Configuration", kaconf );
kagent.setSystemEventListener(new MyDroolsListener());
try {
kagent.applyChangeSet(ResourceFactory.newUrlResource(new URL(url)));
// ERROR IS OCCURING INSIDE OF applyChangeSet
} catch (MalformedURLException e) {
e.printStackTrace();
}
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--
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___
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--
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___
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https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools and Guvnor 5.1M2 - Exception being thrownin processChangeSet
Here is the xml file I am getting:
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Esteban
Aliverti
Sent: Wednesday, June 30, 2010 3:18 PM
To: Rules Users List
Subject: Re: [rules-users] Drools and Guvnor 5.1M2 - Exception being
thrownin processChangeSet
Could you please post the xml file you are getting from
http://rulerserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.rul
e.package/LATEST/ChangeSet.xml
<http://rulerserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.ru
le.package/LATEST/ChangeSet.xml> ?
Best,
2010/6/30 Jeffrey Schneller
I am trying to upgrade to the 5.1M2 build from 5.0.1 and am running into
some issues. I have installed the new 5.1 Guvnor and imported the rules
from my 5.0.1 Guvnor instance.
I then removed the old 5.0.1 drools jars from my app and replaced them
with the 5.1M2 drools jars. I was also added all the dependent
libraries. The code that worked with the 5.0.1 version does not work
with the 5.1M2 version. In 5.0.1 I was constructing the xml and
streaming it into the applyChangeSet method. With 5.1M2 I am just
pointing to the change set xml file that is in the Guvnor.
I am seeing a NullPointerException being thrown in the processChangeSet
method as shown below.
Caused by: java.lang.NullPointerException
at
org.drools.agent.impl.KnowledgeAgentImpl.processChangeSet(KnowledgeAgent
Impl.java:171)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm
pl.java:143)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm
pl.java:130)
Did I miss something? Am I doing something wrong? Below is the code
that I have.
KnowledgeAgentConfiguration kaconf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
kaconf.setProperty( "drools.agent.scanDirectories",
"true" );
kaconf.setProperty("drools.agent.newInstance",
"false");
ResourceFactory.getResourceChangeScannerService().start();
ResourceFactory.getResourceChangeNotifierService().start();
String url =
"http://rulerserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.ru
le.package/LATEST/ChangeSet.xml";
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent( "Configuration", kaconf );
kagent.setSystemEventListener(new MyDroolsListener());
try {
kagent.applyChangeSet(ResourceFactory.newUrlResource(new URL(url)));
// ERROR IS OCCURING INSIDE OF applyChangeSet
} catch (MalformedURLException e) {
e.printStackTrace();
}
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[rules-users] Drools and Guvnor 5.1M2 - Exception being thrown in processChangeSet
I am trying to upgrade to the 5.1M2 build from 5.0.1 and am running into
some issues. I have installed the new 5.1 Guvnor and imported the rules
from my 5.0.1 Guvnor instance.
I then removed the old 5.0.1 drools jars from my app and replaced them
with the 5.1M2 drools jars. I was also added all the dependent
libraries. The code that worked with the 5.0.1 version does not work
with the 5.1M2 version. In 5.0.1 I was constructing the xml and
streaming it into the applyChangeSet method. With 5.1M2 I am just
pointing to the change set xml file that is in the Guvnor.
I am seeing a NullPointerException being thrown in the processChangeSet
method as shown below.
Caused by: java.lang.NullPointerException
at
org.drools.agent.impl.KnowledgeAgentImpl.processChangeSet(KnowledgeAgent
Impl.java:171)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm
pl.java:143)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm
pl.java:130)
Did I miss something? Am I doing something wrong? Below is the code
that I have.
KnowledgeAgentConfiguration kaconf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
kaconf.setProperty( "drools.agent.scanDirectories",
"true" );
kaconf.setProperty("drools.agent.newInstance",
"false");
ResourceFactory.getResourceChangeScannerService().start();
ResourceFactory.getResourceChangeNotifierService().start();
String url =
"http://rulerserver/drools-guvnor/org.drools.guvnor.Guvnor/package/my.ru
le.package/LATEST/ChangeSet.xml";
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent( "Configuration", kaconf );
kagent.setSystemEventListener(new MyDroolsListener());
try {
kagent.applyChangeSet(ResourceFactory.newUrlResource(new URL(url)));
// ERROR IS OCCURING INSIDE OF applyChangeSet
} catch (MalformedURLException e) {
e.printStackTrace();
}
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Re: [rules-users] Rule Validation/Package Build Error in Guvnor: ClassNot Found
Your jar files [the models] need to be in the same drools package as
your DRL file.
So if in the Guvnor you have:
com.domain.project.rules
Business Rules
Your DRL file
Then you need to have the model in the same package.
com.domain.project.rules
Business Rules
Your DRL file
Models
Jar 1
Jar 2
Jar 3
The objects in each jar don't have to be in the com.domain.project.rules
package. They can be in any package. You do need to import the correct
objects in your DRL however. The package you specify in the Guvnor is
the package that the individual rules get compiled into.
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Ike Okafo
Sent: Monday, June 28, 2010 4:32 PM
To: rules-users@lists.jboss.org
Subject: [rules-users] Rule Validation/Package Build Error in Guvnor:
ClassNot Found
Hello,
I am new to Drools and have written a rule .DRL file which contains some
helper function imports from other packages, fact objects imports from
other packages and the rules that act on these facts. The file works
well
when I call it from my javacode using the rulebase or knowledgebase
approach.
The drl file itself is in its own package.
I now have a requirement to call the same rules from within Guvnor.
The goal is to enable business users modify these rules through the
Guvnor UI and also take advantage of the disable individual rules
feature within guvnor.
My current difficulty is importing and validating the rules in guvnor,
along with the associated fact jar files and finally interfacing
with guvnor from my code. Any help would be appreciated .
The main error happens when I try to build a binary package and create
a snapshot of the working rule file I imported for deployment.
When I hit the save and validate configuration button, I get
"class not found" validation errors for all the classes imported at
the top of the rule file - includingng the helper import functions
and facts used in the rules. Same thing happens when I try to
build the package I get the following errors
"Error importing: "
Here are the steps I followed in importing the rule file and Jar file
containing the classes
into Guvnor
(1) First within Guvnor I created a package corresponding to the package
path
for for each of the jar files whose classes are referenced/imported in
the rule .DRL file
(2) I created the jar files for each of these packages in eclipse
(3) Imported those jars individually into each of the packages created
in guvnor
using upload model jar function and selecting the appropriate path
as
created in step 1 2 above
(4) Imported the rule file which is in its own package - using the
create package (upload method)
(5) I then try to save and validate the imported rule file in step 5
(this is where the error occurs)
I have already setup my code to call guvnor as follows
RuleAgent agent = RuleAgent.newRuleAgent("guvnor.properties");
RuleBase masterRuleBase = agent.getRuleBase();
guvnor.properties contains only one entry
url =
http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/Som
ePackage.drools/LATEST
It is my understanding that after I import the rule file
I need to save and validate and build the package
in order to point the url to the path above. If I point the url to just
the drl file itself will it work?
i.e
url=http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package
/SomePackage.drools/LATEST.drl
Any help to resolve the class not found error will
be much appreciated
Thanks
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Re: [rules-users] OutOfMemoryError: GC overhead limit exceeded
Geoffrey, Thank you for your response and the link to the blog post. We are definitely on the large side for rules. Luckily though not 8GB worth [at least not yet]. Is 5.1 stable enough to run in a production environment? Thanks. -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Geoffrey De Smet Sent: Thursday, June 24, 2010 12:39 PM To: rules-users@lists.jboss.org Subject: Re: [rules-users] OutOfMemoryError: GC overhead limit exceeded An "OutOfMemoryError: GC overhead limit exceeded" issue was fixed for 5.1, see http://blog.athico.com/2010/03/drools-halves-memory-use-with-new-true.ht ml With kind regards, Geoffrey De Smet Jeffrey Schneller schreef: > I saw a similar thread about this back in March but I am now seeing a > similar exception being thrown. I am running 5.0.1. The error is > thrown in my app after the change set listener determines there was a > change with the rules package in the Guvnor. I have included the stack > trace from the most recent time the exception was thrown. Hopefully > someone can provide some additional information or a workaround. Has > this problem been fixed in 5.1? If so, has 5.1 moved out of M2 state > and into a CR state and when will it go into a full released state? > > > > Exception in thread "Thread-44" java.lang.OutOfMemoryError: GC overhead > limit exceeded > >at org.drools.rule.GroupElement.(GroupElement.java:44) > >at org.drools.rule.GroupElement.(GroupElement.java:47) > >at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown > Source) > >at > sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingCons tructorAccessorImpl.java:27) > >at java.lang.reflect.Constructor.newInstance(Constructor.java:513) > >at java.lang.Class.newInstance0(Class.java:355) > >at java.lang.Class.newInstance(Class.java:308) > >at org.drools.rule.GroupElement.clone(GroupElement.java:267) > >at org.drools.rule.GroupElement.clone(GroupElement.java:279) > >at org.drools.rule.Rule.getExtendedLhs(Rule.java:518) > >at org.drools.rule.Rule.getTransformedLhs(Rule.java:545) > >at > org.drools.reteoo.builder.ReteooRuleBuilder.addRule(ReteooRuleBuilder.ja va:98) > >at org.drools.reteoo.ReteooBuilder.addRule(ReteooBuilder.java:117) > >at org.drools.reteoo.ReteooRuleBase.addRule(ReteooRuleBase.java:362) > >at > org.drools.common.AbstractRuleBase.addRule(AbstractRuleBase.java:618) > >at > org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:500 ) > >at > org.drools.reteoo.ReteooRuleBase.addPackage(ReteooRuleBase.java:388) > >at > org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgent Impl.java:416) > >at > org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm pl.java:120) > >at > org.drools.agent.impl.KnowledgeAgentImpl$ChangeSetNotificationDetector.r un(KnowledgeAgentImpl.java:538) > >at java.lang.Thread.run(Thread.java:619) > > > > > > Thanks. > > > > > ___ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] OutOfMemoryError: GC overhead limit exceeded - RESEND
This is a RESEND because of mail server issues. Not sure if the original message went out. I saw a similar thread about this back in March but I am now seeing a similar exception being thrown. I am running 5.0.1. The error is thrown in my app after the change set listener determines there was a change with the rules package in the Guvnor. I have included the stack trace from the most recent time the exception was thrown. Hopefully someone can provide some additional information or a workaround. Has this problem been fixed in 5.1? If so, has 5.1 moved out of M2 state and into a CR state and when will it go into a full released state? Exception in thread "Thread-44" java.lang.OutOfMemoryError: GC overhead limit exceeded at org.drools.rule.GroupElement.(GroupElement.java:44) at org.drools.rule.GroupElement.(GroupElement.java:47) at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingCons tructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at java.lang.Class.newInstance0(Class.java:355) at java.lang.Class.newInstance(Class.java:308) at org.drools.rule.GroupElement.clone(GroupElement.java:267) at org.drools.rule.GroupElement.clone(GroupElement.java:279) at org.drools.rule.Rule.getExtendedLhs(Rule.java:518) at org.drools.rule.Rule.getTransformedLhs(Rule.java:545) at org.drools.reteoo.builder.ReteooRuleBuilder.addRule(ReteooRuleBuilder.ja va:98) at org.drools.reteoo.ReteooBuilder.addRule(ReteooBuilder.java:117) at org.drools.reteoo.ReteooRuleBase.addRule(ReteooRuleBase.java:362) at org.drools.common.AbstractRuleBase.addRule(AbstractRuleBase.java:618) at org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:500 ) at org.drools.reteoo.ReteooRuleBase.addPackage(ReteooRuleBase.java:388) at org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgent Impl.java:416) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm pl.java:120) at org.drools.agent.impl.KnowledgeAgentImpl$ChangeSetNotificationDetector.r un(KnowledgeAgentImpl.java:538) at java.lang.Thread.run(Thread.java:619) Thanks. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] OutOfMemoryError: GC overhead limit exceeded
I saw a similar thread about this back in March but I am now seeing a similar exception being thrown. I am running 5.0.1. The error is thrown in my app after the change set listener determines there was a change with the rules package in the Guvnor. I have included the stack trace from the most recent time the exception was thrown. Hopefully someone can provide some additional information or a workaround. Has this problem been fixed in 5.1? If so, has 5.1 moved out of M2 state and into a CR state and when will it go into a full released state? Exception in thread "Thread-44" java.lang.OutOfMemoryError: GC overhead limit exceeded at org.drools.rule.GroupElement.(GroupElement.java:44) at org.drools.rule.GroupElement.(GroupElement.java:47) at sun.reflect.GeneratedConstructorAccessor61.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingCons tructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at java.lang.Class.newInstance0(Class.java:355) at java.lang.Class.newInstance(Class.java:308) at org.drools.rule.GroupElement.clone(GroupElement.java:267) at org.drools.rule.GroupElement.clone(GroupElement.java:279) at org.drools.rule.Rule.getExtendedLhs(Rule.java:518) at org.drools.rule.Rule.getTransformedLhs(Rule.java:545) at org.drools.reteoo.builder.ReteooRuleBuilder.addRule(ReteooRuleBuilder.ja va:98) at org.drools.reteoo.ReteooBuilder.addRule(ReteooBuilder.java:117) at org.drools.reteoo.ReteooRuleBase.addRule(ReteooRuleBase.java:362) at org.drools.common.AbstractRuleBase.addRule(AbstractRuleBase.java:618) at org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:500 ) at org.drools.reteoo.ReteooRuleBase.addPackage(ReteooRuleBase.java:388) at org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgent Impl.java:416) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentIm pl.java:120) at org.drools.agent.impl.KnowledgeAgentImpl$ChangeSetNotificationDetector.r un(KnowledgeAgentImpl.java:538) at java.lang.Thread.run(Thread.java:619) Thanks. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] KnowledgeAgent
Can someone explain how to use the knowledge agent when the rules are stored on the guvnor. I also do not want to use an xml configuration file [change-set] to specify the url of the guvnor. The url is retrieved through the code in my case and I can't set it via a change-set since we don't know what the url is until runtime. Thanks. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] RuleBase Refresh
I am having issues refreshing my RuleBase. It works in some cases [small numbers of rules] and doesn't work in others. I am using the Guvnor to maintain rules and all my rules are in Excel decision table. To test, I created a simple package that contains 1 excel decision table which has 1 rule [row] in it. I ran my application. Then rebuilt the package in the Guvnor and my application refreshed the rule base correctly. Then in my actual application, I have other packages which contain many 100 rules if not 1000 rules all based on multiple excel based decision tables. If I run my application, then rebuild the package in the Guvnor, my application throws the exception. RuleAgent(Assembly) EXCEPTION (Fri Feb 26 12:02:32 EST 2010): java.lang.ClassCastException: org.drools.util.ObjectHashMap cannot be cast to org.drools.reteoo.BetaMemory. Stack trace should follow. org.drools.RuntimeDroolsException: java.lang.ClassCastException: org.drools.util.ObjectHashMap cannot be cast to org.drools.reteoo.BetaMemory It appears the problem occurs where there are many rules. Any ideas? This is going to be a major problem because the rules may need to be refreshed on a pretty regular basis and restarted the app each time is not an option. Thanks. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Refreshing RuleBase using the Guvnor
I posted about caching and after some more investigation it appears the problem lies in just refreshing the rulebase. I created a simple package that contains 1 excel decision table which has 1 rule [row] in it. I ran my application. Then rebuilt the package in the Guvnor and my application refreshed the rule base correctly. I have other packages which contain many 100 rules if not 1000 rules all based on multiple excel based decision tables. If I run my application, then rebuild the package in the Guvnor, my application throws the exception. RuleAgent(Assembly) EXCEPTION (Fri Feb 26 12:02:32 EST 2010): java.lang.ClassCastException: org.drools.util.ObjectHashMap cannot be cast to org.drools.reteoo.BetaMemory. Stack trace should follow. org.drools.RuntimeDroolsException: java.lang.ClassCastException: org.drools.util.ObjectHashMap cannot be cast to org.drools.reteoo.BetaMemory It appears the problem occurs where there are many rules. Any ideas? Thanks. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Refreshing Rule Base
I posted about caching and after some more investigation it appears the problem
lies in just refreshing the rulebase.
I created a simple package that contains 1 excel decision table which has 1
rule [row] in it. I ran my application. Then rebuilt the package in the
Guvnor and my application refreshed the rule base correctly.
I have other packages which contain many 100 rules if not 1000 rules all based
on multiple excel based decision tables. If I run my application, then rebuild
the package in the Guvnor, my application throws the exception.
RuleAgent(Assembly) EXCEPTION (Fri Feb 26 12:02:32 EST 2010):
java.lang.ClassCastException: org.drools.util.ObjectHashMap cannot be cast to
org.drools.reteoo.BetaMemory. Stack trace should follow.
org.drools.RuntimeDroolsException: java.lang.ClassCastException:
org.drools.util.ObjectHashMap cannot be cast to org.drools.reteoo.BetaMemory
It appears the problem occurs where there are many rules. Any ideas?
Thanks.
From: rules-users-boun...@lists.jboss.org on behalf of Jeffrey Schneller
Sent: Fri 2/26/2010 12:18 PM
To: rules-users@lists.jboss.org
Subject: [rules-users] Caching RuleBase
I saw some old thread about caching the rule base on your own. I have a
singleton which contains a hashmap to do the caching. I am using the Guvnor to
pull my rules from. This works fine except when the rules change on the
Guvnor. When the rule base tries to refresh in my application, I am getting a
ClassCastException. Any ideas?
RuleAgent(Assembly) EXCEPTION (Fri Feb 26 12:02:32 EST 2010):
java.lang.ClassCastException: org.drools.util.ObjectHashMap cannot be cast to
org.drools.reteoo.BetaMemory. Stack trace should follow.
org.drools.RuntimeDroolsException: java.lang.ClassCastException:
org.drools.util.ObjectHashMap cannot be cast to org.drools.reteoo.BetaMemory
My code to do the caching is below:
private HashMap ruleBaseMap = new HashMap();
// check to see if we already set up this rule base
if (ruleBaseMap.containsKey(product.getConfigurationRule())) {
rb = ruleBaseMap.get(product.getConfigurationRule());
} else {
try {
InitialContext context = new InitialContext();
url = (String) context.lookup("java:comp/env/rules.url");
url = url + product.getConfigurationRule() + "/LATEST";
} catch (NamingException e1) {
}
Properties config = new Properties();
config.setProperty("newInstance", "false");
config.setProperty("url", url);
config.setProperty("poll", "300");
config.setProperty("name", "Assembly");
RuleAgent agent = RuleAgent.newRuleAgent(config);
rb = agent.getRuleBase();
ruleBaseMap.put(product.getConfigurationRule(), rb);
}
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[rules-users] Caching RuleBase
I saw some old thread about caching the rule base on your own. I have a
singleton which contains a hashmap to do the caching. I am using the Guvnor to
pull my rules from. This works fine except when the rules change on the
Guvnor. When the rule base tries to refresh in my application, I am getting a
ClassCastException. Any ideas?
RuleAgent(Assembly) EXCEPTION (Fri Feb 26 12:02:32 EST 2010):
java.lang.ClassCastException: org.drools.util.ObjectHashMap cannot be cast to
org.drools.reteoo.BetaMemory. Stack trace should follow.
org.drools.RuntimeDroolsException: java.lang.ClassCastException:
org.drools.util.ObjectHashMap cannot be cast to org.drools.reteoo.BetaMemory
My code to do the caching is below:
private HashMap ruleBaseMap = new HashMap();
// check to see if we already set up this rule base
if (ruleBaseMap.containsKey(product.getConfigurationRule())) {
rb = ruleBaseMap.get(product.getConfigurationRule());
} else {
try {
InitialContext context = new InitialContext();
url = (String) context.lookup("java:comp/env/rules.url");
url = url + product.getConfigurationRule() + "/LATEST";
} catch (NamingException e1) {
}
Properties config = new Properties();
config.setProperty("newInstance", "false");
config.setProperty("url", url);
config.setProperty("poll", "300");
config.setProperty("name", "Assembly");
RuleAgent agent = RuleAgent.newRuleAgent(config);
rb = agent.getRuleBase();
ruleBaseMap.put(product.getConfigurationRule(), rb);
}
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Re: [rules-users] Using Collections in LHS
I think what you are looking for is the following. Someone please
correct me if I am incorrect.
when
Order($discount : discount > 10, $items: items)
Item(grade > 3) from $items
then
System.err.print("Discount is not allowed with items having grade 3 or
higher");
This would fire when an Order has a discount greater than 10 and an
item with a grade greater than 3.
Not sure why you even need the $discount variable. You could just do
Order(discount > 10, $items : items) for the first line of the when
clause.
From: rules-users-boun...@lists.jboss.org
[mailto:rules-users-boun...@lists.jboss.org] On Behalf Of Shabbir Dhari
Sent: Tuesday, February 23, 2010 5:27 PM
To: rules-users@lists.jboss.org
Subject: Re: [rules-users] Using Collections in LHS
Hi W
I know about case sensitivity issue. How can I combine both Order and
Item in one condition. I tried all possibilities but getting syntax
error.
For example:
Order ($items : items, $discount : discount > 10, Item(grade > 3) from
$items) // gives error
Can please code this condition correctly for me?
Dhari
Date: Tue, 23 Feb 2010 13:43:01 +0100
From: wolfgang.l...@gmail.com
To: rules-users@lists.jboss.org
Subject: Re: [rules-users] Using Collections in LHS
Discount is a field of Order and must not appear in an Item(...).
Probably you want:
Order ( $discount : Discount > 10,...
Also, most likely, all your fields need to be written with a lower case
initial letter,
Order ( $discount : discount > 10, $items : items)
-W
On Tue, Feb 23, 2010 at 1:11 PM, dhari wrote:
In this scenario I do have typical Order and Items data structure. I
want to
implement various business rules where I want to check both Order
attributes
and Item attributes together.
Order [ Date, Discount, Amount, Customer, Type, Items]
Item [ Quantity, Rate, ExpiresDate, Grade ]
I am trying to implements following rules but all gives me syntax error.
I
wondering if someone can help me in.
rule one
when
Order ( $discount : Discount, $items : Items)
Item ($discount > 10 && Grade > 3) from $items
then
System.err.print(Discount is not allowed with items having grade
3 or
higher)
end
rule two
when
Order ( $discount : Discount, $items : Items)
Item ($discount > 20 || Quantity < 5 ) from $items
then
//do some thinge
end
--
View this message in context:
http://n3.nabble.com/Using-Collections-in-LHS-tp386923p386923.html
Sent from the Drools - User mailing list archive at Nabble.com.
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[rules-users] Rule in decision table
I am trying to write a condition for a decision table and can't seem to figure out how to do it. I have a global variable called area. This is in sq. ft. I have a fact called Item which has an attribute called weight. This is in grams / sq. ft. The Item comes from the attribute called value from a fact named Choice where the sku attribute matches what is in the rule I want to compare the (weight * area) to the parameter for the row. The parameter is being passed in as lbs. Here is what I tried for my three condition columns: CONDITION CONDITION CONDITION mm : Choice sku exists(Item(weight * area > ($param * 453.5924)) from mm.value) exists(Item(weight * area <= ($param * 453.5924)) from mm.value) This did not work. This will work if I remove the formula and just do something like exists(Item(weight > $param) from mm.value). So the syntax is correct except for the comparison that I want to do. Any ideas on how to do this? Thanks. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Creating excel decision tables
How would you create something similar the below rules in a decision
table. The value of the ChoiceOption is actually an Interface which
OptionValue and ItemValue bath implement. Any ideas?
Thanks.
rule 'test'
dialect 'mvel'
when
$o : ChoiceOption(sku=="mount")
OptionValue(value == "inside") from $o.value
then
log("works");
end
rule 'test2'
dialect 'mvel'
when
$o : ChoiceOption(sku=="opt3")
ItemValue(value == "123") from $o.value
then
log("works");
end
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