1:47 p.m.
Using RuleBase in multithread application server environment
------------------------------------------------------------
Key: JBRULES-1330
URL: http://jira.jboss.com/jira/browse/JBRULES-1330
Project: JBoss Drools
Issue Type: Bug
Security Level: Public (Everyone can see)
Components: Rule Flow
Affects Versions: 4.0.3
Environment: Red Hat Linux as OS, weblogic 9.2 using jrockit-1.5.0_10
Reporter: Navaljit Bhasin
We are deploying an applcation which has one major component which executes rules.
At the startup of the application server, we load the various rules and save them in a
hashmap with appropriate key. The value of these HashMaps is RuleBase. This is part of a
singleton service.
The applcation is based on JMS. A MDB receives message, calls the sigleton service to get
stateful session from a specific RuleBase ( saved in HashMap by key as mentioned above).
This singleton service get the RuleBase from Map, call newStatefulSession(false) on this
RuleBase object and return the new StatefulSession.
This works fine as long as we have one MDB on the application server. When we increase the
number of MDB's to more than one, and both MDB's process the messages( different
messages) simultaneously, the results from stateful session rule firing are messed up. It
skips amny valid LHS and so on.
I even tried using the Stateless Session, but the results are still messed up. So my
question is:
Can we use the Rulebase in multithreaded environment ? My understanding was that we can
use it. There should be no interaction between various stateful sessions received from
same rulebase object. If we can't use it this way, the we have build it form
PackageBuilder for every invocation. There are lots of complex rules and for hundreds of
calls it adds up to considerable waste of resources.
Thanks for reading this bug report
Can you please post or email me the code to use the statefule sessions from a RuleBase
object in multithreaded environment?
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10:01 a.m.
New subject: [JBoss JIRA] Assigned: (JBRULES-1330) Using RuleBase in multithread application server environment
[ http://jira.jboss.com/jira/browse/JBRULES-1330?page=all ]
Edson Tirelli reassigned JBRULES-1330:
--------------------------------------
Assignee: Edson Tirelli
Using RuleBase in multithread application server environment
------------------------------------------------------------
Key: JBRULES-1330
URL: http://jira.jboss.com/jira/browse/JBRULES-1330
Project: JBoss Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Rule Flow
Affects Versions: 4.0.3
Environment: Red Hat Linux as OS, weblogic 9.2 using jrockit-1.5.0_10
Reporter: Navaljit Bhasin
Assigned To: Edson Tirelli
We are deploying an applcation which has one major component which executes rules.
At the startup of the application server, we load the various rules and save them in a
hashmap with appropriate key. The value of these HashMaps is RuleBase. This is part of a
singleton service.
The applcation is based on JMS. A MDB receives message, calls the sigleton service to get
stateful session from a specific RuleBase ( saved in HashMap by key as mentioned above).
This singleton service get the RuleBase from Map, call newStatefulSession(false) on this
RuleBase object and return the new StatefulSession.
This works fine as long as we have one MDB on the application server. When we increase
the number of MDB's to more than one, and both MDB's process the messages(
different messages) simultaneously, the results from stateful session rule firing are
messed up. It skips amny valid LHS and so on.
I even tried using the Stateless Session, but the results are still messed up. So my
question is:
Can we use the Rulebase in multithreaded environment ? My understanding was that we can
use it. There should be no interaction between various stateful sessions received from
same rulebase object. If we can't use it this way, the we have build it form
PackageBuilder for every invocation. There are lots of complex rules and for hundreds of
calls it adds up to considerable waste of resources.
Thanks for reading this bug report
Can you please post or email me the code to use the statefule sessions from a RuleBase
object in multithreaded environment?
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10:03 a.m.
New subject: [JBoss JIRA] Closed: (JBRULES-1330) Using RuleBase in multithread application server environment
[ http://jira.jboss.com/jira/browse/JBRULES-1330?page=all ]
Edson Tirelli closed JBRULES-1330.
----------------------------------
Fix Version/s: 4.0.5
5.0.0-M1
Resolution: Done
This issue was fixed through it's related tickets: JBRULES-1392 and JBRULES-1467.
Let us know please if you still have concurrency problems after these fixes.
Using RuleBase in multithread application server environment
------------------------------------------------------------
Key: JBRULES-1330
URL: http://jira.jboss.com/jira/browse/JBRULES-1330
Project: JBoss Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Rule Flow
Affects Versions: 4.0.3
Environment: Red Hat Linux as OS, weblogic 9.2 using jrockit-1.5.0_10
Reporter: Navaljit Bhasin
Assigned To: Edson Tirelli
Fix For: 4.0.5, 5.0.0-M1
We are deploying an applcation which has one major component which executes rules.
At the startup of the application server, we load the various rules and save them in a
hashmap with appropriate key. The value of these HashMaps is RuleBase. This is part of a
singleton service.
The applcation is based on JMS. A MDB receives message, calls the sigleton service to get
stateful session from a specific RuleBase ( saved in HashMap by key as mentioned above).
This singleton service get the RuleBase from Map, call newStatefulSession(false) on this
RuleBase object and return the new StatefulSession.
This works fine as long as we have one MDB on the application server. When we increase
the number of MDB's to more than one, and both MDB's process the messages(
different messages) simultaneously, the results from stateful session rule firing are
messed up. It skips amny valid LHS and so on.
I even tried using the Stateless Session, but the results are still messed up. So my
question is:
Can we use the Rulebase in multithreaded environment ? My understanding was that we can
use it. There should be no interaction between various stateful sessions received from
same rulebase object. If we can't use it this way, the we have build it form
PackageBuilder for every invocation. There are lots of complex rules and for hundreds of
calls it adds up to considerable waste of resources.
Thanks for reading this bug report
Can you please post or email me the code to use the statefule sessions from a RuleBase
object in multithreaded environment?
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3:01 p.m.
New subject: [JBoss JIRA] Reopened: (JBRULES-1330) Using RuleBase in multithread application server environment
[ http://jira.jboss.com/jira/browse/JBRULES-1330?page=all ]
Navaljit Bhasin reopened JBRULES-1330:
--------------------------------------
Edson,
I am trying to replicate the issue outside the weblogic server environement. This will
help me isolate problem ( ie is it die to some classloading in weblogic or some issue wth
rules)
I created a simple test case.
I am attaching code I used for this test. used the 4.0.x.SNAPSHOT.jar files,
It runs fine on windows, but on linux the drl file is throwing compile exception.
The version 4.03 jar files run fine with this code on linux.
I am getting following error.
ant compile run-dst:
[java] JVM args ignored when same JVM is used.
[java] INFO 19-02 15:37:02,185 (TestRulesMT.java:getSpreadsheetStream:120)
Got Input Stream:true
[java] org.mvel.CompileException: Failed to compile:
[java] [Error: can not resolve identifier: name]
[java] [Near: { ... nam ... } ]
Using RuleBase in multithread application server environment
------------------------------------------------------------
Key: JBRULES-1330
URL: http://jira.jboss.com/jira/browse/JBRULES-1330
Project: JBoss Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Rule Flow
Affects Versions: 4.0.3
Environment: Red Hat Linux as OS, weblogic 9.2 using jrockit-1.5.0_10
Reporter: Navaljit Bhasin
Assigned To: Edson Tirelli
Fix For: 5.0.0-M1, 4.0.5
We are deploying an applcation which has one major component which executes rules.
At the startup of the application server, we load the various rules and save them in a
hashmap with appropriate key. The value of these HashMaps is RuleBase. This is part of a
singleton service.
The applcation is based on JMS. A MDB receives message, calls the sigleton service to get
stateful session from a specific RuleBase ( saved in HashMap by key as mentioned above).
This singleton service get the RuleBase from Map, call newStatefulSession(false) on this
RuleBase object and return the new StatefulSession.
This works fine as long as we have one MDB on the application server. When we increase
the number of MDB's to more than one, and both MDB's process the messages(
different messages) simultaneously, the results from stateful session rule firing are
messed up. It skips amny valid LHS and so on.
I even tried using the Stateless Session, but the results are still messed up. So my
question is:
Can we use the Rulebase in multithreaded environment ? My understanding was that we can
use it. There should be no interaction between various stateful sessions received from
same rulebase object. If we can't use it this way, the we have build it form
PackageBuilder for every invocation. There are lots of complex rules and for hundreds of
calls it adds up to considerable waste of resources.
Thanks for reading this bug report
Can you please post or email me the code to use the statefule sessions from a RuleBase
object in multithreaded environment?
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3:03 p.m.
New subject: [JBoss JIRA] Updated: (JBRULES-1330) Using RuleBase in multithread application server environment
[ http://jira.jboss.com/jira/browse/JBRULES-1330?page=all ]
Navaljit Bhasin updated JBRULES-1330:
-------------------------------------
Attachment: log.txt
Using RuleBase in multithread application server environment
------------------------------------------------------------
Key: JBRULES-1330
URL: http://jira.jboss.com/jira/browse/JBRULES-1330
Project: JBoss Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Rule Flow
Affects Versions: 4.0.3
Environment: Red Hat Linux as OS, weblogic 9.2 using jrockit-1.5.0_10
Reporter: Navaljit Bhasin
Assigned To: Edson Tirelli
Fix For: 5.0.0-M1, 4.0.5
Attachments: Droolsmt.zip, log.txt
We are deploying an applcation which has one major component which executes rules.
At the startup of the application server, we load the various rules and save them in a
hashmap with appropriate key. The value of these HashMaps is RuleBase. This is part of a
singleton service.
The applcation is based on JMS. A MDB receives message, calls the sigleton service to get
stateful session from a specific RuleBase ( saved in HashMap by key as mentioned above).
This singleton service get the RuleBase from Map, call newStatefulSession(false) on this
RuleBase object and return the new StatefulSession.
This works fine as long as we have one MDB on the application server. When we increase
the number of MDB's to more than one, and both MDB's process the messages(
different messages) simultaneously, the results from stateful session rule firing are
messed up. It skips amny valid LHS and so on.
I even tried using the Stateless Session, but the results are still messed up. So my
question is:
Can we use the Rulebase in multithreaded environment ? My understanding was that we can
use it. There should be no interaction between various stateful sessions received from
same rulebase object. If we can't use it this way, the we have build it form
PackageBuilder for every invocation. There are lots of complex rules and for hundreds of
calls it adds up to considerable waste of resources.
Thanks for reading this bug report
Can you please post or email me the code to use the statefule sessions from a RuleBase
object in multithreaded environment?
--
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3:03 p.m.
New subject: [JBoss JIRA] Updated: (JBRULES-1330) Using RuleBase in multithread application server environment
[ http://jira.jboss.com/jira/browse/JBRULES-1330?page=all ]
Navaljit Bhasin updated JBRULES-1330:
-------------------------------------
Attachment: Droolsmt.zip
Using RuleBase in multithread application server environment
------------------------------------------------------------
Key: JBRULES-1330
URL: http://jira.jboss.com/jira/browse/JBRULES-1330
Project: JBoss Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Rule Flow
Affects Versions: 4.0.3
Environment: Red Hat Linux as OS, weblogic 9.2 using jrockit-1.5.0_10
Reporter: Navaljit Bhasin
Assigned To: Edson Tirelli
Fix For: 5.0.0-M1, 4.0.5
Attachments: Droolsmt.zip, log.txt
We are deploying an applcation which has one major component which executes rules.
At the startup of the application server, we load the various rules and save them in a
hashmap with appropriate key. The value of these HashMaps is RuleBase. This is part of a
singleton service.
The applcation is based on JMS. A MDB receives message, calls the sigleton service to get
stateful session from a specific RuleBase ( saved in HashMap by key as mentioned above).
This singleton service get the RuleBase from Map, call newStatefulSession(false) on this
RuleBase object and return the new StatefulSession.
This works fine as long as we have one MDB on the application server. When we increase
the number of MDB's to more than one, and both MDB's process the messages(
different messages) simultaneously, the results from stateful session rule firing are
messed up. It skips amny valid LHS and so on.
I even tried using the Stateless Session, but the results are still messed up. So my
question is:
Can we use the Rulebase in multithreaded environment ? My understanding was that we can
use it. There should be no interaction between various stateful sessions received from
same rulebase object. If we can't use it this way, the we have build it form
PackageBuilder for every invocation. There are lots of complex rules and for hundreds of
calls it adds up to considerable waste of resources.
Thanks for reading this bug report
Can you please post or email me the code to use the statefule sessions from a RuleBase
object in multithreaded environment?
--
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-
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10:59 a.m.
New subject: [JBoss JIRA] Commented: (JBRULES-1330) Using RuleBase in multithread application server environment
[ http://jira.jboss.com/jira/browse/JBRULES-1330?page=comments#action_12400060 ]
Edson Tirelli commented on JBRULES-1330:
----------------------------------------
Navaljit
Does this error occur intermittently?
I'm running your example here on a Fedora Linux dual-core machine and I'm not able
to reproduce the problem. It works fine for me every single time. I'm using the
following jars:
[etirelli@localhost jira-1330]$ ls -la lib/
total 7688
drwxrwxr-x 2 etirelli etirelli 4096 Feb 20 13:44 .
drwxrwxr-x 5 etirelli etirelli 4096 Feb 20 13:42 ..
-rw-rw-r-- 1 etirelli etirelli 92015 Feb 20 13:41 antlr-runtime-3.0.jar
-rw-rw-r-- 1 etirelli etirelli 4014911 Feb 20 13:41 core-3.2.3.v_686_R32x.jar
-rw-rw-r-- 1 etirelli etirelli 557617 Feb 20 13:40 drools-compiler-4.0.x.SNAPSHOT.jar
-rw-rw-r-- 1 etirelli etirelli 1086185 Feb 20 13:40 drools-core-4.0.x.SNAPSHOT.jar
-rw-rw-r-- 1 etirelli etirelli 78217 Feb 20 13:42
drools-decisiontables-4.0.x.SNAPSHOT.jar
-rw-r--r-- 1 etirelli etirelli 499068 Feb 20 13:44 jxl-2.4.2.jar
-rw-rw-r-- 1 etirelli etirelli 367444 Feb 20 13:42 log4j-1.2.14.jar
-rw-rw-r-- 1 etirelli etirelli 1117312 Feb 20 13:40 mvel14-1.2.21.jar
[etirelli@localhost jira-1330]$
Can we double check you are using the same jar versions?
What I will do now is, based on the exception stack trace you provided, try to create a
test that will stress that specific part of the code. Meanwhile, if you have any
additional info on how to reproduce, please add to this ticket.
Thanks,
Edson
Using RuleBase in multithread application server environment
------------------------------------------------------------
Key: JBRULES-1330
URL: http://jira.jboss.com/jira/browse/JBRULES-1330
Project: JBoss Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Rule Flow
Affects Versions: 4.0.3
Environment: Red Hat Linux as OS, weblogic 9.2 using jrockit-1.5.0_10
Reporter: Navaljit Bhasin
Assigned To: Edson Tirelli
Fix For: 5.0.0-M1, 4.0.5
Attachments: Droolsmt.zip, log.txt
We are deploying an applcation which has one major component which executes rules.
At the startup of the application server, we load the various rules and save them in a
hashmap with appropriate key. The value of these HashMaps is RuleBase. This is part of a
singleton service.
The applcation is based on JMS. A MDB receives message, calls the sigleton service to get
stateful session from a specific RuleBase ( saved in HashMap by key as mentioned above).
This singleton service get the RuleBase from Map, call newStatefulSession(false) on this
RuleBase object and return the new StatefulSession.
This works fine as long as we have one MDB on the application server. When we increase
the number of MDB's to more than one, and both MDB's process the messages(
different messages) simultaneously, the results from stateful session rule firing are
messed up. It skips amny valid LHS and so on.
I even tried using the Stateless Session, but the results are still messed up. So my
question is:
Can we use the Rulebase in multithreaded environment ? My understanding was that we can
use it. There should be no interaction between various stateful sessions received from
same rulebase object. If we can't use it this way, the we have build it form
PackageBuilder for every invocation. There are lots of complex rules and for hundreds of
calls it adds up to considerable waste of resources.
Thanks for reading this bug report
Can you please post or email me the code to use the statefule sessions from a RuleBase
object in multithreaded environment?
--
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3:39 p.m.
New subject: [JBoss JIRA] Commented: (JBRULES-1330) Using RuleBase in multithread application server environment
[ http://jira.jboss.com/jira/browse/JBRULES-1330?page=comments#action_12400096 ]
Edson Tirelli commented on JBRULES-1330:
----------------------------------------
Ok, I was able to reproduce the problem you mentioned when I used the wrong MVEL version.
When I switched to MVEL 1.2.20, I got the same exception you had:
[etirelli@localhost jira-1330]$ cp
~/.m2/repository/org/mvel/mvel14/1.2.20/mvel14-1.2.20.jar lib
[etirelli@localhost jira-1330]$ mv lib/mvel14-1.2.21.jar .
[etirelli@localhost jira-1330]$ ant run-dst
Buildfile: build.xml
run-dst:
[java] JVM args ignored when same JVM is used.
[java] INFO : 2008-02-20 18:35:00,916 ruleslog:120 Got Input Stream:true
[java] org.mvel.CompileException: can not resolve identifier: name
[java] at
org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:180)
[java] at org.apache.tools.ant.taskdefs.Java.run(Java.java:710)
[java] at org.apache.tools.ant.taskdefs.Java.executeJava(Java.java:178)
[java] at org.apache.tools.ant.taskdefs.Java.execute(Java.java:84)
[java] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
[java] at org.apache.tools.ant.Task.perform(Task.java:364)
[java] at org.apache.tools.ant.Target.execute(Target.java:341)
[java] at org.apache.tools.ant.Target.performTasks(Target.java:369)
[java] at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1216)
[java] at org.apache.tools.ant.Project.executeTarget(Project.java:1185)
[java] at
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:40)
[java] at org.apache.tools.ant.Project.executeTargets(Project.java:1068)
[java] at org.apache.tools.ant.Main.runBuild(Main.java:668)
[java] at org.apache.tools.ant.Main.startAnt(Main.java:187)
[java] at org.apache.tools.ant.launch.Launcher.run(Launcher.java:246)
[java] at org.apache.tools.ant.launch.Launcher.main(Launcher.java:67)
[java] Caused by: org.mvel.CompileException: can not resolve identifier: name
[java] at org.mvel.ASTNode.getReducedValue(ASTNode.java:315)
[java] at org.mvel.ast.PropertyASTNode.getReducedValue(PropertyASTNode.java:34)
[java] at
org.mvel.MVELInterpretedRuntime.parseAndExecuteInterpreted(MVELInterpretedRuntime.java:115)
[java] at org.mvel.MVELInterpretedRuntime.parse(MVELInterpretedRuntime.java:63)
[java] at org.mvel.TemplateInterpreter.execute(TemplateInterpreter.java:409)
[java] at org.mvel.TemplateInterpreter.execute(TemplateInterpreter.java:342)
[java] at org.mvel.TemplateInterpreter.eval(TemplateInterpreter.java:108)
[java] at org.mvel.TemplateInterpreter.evalToString(TemplateInterpreter.java:73)
[java] at
org.drools.rule.builder.dialect.java.JavaFunctionBuilder.build(JavaFunctionBuilder.java:96)
[java] at
org.drools.rule.builder.dialect.java.JavaDialect.addFunction(JavaDialect.java:436)
[java] at
org.drools.compiler.PackageBuilder.addFunction(PackageBuilder.java:406)
[java] at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:289)
[java] at
org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:167)
[java] at com.test.drools.TestRulesMT.buildRuleBase(TestRulesMT.java:109)
[java] at com.test.drools.TestRulesMT.main(TestRulesMT.java:34)
[java] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[java] at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[java] at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[java] at java.lang.reflect.Method.invoke(Method.java:585)
[java] at org.apache.tools.ant.taskdefs.ExecuteJava.run(ExecuteJava.java:202)
[java] at
org.apache.tools.ant.taskdefs.ExecuteJava.execute(ExecuteJava.java:134)
[java] ... 15 more
Please make sure you are using MVEL 1.2.21.
I'm closing this ticket. If you still has problems with MVEL 1.2.21, plz re-open the
ticket and provide any additional info you may have.
Thanks,
Edson
Using RuleBase in multithread application server environment
------------------------------------------------------------
Key: JBRULES-1330
URL: http://jira.jboss.com/jira/browse/JBRULES-1330
Project: JBoss Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Rule Flow
Affects Versions: 4.0.3
Environment: Red Hat Linux as OS, weblogic 9.2 using jrockit-1.5.0_10
Reporter: Navaljit Bhasin
Assigned To: Edson Tirelli
Fix For: 5.0.0-M1, 4.0.5
Attachments: Droolsmt.zip, log.txt
We are deploying an applcation which has one major component which executes rules.
At the startup of the application server, we load the various rules and save them in a
hashmap with appropriate key. The value of these HashMaps is RuleBase. This is part of a
singleton service.
The applcation is based on JMS. A MDB receives message, calls the sigleton service to get
stateful session from a specific RuleBase ( saved in HashMap by key as mentioned above).
This singleton service get the RuleBase from Map, call newStatefulSession(false) on this
RuleBase object and return the new StatefulSession.
This works fine as long as we have one MDB on the application server. When we increase
the number of MDB's to more than one, and both MDB's process the messages(
different messages) simultaneously, the results from stateful session rule firing are
messed up. It skips amny valid LHS and so on.
I even tried using the Stateless Session, but the results are still messed up. So my
question is:
Can we use the Rulebase in multithreaded environment ? My understanding was that we can
use it. There should be no interaction between various stateful sessions received from
same rulebase object. If we can't use it this way, the we have build it form
PackageBuilder for every invocation. There are lots of complex rules and for hundreds of
calls it adds up to considerable waste of resources.
Thanks for reading this bug report
Can you please post or email me the code to use the statefule sessions from a RuleBase
object in multithreaded environment?
--
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3:39 p.m.
New subject: [JBoss JIRA] Closed: (JBRULES-1330) Using RuleBase in multithread application server environment
[ http://jira.jboss.com/jira/browse/JBRULES-1330?page=all ]
Edson Tirelli closed JBRULES-1330.
----------------------------------
Resolution: Done
Using RuleBase in multithread application server environment
------------------------------------------------------------
Key: JBRULES-1330
URL: http://jira.jboss.com/jira/browse/JBRULES-1330
Project: JBoss Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Rule Flow
Affects Versions: 4.0.3
Environment: Red Hat Linux as OS, weblogic 9.2 using jrockit-1.5.0_10
Reporter: Navaljit Bhasin
Assigned To: Edson Tirelli
Fix For: 4.0.5, 5.0.0-M1
Attachments: Droolsmt.zip, log.txt
We are deploying an applcation which has one major component which executes rules.
At the startup of the application server, we load the various rules and save them in a
hashmap with appropriate key. The value of these HashMaps is RuleBase. This is part of a
singleton service.
The applcation is based on JMS. A MDB receives message, calls the sigleton service to get
stateful session from a specific RuleBase ( saved in HashMap by key as mentioned above).
This singleton service get the RuleBase from Map, call newStatefulSession(false) on this
RuleBase object and return the new StatefulSession.
This works fine as long as we have one MDB on the application server. When we increase
the number of MDB's to more than one, and both MDB's process the messages(
different messages) simultaneously, the results from stateful session rule firing are
messed up. It skips amny valid LHS and so on.
I even tried using the Stateless Session, but the results are still messed up. So my
question is:
Can we use the Rulebase in multithreaded environment ? My understanding was that we can
use it. There should be no interaction between various stateful sessions received from
same rulebase object. If we can't use it this way, the we have build it form
PackageBuilder for every invocation. There are lots of complex rules and for hundreds of
calls it adds up to considerable waste of resources.
Thanks for reading this bug report
Can you please post or email me the code to use the statefule sessions from a RuleBase
object in multithreaded environment?
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8:14 p.m.
New subject: [JBoss JIRA] Commented: (JBRULES-1330) Using RuleBase in multithread application server environment
[ http://jira.jboss.com/jira/browse/JBRULES-1330?page=comments#action_12400388 ]
Navaljit Bhasin commented on JBRULES-1330:
------------------------------------------
Thanks Edson.
We have tested it on our environment. Don't see any issues so far.
I truly appreciate your help.
We are working on subscribing the commercial support from JBoss and getting Drools
consultant for a few days.
-Nav
Using RuleBase in multithread application server environment
------------------------------------------------------------
Key: JBRULES-1330
URL: http://jira.jboss.com/jira/browse/JBRULES-1330
Project: JBoss Drools
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Rule Flow
Affects Versions: 4.0.3
Environment: Red Hat Linux as OS, weblogic 9.2 using jrockit-1.5.0_10
Reporter: Navaljit Bhasin
Assigned To: Edson Tirelli
Fix For: 5.0.0-M1, 4.0.5
Attachments: Droolsmt.zip, log.txt
We are deploying an applcation which has one major component which executes rules.
At the startup of the application server, we load the various rules and save them in a
hashmap with appropriate key. The value of these HashMaps is RuleBase. This is part of a
singleton service.
The applcation is based on JMS. A MDB receives message, calls the sigleton service to get
stateful session from a specific RuleBase ( saved in HashMap by key as mentioned above).
This singleton service get the RuleBase from Map, call newStatefulSession(false) on this
RuleBase object and return the new StatefulSession.
This works fine as long as we have one MDB on the application server. When we increase
the number of MDB's to more than one, and both MDB's process the messages(
different messages) simultaneously, the results from stateful session rule firing are
messed up. It skips amny valid LHS and so on.
I even tried using the Stateless Session, but the results are still messed up. So my
question is:
Can we use the Rulebase in multithreaded environment ? My understanding was that we can
use it. There should be no interaction between various stateful sessions received from
same rulebase object. If we can't use it this way, the we have build it form
PackageBuilder for every invocation. There are lots of complex rules and for hundreds of
calls it adds up to considerable waste of resources.
Thanks for reading this bug report
Can you please post or email me the code to use the statefule sessions from a RuleBase
object in multithreaded environment?
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6167
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6266
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9 comments
2 participants
participants (2)
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Edson Tirelli (JIRA) -
Navaljit Bhasin (JIRA)