3:33 a.m.
Hello everyone,
I'm struggling with the following error after updating from Drools 5.1M1 to
5.3Final when handing over a URLClassloader as a parameter for
RuleBaseConfiguration. The URL of the classLoader points to Jar file
containing the facts.
ERROR JobRunShell - Job TIQRULES_PROJECT4.TIQRULES_PROJECT4 threw an
unhandled Exception:
java.lang.NoSuchMethodError:
org.drools.RuleBaseConfiguration.<init>([Ljava/lang/ClassLoader;)V
at
de.tiq.rules.drools.DroolsEngine.createKnowledgeBase(DroolsEngine.java:263)
at
de.tiq.rules.drools.DroolsEngine.run(DroolsEngine.java:95)
at
de.tiq.rules.TIQRulesEngine.executeRuleResource(TIQRulesEngine.java:178)
at
de.tiq.quartz.QuartzTaskExecutor.execute(QuartzTaskExecutor.java:173)
at org.quartz.core.JobRunShell.run(JobRunShell.java:199)
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:546)
ERROR ErrorLogger - Job (TIQRULES_PROJECT4.TIQRULES_PROJECT4 threw an
exception.
org.quartz.SchedulerException: Job threw an unhandled exception. [See nested
exception: java.lang.NoSuchMethodError:
org.drools.RuleBaseConfiguration.<init>([Ljava/lang/ClassLoader;)V]
at org.quartz.core.JobRunShell.run(JobRunShell.java:210)
at
org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:546)
Caused by: java.lang.NoSuchMethodError:
org.drools.RuleBaseConfiguration.<init>([Ljava/lang/ClassLoader;)V
at
de.tiq.rules.drools.DroolsEngine.createKnowledgeBase(DroolsEngine.java:263)
at
de.tiq.rules.drools.DroolsEngine.run(DroolsEngine.java:95)
at
de.tiq.rules.TIQRulesEngine.executeRuleResource(TIQRulesEngine.java:178)
at
de.tiq.quartz.QuartzTaskExecutor.execute(QuartzTaskExecutor.java:173)
at org.quartz.core.JobRunShell.run(JobRunShell.java:199)
This is the part of the code where the ClassLoader is given as a parameter:
/**
* create a knowledge base of a given rule resource
*
* @param ruleResource
* the rule resource
* @return the created knowledge base
*/
private KnowledgeBase createKnowledgeBase(IRuleResource
ruleResource) {
if (ruleResource == null) {
throw new
NullPointerException("ruleResource is null");
}
KnowledgeBase kbase;
ClassLoader[] arrayOfClassLoaders = new
ClassLoader[1];
arrayOfClassLoaders[0] =
currProject.getFactsClassLoader();
final KnowledgeBaseConfiguration kbaseconfig
= new RuleBaseConfiguration(currProject.getFactsClassLoader());
kbase =
KnowledgeBaseFactory.newKnowledgeBase(kbaseconfig);
kbase.addKnowledgePackages(ruleResource.getKnowledgePackages(kbase));
return kbase;
}
This is what getFactsClassLoader does:
public ClassLoader getFactsClassLoader() {
try {
if (factsClassLoader == null) {
URL jarURL;
jarURL = getExecuteJarFile().toURI().toURL();
factsClassLoader = new URLClassLoader(new URL[] { jarURL },
Thread.currentThread()
.getContextClassLoader());
}
return factsClassLoader;
} catch (final MalformedURLException e) {
throw new RuntimeException(e);
}
}
Thx in advance for any hint on solving the mentioned problem!
--
View this message in context:
http://drools.46999.n3.nabble.com/ClassLoader-parameter-and-Init-function...
Sent from the Drools: User forum mailing list archive at Nabble.com.
1:44 a.m.
*push*
--
View this message in context:
http://drools.46999.n3.nabble.com/ClassLoader-parameter-and-Init-function...
Sent from the Drools: User forum mailing list archive at Nabble.com.
3:21 a.m.
No such method errors and the like when playing around with classloaders normally means
that somewhere you have the same jar in the classpath with different versions, you may
well then be loading the classes from different jars depending on which classloader you
are using. Make sure that you definitely don't have any of the old 5.1 jars anywhere
that could be being loaded by mistake.
Thomas
-----Original Message-----
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-
bounces(a)lists.jboss.org] On Behalf Of ssprick
Sent: 11 November 2011 07:45
To: rules-users(a)lists.jboss.org
Subject: Re: [rules-users] ClassLoader parameter and Init function of
RuleBaseConfiguration
*push*
--
View this message in context:
http://drools.46999.n3.nabble.com/ClassLoader-parameter-and-Init-
function-of-RuleBaseConfiguration-tp3489741p3499019.html
Sent from the Drools: User forum mailing list archive at Nabble.com.
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
**************************************************************************************
This message is confidential and intended only for the addressee. If you have received
this message in error, please immediately notify the postmaster(a)nds.com and delete it from
your system as well as any copies. The content of e-mails as well as traffic data may be
monitored by NDS for employment and security purposes. To protect the environment please
do not print this e-mail unless necessary.
NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United
Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. GB 603
8808 40-00
**************************************************************************************
7:04 a.m.
Thank you so much Thomas! There indeed was an old 5.1 jar in another
subproject left on the classpath.
--
View this message in context:
http://drools.46999.n3.nabble.com/ClassLoader-parameter-and-Init-function...
Sent from the Drools: User forum mailing list archive at Nabble.com.
4793
days inactive
4796
days old
3 comments
2 participants
participants (2)
-
ssprick -
Swindells, Thomas