@Geoffrey: did you see the java.lang.ArrayIndexOutOfBoundsException? Doesn't look like a null pointer causing an exception. The upstairs exception might add the basic exceptions's message to its message.
@Soumya: Which Drools version are you using? Basically, this situation is handled correctly by 5.4 and 5.5. -W On 27/05/2014, Geoffrey De Smet <ge0ffrey.s...@gmail.com> wrote: > Check if the logger isn't null (by adding a System.out in the then part > of the rule). > > If that's the case, then that error message is pretty poor (or even > incorrect): > java.lang.RuntimeException: cannot invoke method: info > It should clearly talk about a NullPointer instead. > So, if that's the case, create a jira issue. > https://issues.jboss.org/browse/DROOLS > > > On 27-05-14 07:09, Soumya.plavaga wrote: >> I am using global slf4j log4j logger as a global variable within our drl >> and >> inserting that global logger value at runtime into kiesession. While we >> are >> trying to do logger.info with multiple arguments then it's giving the >> following exception stack trace - >> >> Exception executing consequence for rule "Test Logger 2" in >> test.rules.system: java.lang.RuntimeException: cannot invoke method: info >> at >> org.drools.core.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39) >> at >> org.drools.core.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1027) >> at org.drools.core.phreak.RuleExecutor.fire(RuleExecutor.java:129) >> at >> org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:71) >> at >> org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:935) >> at >> org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1200) >> at >> org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:952) >> at >> org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:926) >> at >> org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:232) >> at >> test.platform.rules.executor.service.impl.RuleExecutorServiceImplTest.testExecuteRule(RuleExecutorServiceImplTest.java:230) >> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) >> at >> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) >> at >> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) >> at java.lang.reflect.Method.invoke(Method.java:606) >> at >> org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) >> at >> org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) >> at >> org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) >> at >> org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) >> at >> org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74) >> at >> org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83) >> at >> org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72) >> at >> org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:232) >> at >> org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89) >> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) >> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) >> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) >> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) >> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) >> at >> org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) >> at >> org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71) >> at org.junit.runners.ParentRunner.run(ParentRunner.java:309) >> at >> org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:175) >> at >> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) >> at >> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) >> at >> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) >> at >> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) >> at >> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) >> at >> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) >> Caused by: java.lang.RuntimeException: cannot invoke method: info >> at >> org.mvel2.optimizers.impl.refl.nodes.MethodAccessor.getValue(MethodAccessor.java:63) >> at >> org.mvel2.optimizers.impl.refl.nodes.VariableAccessor.getValue(VariableAccessor.java:37) >> at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:108) >> at org.mvel2.MVELRuntime.execute(MVELRuntime.java:86) >> at >> org.mvel2.compiler.CompiledExpression.getDirectValue(CompiledExpression.java:123) >> at >> org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:119) >> at org.mvel2.MVEL.executeExpression(MVEL.java:930) >> at >> org.drools.core.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:107) >> at >> org.drools.core.common.DefaultAgenda.fireActivation(DefaultAgenda.java:1016) >> ... 36 more >> Caused by: java.lang.ArrayIndexOutOfBoundsException: 1 >> at >> org.mvel2.optimizers.impl.refl.nodes.MethodAccessor.executeAll(MethodAccessor.java:140) >> at >> org.mvel2.optimizers.impl.refl.nodes.MethodAccessor.getValue(MethodAccessor.java:48) >> ... 44 more >> >> >> Example: My drl file looks like this - >> >> package test.system.rule; >> >> import test.platform.model.*; >> import org.slf4j.Logger; >> >> global Logger logger; >> >> rule "Test Logger 1" >> >> when >> >> then >> >> logger.info("within test logger 1"); >> >> end >> >> rule "Test Logger 2" >> >> when >> >> then >> >> logger.info("within test logger 2. Rule fired {}", >> drools.getRule().getName()); >> >> end >> >> >> While rules are firing then the first logger is getting printed into >> console >> but second one is not getting printed and giving the above exception to >> me. >> >> >> >> -- >> View this message in context: >> http://drools.46999.n3.nabble.com/Slf4j-Log4j-logger-not-working-with-Drools-drl-while-using-as-a-global-variable-tp4029707.html >> Sent from the Drools: User forum 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 > _______________________________________________ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
