[rules-users] Eval0Invoker : java.lang.NullPointerException

Michael Anstis michael.anstis at gmail.com
Thu Dec 15 10:46:37 EST 2011 

Without seeing your full code I suspect you have more than one Customer in
Working Memory.

>From what you have provided message "Electric Service Interfaces are
required" can only be thrown by one rule, that has only one condition -
checking a Customer object. Also message "PAN Device list cannot be null or
empty" is thrown from a rule that also checks Customer (however the
additional constraints may lead to only two messages being reported). I
also assume you don't do anything extra in your error handler (such as
updating facts).

On 15 December 2011 15:33, Venkat <ven12344 at yahoo.com> wrote:

> Hi Manstis, I have tried what you said and found that, in the drools rule
> file the fields and objects were not able to get by its direct name, so I
> called those by calling from get methods and I am able to run the rules but
> it is behaving odd now.
>
> I mean it is giving me the same error in my "consequence" many times and
> then going to the end rule and giving me the same error twice. So I don't
> know what is happening. Check out the response I get, also check the rule
> file for messages
>
>
>
> Customer and ServiceContext are both required
> Electric Service Interfaces are required
> Electric Service Interfaces are required
> Electric Service Interfaces are required
> Electric Service Interfaces are required
> PAN Device list cannot be null or empty
> PAN Device list cannot be null or empty
> Exception executing predicate
> $panDevice.getSmartDeviceModel().getDeviceClass() == null
>
> com.ge.energy.drms.smartgrid.datamodel.services.enddevicemanagement.pandeviceregistrationservice.PANDeviceRegistrationServiceFault:
> Exception executing predicate
> $panDevice.getSmartDeviceModel().getDeviceClass() == null
>        at
>
> com.ge.energy.drms.external.integration.service.impl.PANDeviceRegistrationServiceImpl.provisionPANDevice(PANDeviceRegistrationServiceImpl.java:100)
>         at
>
> com.ge.energy.drms.external.integration.service.impl.test.ProvisionPanDeviceRequestValidationTest.testMACAdress(ProvisionPanDeviceRequestValidationTest.java:249)
>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>        at
>
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>        at
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>        at java.lang.reflect.Method.invoke(Method.java:597)
>        at junit.framework.TestCase.runTest(TestCase.java:168)
>        at junit.framework.TestCase.runBare(TestCase.java:134)
>        at junit.framework.TestResult$1.protect(TestResult.java:110)
>        at junit.framework.TestResult.runProtected(TestResult.java:128)
>        at junit.framework.TestResult.run(TestResult.java:113)
>        at junit.framework.TestCase.run(TestCase.java:124)
>        at junit.framework.TestSuite.runTest(TestSuite.java:232)
>        at junit.framework.TestSuite.run(TestSuite.java:227)
>        at
>
> org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
>        at
>
> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
>        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)
>
> com.ge.energy.drms.smartgrid.datamodel.services.enddevicemanagement.pandeviceregistrationservice.PANDeviceRegistrationServiceFault:
> Exception executing predicate
> $panDevice.getSmartDeviceModel().getDeviceClass() == null
>        at
>
> com.ge.energy.drms.external.integration.service.impl.PANDeviceRegistrationServiceImpl.provisionPANDevice(PANDeviceRegistrationServiceImpl.java:100)
>        at
>
> com.ge.energy.drms.external.integration.service.impl.test.ProvisionPanDeviceRequestValidationTest.testInstallCode(ProvisionPanDeviceRequestValidationTest.java:285)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>        at
>
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>        at
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>        at java.lang.reflect.Method.invoke(Method.java:597)
>        at junit.framework.TestCase.runTest(TestCase.java:168)
>        at junit.framework.TestCase.runBare(TestCase.java:134)
>        at junit.framework.TestResult$1.protect(TestResult.java:110)
>        at junit.framework.TestResult.runProtected(TestResult.java:128)
>        at junit.framework.TestResult.run(TestResult.java:113)
>        at junit.framework.TestCase.run(TestCase.java:124)
>        at junit.framework.TestSuite.runTest(TestSuite.java:232)
>        at junit.framework.TestSuite.run(TestSuite.java:227)
>        at
>
> org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
>        at
>
> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
>        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)
>
> com.ge.energy.drms.smartgrid.datamodel.services.enddevicemanagement.pandeviceregistrationservice.PANDeviceRegistrationServiceFault:
> Exception executing predicate
> $panDevice.getSmartDeviceModel().getDeviceClass() == null
>        at
>
> com.ge.energy.drms.external.integration.service.impl.PANDeviceRegistrationServiceImpl.provisionPANDevice(PANDeviceRegistrationServiceImpl.java:100)
>        at
>
> com.ge.energy.drms.external.integration.service.impl.test.ProvisionPanDeviceRequestValidationTest.testSmartDeviceModel(ProvisionPanDeviceRequestValidationTest.java:321)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>        at
>
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>        at
>
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>        at java.lang.reflect.Method.invoke(Method.java:597)
>        at junit.framework.TestCase.runTest(TestCase.java:168)
>        at junit.framework.TestCase.runBare(TestCase.java:134)
>        at junit.framework.TestResult$1.protect(TestResult.java:110)
>        at junit.framework.TestResult.runProtected(TestResult.java:128)
>        at junit.framework.TestResult.run(TestResult.java:113)
>        at junit.framework.TestCase.run(TestCase.java:124)
>        at junit.framework.TestSuite.runTest(TestSuite.java:232)
>        at junit.framework.TestSuite.run(TestSuite.java:227)
>        at
>
> org.junit.internal.runners.JUnit38ClassRunner.run(JUnit38ClassRunner.java:83)
>        at
>
> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
>        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)
> Exception executing predicate
> $panDevice.getSmartDeviceModel().getDeviceClass() == null
> Device Type cannot be null
> Device Type cannot be null
>
>
>
>
> Thanks
> Venkat.
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/Eval0Invoker-java-lang-NullPointerException-tp3586222p3588957.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
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>
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