NPE when loading saved kie-session ---------------------------------- Key: DROOLS-5713 URL: https://issues.redhat.com/browse/DROOLS-5713 Project: Drools Issue Type: Bug Affects Versions: 7.43.1.Final Reporter: Drobyshev Maksim Assignee: Mario Fusco Priority: Major Facts examples: Value holder: {code:java} public class LongFact implements Serializable { private long value; public LongFact(long value) { this.value = value; } public long getValue() { return value; } public void setValue(long value) { this.value = value; } } {code} List holder: {code:java} public class LongFacts implements Serializable { private List<LongFact> facts; public LongFacts() { this.facts = new ArrayList<>(); } public List<LongFact> getFacts() { return facts; } public void setFacts(List<LongFact> facts) { this.facts = facts; } } {code} And rule example: {code:java} package org.examples.rules; import org.example.facts.data.LongFact import org.example.facts.data.LongFacts query getLongs() val: LongFact() end rule "Extract long facts" when LongFacts($lfs: facts) $lf: LongFact() from $lfs then insertLogical($lf); end {code} Now, if I create a persisted kie-session and insert info LongFacts object with at least one fact in list: {code:java} String id = UUID.randomUUID().toString(); LongFacts longFacts = new LongFacts(); longFacts.getFacts().add(new LongFact(123456)); // Further in the transaction KieSession kieSession = kieStoreServices.newKieSession(kieBase, kieSessionConfiguration, createEnvironment(entityManagerFactory, transactionManager)); kieSession.execute(CommandFactory.newInsert(longFacts)); kieSession.fireAllRules(); // Commit transaction {code} Then, if I try to load this session I will get an exception: {code:java} java.lang.IllegalStateException: java.lang.reflect.InvocationTargetException at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommandService(KnowledgeStoreServiceImpl.java:137) at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.loadKieSession(KnowledgeStoreServiceImpl.java:104) at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.loadKieSession(KnowledgeStoreServiceImpl.java:36) at org.example.drools_persistance_spring.service.DroolsService.loadSession(DroolsService.java:210) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:741) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673) at org.example.drools_persistance_spring.service.DroolsService$$EnhancerBySpringCGLIB$$1d26e7ef.loadSession(<generated>) at org.example.drools_persistance_spring.service.DroolsService.getOrCreate(DroolsService.java:141) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:741) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673) at org.example.drools_persistance_spring.service.DroolsService$$EnhancerBySpringCGLIB$$1d26e7ef.getOrCreate(<generated>) at org.example.drools_persistance_spring.service.DroolsService.sessionDump(DroolsService.java:216) at org.example.drools_persistance_spring.service.DroolsService$$FastClassBySpringCGLIB$$73fd435e.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:669) at org.example.drools_persistance_spring.service.DroolsService$$EnhancerBySpringCGLIB$$1d26e7ef.sessionDump(<generated>) at org.example.drools_persistance_spring.service.DroolsServiceTest.singleSessionWriteTest_withCacheDrop(DroolsServiceTest.java:190) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75) at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86) at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69) at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220) at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53) Caused by: java.lang.reflect.InvocationTargetException at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:423) at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommandService(KnowledgeStoreServiceImpl.java:122) ... 58 more Caused by: java.lang.RuntimeException: Unable to load session snapshot at org.drools.persistence.api.SessionMarshallingHelper.loadSnapshot(SessionMarshallingHelper.java:104) at org.drools.persistence.PersistableRunner.initExistingKnowledgeSession(PersistableRunner.java:254) at org.drools.persistence.PersistableRunner.<init>(PersistableRunner.java:192) ... 63 more Caused by: java.lang.NullPointerException at org.drools.core.marshalling.impl.ProtobufInputMarshaller.readBeliefSet(ProtobufInputMarshaller.java:625) at org.drools.core.marshalling.impl.ProtobufInputMarshaller.readTruthMaintenanceSystem(ProtobufInputMarshaller.java:598) at org.drools.core.marshalling.impl.ProtobufInputMarshaller.readSession(ProtobufInputMarshaller.java:253) at org.drools.core.marshalling.impl.ProtobufInputMarshaller.readSession(ProtobufInputMarshaller.java:166) at org.drools.core.marshalling.impl.ProtobufMarshaller.unmarshallWithMessage(ProtobufMarshaller.java:141) at org.drools.core.marshalling.impl.ProtobufMarshaller.unmarshall(ProtobufMarshaller.java:92) at org.drools.core.marshalling.impl.ProtobufMarshaller.unmarshall(ProtobufMarshaller.java:50) at org.drools.persistence.api.SessionMarshallingHelper.loadSnapshot(SessionMarshallingHelper.java:99) ... 65 more {code} If I change *insertLogical* on just *insert* kie session will be loaded correctly. But I need to use *insertLogical*.