为什么在KieSession重新加载时出现异常？

Question

I'm running a simple test where the KieSession is operating in STREAM mode. I define "MyEvent" as an event and specify that it should expire in 3s. After inserting the event, I dispose of the KieSession, sleep for 5s (to allow the timer to expire), and then attempt to reload the session. However, when I attempt the session reload, I get Exceptions similar to those shown below.

Thanks in advance for any insights.

kmodule.xml:

 <?xml version="1.0" encoding="UTF-8"?> <kmodule xmlns="http://jboss.org/kie/6.0.0/kmodule"> <kbase name="rules" eventProcessingMode="stream" packages="rules"> <ksession name="ksession-rules"/> </kbase> </kmodule> 

MyEvent.drl :

package com.mytest.stream;

import java.util.Date;

declare MyEvent
    @role( event )
    @expires( 3s ) 
end

rule 'MyEvent'
when
    $m: MyEvent()
then
    System.out.println(new Date() + " demoReload: Got MyEvent, id=" + $m.getId());
end

MyEvent.java :

package com.mytest.stream;
import java.io.Serializable;
public class MyEvent implements Serializable {
    private static final long serialVersionUID = 1L;
    private String id;
    public MyEvent(String id) {
        this.id = id;
    }
    public static long getSerialversionuid() {
        return serialVersionUID;
    }
    public String getId() {
        return id;
    }
}

persistence.xml :

 <?xml version="1.0" encoding="UTF-8" ?> <persistence version="2.1" xmlns="http://xmlns.jcp.org/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd"> <persistence-unit name="myPU" transaction-type="JTA"> <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> <jta-data-source>jdbc/BitronixJTADataSource</jta-data-source> <class>org.drools.persistence.info.SessionInfo</class> <class>org.drools.persistence.info.WorkItemInfo</class> <properties> <property name="hibernate.dialect" value="org.hibernate.dialect.H2Dialect" /> <property name="hibernate.max_fetch_depth" value="3" /> <property name="hibernate.hbm2ddl.auto" value="update" /> <property name="hibernate.show_sql" value="true" /> <property name="hibernate.transaction.manager_lookup_class" value="org.hibernate.transaction.BTMTransactionManagerLookup" /> </properties> </persistence-unit> </persistence> 

DroolsTest.java :

package com.mytest.stream;

import javax.persistence.Persistence;

import org.junit.Test;
import org.kie.api.KieBase;
import org.kie.api.KieServices;
import org.kie.api.runtime.Environment;
import org.kie.api.runtime.EnvironmentName;
import org.kie.api.runtime.KieContainer;
import org.kie.api.runtime.KieSession;

import bitronix.tm.TransactionManagerServices;
import bitronix.tm.resource.jdbc.PoolingDataSource;

import com.mytest.stream.MyEvent;

import java.util.Date;
public class DroolsTest {

    @Test
    public void demoReloadFailure() throws Throwable {    
        System.getProperties().put("java.naming.factory.initial","bitronix.tm.jndi.BitronixInitialContextFactory");
        PoolingDataSource ds = new PoolingDataSource();
        ds.setUniqueName("jdbc/BitronixJTADataSource");
        ds.setClassName("org.h2.jdbcx.JdbcDataSource");
        ds.setMaxPoolSize( 3 );
        ds.setAllowLocalTransactions( true );
        ds.getDriverProperties().put( "user", "sa" );
        ds.getDriverProperties().put( "password", "" );
        ds.getDriverProperties().put( "URL", "jdbc:h2:file:./sql/mytest");
        ds.init();

        try {
            KieServices ks = KieServices.Factory.get();
            Environment env = ks.newEnvironment();
            env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, Persistence.createEntityManagerFactory( "myPU" ) );
            env.set( EnvironmentName.TRANSACTION_MANAGER,TransactionManagerServices.getTransactionManager() );
            KieContainer kieContainer = ks.getKieClasspathContainer();
            KieBase kieBase = kieContainer.getKieBase("rules");
            KieSession kieSession = ks.getStoreServices().newKieSession(kieBase, null, env);   
            long kieSessionId = kieSession.getIdentifier();
            kieSession.insert(new MyEvent("EVENT1"));
            kieSession.fireAllRules();
            kieSession.dispose(); 

            // Timer in MyEvent.drl set for 3 second expiration, so it will already have expired
            // when session reload is attempted.
            //
            Thread.sleep(5000);

            kieSession = ks.getStoreServices().loadKieSession( kieSessionId, kieBase, null, env );
            kieSession.fireAllRules();
            kieSession.dispose();

        } catch (Exception e) {
            System.out.println(new Date() + " demoReloadFailure: Caught Exception, message=" + e.getMessage());
        }
    } 
}

pom.xml :

 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.mytest.stream</groupId> <artifactId>drools-stream</artifactId> <version>1.0</version> <properties> <drools.version>6.3.0.Final</drools.version> </properties> <!-- JBOSS repository --> <repositories> <repository> <id>jboss-public-repository-group</id> <name>JBoss Public Repository Group</name> <url>http://repository.jboss.org/nexus/content/groups/public/</url> <layout>default</layout> <releases> <enabled>true</enabled> <updatePolicy>never</updatePolicy> </releases> </repository> </repositories> <dependencies> <dependency> <groupId>org.drools</groupId> <artifactId>drools-core</artifactId> <version>${drools.version}</version> </dependency> <dependency> <groupId>org.drools</groupId> <artifactId>drools-compiler</artifactId> <version>${drools.version}</version> </dependency> <dependency> <groupId>org.drools</groupId> <artifactId>drools-persistence-jpa</artifactId> <version>${drools.version}</version> <exclusions> <exclusion> <artifactId>hibernate-jpa-2.0-api</artifactId> <groupId>org.hibernate.javax.persistence</groupId> </exclusion> </exclusions> </dependency> <!-- Testing --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <!-- Logging --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.6.4</version> <scope>provided</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.6.4</version> <scope>provided</scope> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.14</version> <scope>provided</scope> </dependency> <dependency> <groupId>com.h2database</groupId> <artifactId>h2</artifactId> <version>[1.4.186,)</version> </dependency> <dependency> <groupId>javax.transaction</groupId> <artifactId>jta</artifactId> <version>1.1</version> </dependency> <dependency> <groupId>org.codehaus.btm</groupId> <artifactId>btm</artifactId> <version>2.1.4</version> </dependency> <!-- Persistence using hibernate --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>5.0.7.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>5.0.7.Final</version> </dependency> </dependencies> </project> 

Log (including NullPointerException; some lines omitted to conform to stackoverflow character limit) :

[main] DEBUG bitronix.tm.resource.jdbc.PoolingDataSource  - building XA pool for jdbc/BitronixJTADataSource with 0 connection(s)
20   [main] DEBUG bitronix.tm.resource.common.XAPool  - setting vendor property 'URL' to 'jdbc:h2:file:./sql/mytest'
23   [main] DEBUG bitronix.tm.resource.common.XAPool  - setting vendor property 'user' to 'sa'
23   [main] DEBUG bitronix.tm.resource.common.XAPool  - setting vendor property 'password' to ''
35   [main] DEBUG bitronix.tm.timer.TaskScheduler  - task scheduler backed by ConcurrentSkipListSet
50   [main] DEBUG bitronix.tm.timer.TaskScheduler  - scheduling pool shrinking task on an XAPool of resource jdbc/BitronixJTADataSource with 0 connection(s) (0 still available) for Tue Jan 06 21:47:35 EST 1970
50   [main] DEBUG bitronix.tm.timer.TaskScheduler  - removing task by an XAPool of resource jdbc/BitronixJTADataSource with 0 connection(s) (0 still available)
51   [main] DEBUG bitronix.tm.timer.TaskScheduler  - scheduled a PoolShrinkingTask scheduled for Tue Jan 06 21:47:35 EST 1970 on an XAPool of resource jdbc/BitronixJTADataSource with 0 connection(s) (0 still available), total task(s) queued: 1
53   [main] DEBUG bitronix.tm.Configuration  - loading default configuration
53   [main] DEBUG bitronix.tm.Configuration  - no configuration file found, using default settings
129  [main] DEBUG org.jboss.logging  - Logging Provider: org.jboss.logging.Log4jLoggerProvider
229  [main] DEBUG org.hibernate.jpa.boot.spi.ProviderChecker  - Persistence-unit [myPU] requested PersistenceProvider [org.hibernate.jpa.HibernatePersistenceProvider]
235  [main] DEBUG org.hibernate.jpa.internal.util.LogHelper  - PersistenceUnitInfo [
    name: myPU
    persistence provider classname: org.hibernate.jpa.HibernatePersistenceProvider
    classloader: null
    excludeUnlistedClasses: false
    JTA datasource: jdbc/BitronixJTADataSource
    Non JTA datasource: null
    Transaction type: JTA
    PU root URL: file:/C:/Users/ks922p/workspace_luna/drools-stream-a/target/classes/
    Shared Cache Mode: null
    Validation Mode: null
    Jar files URLs []
    Managed classes names [
        org.drools.persistence.info.SessionInfo
        org.drools.persistence.info.WorkItemInfo]
    Mapping files names []
    Properties [
        hibernate.max_fetch_depth: 3
        hibernate.transaction.manager_lookup_class: org.hibernate.transaction.BTMTransactionManagerLookup
        hibernate.dialect: org.hibernate.dialect.H2Dialect
        hibernate.show_sql: true
        hibernate.hbm2ddl.auto: update]
245  [main] DEBUG org.hibernate.integrator.internal.IntegratorServiceImpl  - Adding Integrator [org.hibernate.cfg.beanvalidation.BeanValidationIntegrator].
246  [main] DEBUG org.hibernate.integrator.internal.IntegratorServiceImpl  - Adding Integrator [org.hibernate.secure.spi.JaccIntegrator].
248  [main] DEBUG org.hibernate.integrator.internal.IntegratorServiceImpl  - Adding Integrator [org.hibernate.cache.internal.CollectionCacheInvalidator].
248  [main] DEBUG org.hibernate.integrator.internal.IntegratorServiceImpl  - Adding Integrator [org.hibernate.jpa.event.spi.JpaIntegrator].
8266 [main] DEBUG bitronix.tm.BitronixTransaction  - executing synchronization a DeferredReleaseSynchronization of a JdbcPooledConnection from datasource jdbc/BitronixJTADataSource in state NOT_ACCESSIBLE with usage count 0 wrapping xads1: conn2: url=jdbc:h2:file:./sql/mytest user=SA with status=ROLLEDBACK
8266 [main] DEBUG bitronix.tm.resource.common.DeferredReleaseSynchronization  - DeferredReleaseSynchronization requeuing a JdbcPooledConnection from datasource jdbc/BitronixJTADataSource in state NOT_ACCESSIBLE with usage count 0 wrapping xads1: conn2: url=jdbc:h2:file:./sql/mytest user=SA
8266 [main] DEBUG bitronix.tm.resource.common.AbstractXAStatefulHolder  - notifying 2 stateChangeEventListener(s) about state changing from NOT_ACCESSIBLE to IN_POOL in a JdbcPooledConnection from datasource jdbc/BitronixJTADataSource in state NOT_ACCESSIBLE with usage count 0 wrapping xads1: conn2: url=jdbc:h2:file:./sql/mytest user=SA
8266 [main] DEBUG bitronix.tm.resource.jdbc.JdbcPooledConnection  - closing 0 dangling uncached statement(s)
8266 [main] DEBUG bitronix.tm.resource.jdbc.JdbcPooledConnection  - clearing warnings of conn3: url=jdbc:h2:file:./sql/mytest user=SA
8266 [main] DEBUG bitronix.tm.resource.common.AbstractXAStatefulHolder  - state changing from NOT_ACCESSIBLE to IN_POOL in a JdbcPooledConnection from datasource jdbc/BitronixJTADataSource in state NOT_ACCESSIBLE with usage count 0 wrapping xads1: conn2: url=jdbc:h2:file:./sql/mytest user=SA
8266 [main] DEBUG bitronix.tm.resource.common.AbstractXAStatefulHolder  - notifying 2 stateChangeEventListener(s) about state changed from NOT_ACCESSIBLE to IN_POOL in a JdbcPooledConnection from datasource jdbc/BitronixJTADataSource in state IN_POOL with usage count 0 wrapping xads1: conn2: url=jdbc:h2:file:./sql/mytest user=SA
8266 [main] DEBUG bitronix.tm.resource.jdbc.JdbcPooledConnection  - requeued JDBC connection of a PoolingDataSource containing an XAPool of resource jdbc/BitronixJTADataSource with 2 connection(s) (1 still available)
8266 [main] DEBUG bitronix.tm.resource.common.XAPool  - a connection's state changed to IN_POOL, notifying a thread eventually waiting for a connection
8266 [main] DEBUG bitronix.tm.resource.common.DeferredReleaseSynchronization  - DeferredReleaseSynchronization requeued a JdbcPooledConnection from datasource jdbc/BitronixJTADataSource in state IN_POOL with usage count 0 wrapping xads1: conn2: url=jdbc:h2:file:./sql/mytest user=SA
8267 [main] WARN  org.drools.persistence.jta.JtaTransactionManager  - Unable to commit transaction
bitronix.tm.internal.BitronixRollbackException: RuntimeException thrown during beforeCompletion cycle caused transaction rollback
    at bitronix.tm.BitronixTransaction.commit(BitronixTransaction.java:241)
    at bitronix.tm.BitronixTransactionManager.commit(BitronixTransactionManager.java:143)
    at org.drools.persistence.jta.JtaTransactionManager.commit(JtaTransactionManager.java:236)
    at org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:185)
    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:422)
    at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommandService(KnowledgeStoreServiceImpl.java:143)
    at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.loadKieSession(KnowledgeStoreServiceImpl.java:111)
    at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.loadKieSession(KnowledgeStoreServiceImpl.java:39)
    at com.mytest.stream.DroolsTest.demoReloadFailure(DroolsTest.java:52)
    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:497)
    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.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    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$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: java.lang.NullPointerException
    at org.drools.core.reteoo.ObjectTypeNode$ExpireJobContextTimerOutputMarshaller.serialize(ObjectTypeNode.java:618)
    at org.drools.core.marshalling.impl.ProtobufOutputMarshaller.writeTimers(ProtobufOutputMarshaller.java:882)
    at org.drools.core.marshalling.impl.ProtobufOutputMarshaller.serializeSession(ProtobufOutputMarshaller.java:214)
    at org.drools.core.marshalling.impl.ProtobufOutputMarshaller.writeSession(ProtobufOutputMarshaller.java:120)
    at org.drools.core.marshalling.impl.ProtobufMarshaller.marshall(ProtobufMarshaller.java:154)
    at org.drools.core.marshalling.impl.ProtobufMarshaller.marshall(ProtobufMarshaller.java:138)
    at org.drools.persistence.SessionMarshallingHelper.getSnapshot(SessionMarshallingHelper.java:79)
    at org.drools.persistence.info.SessionInfo.transform(SessionInfo.java:96)
    at org.drools.persistence.TriggerUpdateTransactionSynchronization.beforeCompletion(TriggerUpdateTransactionSynchronization.java:57)
    at org.drools.persistence.jta.JtaTransactionSynchronizationAdapter.beforeCompletion(JtaTransactionSynchronizationAdapter.java:54)
    at bitronix.tm.BitronixTransaction.fireBeforeCompletionEvent(BitronixTransaction.java:532)
    at bitronix.tm.BitronixTransaction.commit(BitronixTransaction.java:235)
    ... 34 more
8268 [main] WARN  org.drools.persistence.SingleSessionCommandService  - Could not commit session
java.lang.RuntimeException: Unable to commit transaction
    at org.drools.persistence.jta.JtaTransactionManager.commit(JtaTransactionManager.java:239)
    at org.drools.persistence.SingleSessionCommandService.<init>(SingleSessionCommandService.java:185)
    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:422)
    at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.buildCommandService(KnowledgeStoreServiceImpl.java:143)
    at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.loadKieSession(KnowledgeStoreServiceImpl.java:111)
    at org.drools.persistence.jpa.KnowledgeStoreServiceImpl.loadKieSession(KnowledgeStoreServiceImpl.java:39)
    at com.mytest.stream.DroolsTest.demoReloadFailure(DroolsTest.java:52)
    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:497)
    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.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    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$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: bitronix.tm.internal.BitronixRollbackException: RuntimeException thrown during beforeCompletion cycle caused transaction rollback
    at bitronix.tm.BitronixTransaction.commit(BitronixTransaction.java:241)
    at bitronix.tm.BitronixTransactionManager.commit(BitronixTransactionManager.java:143)
    at org.drools.persistence.jta.JtaTransactionManager.commit(JtaTransactionManager.java:236)
    ... 32 more
Caused by: java.lang.NullPointerException
    at org.drools.core.reteoo.ObjectTypeNode$ExpireJobContextTimerOutputMarshaller.serialize(ObjectTypeNode.java:618)
    at org.drools.core.marshalling.impl.ProtobufOutputMarshaller.writeTimers(ProtobufOutputMarshaller.java:882)
    at org.drools.core.marshalling.impl.ProtobufOutputMarshaller.serializeSession(ProtobufOutputMarshaller.java:214)
    at org.drools.core.marshalling.impl.ProtobufOutputMarshaller.writeSession(ProtobufOutputMarshaller.java:120)
    at org.drools.core.marshalling.impl.ProtobufMarshaller.marshall(ProtobufMarshaller.java:154)
    at org.drools.core.marshalling.impl.ProtobufMarshaller.marshall(ProtobufMarshaller.java:138)
    at org.drools.persistence.SessionMarshallingHelper.getSnapshot(SessionMarshallingHelper.java:79)
    at org.drools.persistence.info.SessionInfo.transform(SessionInfo.java:96)
    at org.drools.persistence.TriggerUpdateTransactionSynchronization.beforeCompletion(TriggerUpdateTransactionSynchronization.java:57)
    at org.drools.persistence.jta.JtaTransactionSynchronizationAdapter.beforeCompletion(JtaTransactionSynchronizationAdapter.java:54)
    at bitronix.tm.BitronixTransaction.fireBeforeCompletionEvent(BitronixTransaction.java:532)
    at bitronix.tm.BitronixTransaction.commit(BitronixTransaction.java:235)
    ... 34 more
Wed Apr 20 16:56:06 EDT 2016 demoReloadFailure: Caught Exception, message=java.lang.reflect.InvocationTargetException

Answer 1

We have a session running in STREAM mode that has been disposed (!) and is then pulled out of the hat again. I think that a session that has been disposed is gone, dead and buried: all resources have been relinquished.

Also, I wonder what you intend with triggering an event processing session that runs with a real time clock with fireAllRules which doesn't allow for timeout expiries in the first place. fireUntilHalt is to be used for event processing.

Also, putting pending timeouts "on ice" raises serious doubts regarding the logical consistency of a Drools application. If a timer expires while the session is hibernating, facts should be retracted and/or rules should fire, which should trigger other facts, and so on. Typically, such actions depend on being done "on time" or "in time", not when the ice thaws.