In 5.5.0 the unmarshalling of a stateful sessions causes the following NPE trace when KnowledgeSessionConfiguration.setOption(TimerJobFactoryOption.get("trackable")); is set! This worked fine under 5.4.0 where the options was still set with ((SessionConfiguration) this.conf).setTimerJobFactoryManager(new TrackableTimeJobFactoryManager());

The error only occurs with the option set, no w/o it and iff temporal operators are present. In my cases I simply used a over window:time operator.

Steps to reproduce:

1. Create two rules one w/ time window (1) and one w/o time window (2)
2. Do not active rule (2)
3. Send an event that would potentially activate (2)
4. Unmarshall Session (i.e., simulate the recovery from a system failure)
5. Activate (2)
6. Exception

java.lang.NullPointerException
at org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteExpireAction.serialize(ReteooWorkingMemory.java:495)
at org.drools.marshalling.impl.ProtobufOutputMarshaller.writeActionQueue(ProtobufOutputMarshaller.java:454)
at org.drools.marshalling.impl.ProtobufOutputMarshaller.serializeSession(ProtobufOutputMarshaller.java:145)
at org.drools.marshalling.impl.ProtobufOutputMarshaller.writeSession(ProtobufOutputMarshaller.java:100)
at org.drools.marshalling.impl.ProtobufMarshaller.marshall(ProtobufMarshaller.java:169)
at org.drools.marshalling.impl.ProtobufMarshaller.marshall(ProtobufMarshaller.java:151)
at com.sap.gamification.ruleengine.RuleEngine.getSnapshot(RuleEngine.java:603)
at com.sap.gamification.ruleengine.RuleEngine.storeSession(RuleEngine.java:567)
at com.sap.gamification.ruleengine.TrackingAgendaEventListener.activationCreated(TrackingAgendaEventListener.java:45)
at org.drools.impl.StatefulKnowledgeSessionImpl$AgendaEventListenerWrapper.activationCreated(StatefulKnowledgeSessionImpl.java:643)
at org.drools.event.AgendaEventSupport.fireActivationCreated(AgendaEventSupport.java:41)
at org.drools.common.DefaultAgenda.createActivation(DefaultAgenda.java:602)
at org.drools.reteoo.RuleTerminalNode.assertLeftTuple(RuleTerminalNode.java:253)
at org.drools.reteoo.JoinNode.updateSink(JoinNode.java:411)
at org.drools.reteoo.RuleTerminalNode.attach(RuleTerminalNode.java:346)
at org.drools.reteoo.builder.ReteooRuleBuilder.addSubRule(ReteooRuleBuilder.java:174)
at org.drools.reteoo.builder.ReteooRuleBuilder.addRule(ReteooRuleBuilder.java:134)
at org.drools.reteoo.ReteooBuilder.addRule(ReteooBuilder.java:113)
at org.drools.reteoo.ReteooRuleBase.addRule(ReteooRuleBase.java:445)
at org.drools.common.AbstractRuleBase.addRule(AbstractRuleBase.java:952)
at org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:629)
at org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:472)
at org.drools.impl.KnowledgeBaseImpl.addKnowledgePackages(KnowledgeBaseImpl.java:149)
at com.sap.gamification.ruleengine.RuleEngine.addKnowledgeToBase(RuleEngine.java:477)
at com.sap.gamification.ruleengine.RuleEngine.loadRule(RuleEngine.java:428)
at com.sap.gamification.ruleengine.RuleEngine.addRuleToEngine(RuleEngine.java:435)
at com.sap.gamification.ruleengine.RuleService.deployRule(RuleService.java:144)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sap.gamification.receive.GenericJsonMarshalling.invokeMethod(GenericJsonMarshalling.java:190)
at com.sap.gamification.receive.JsonRPC.executeRequest(JsonRPC.java:108)
at com.sap.gamification.ruleengine.web.RuleServiceServlet.doPost(RuleServiceServlet.java:54)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:755)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at com.sap.gamification.security.LocalHostFilter.doFilter(LocalHostFilter.java:46)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at com.sap.security.auth.service.webcontainer.internal.Authenticator.invoke(Authenticator.java:147)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at com.sap.core.tenant.valve.TenantValidationValve.invokeNextValve(TenantValidationValve.java:169)
at com.sap.core.tenant.valve.TenantValidationValve.invoke(TenantValidationValve.java:85)
at com.sap.core.js.monitoring.tomcat.valve.RequestTracingValve.invoke(RequestTracingValve.java:27)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Unexpected exception executing action org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteExpireAction@5e2a4a68
org.drools.RuntimeDroolsException: Unexpected exception executing action org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteExpireAction@5e2a4a68
at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:995)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:707)
at org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:674)
at org.drools.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:230)
at com.sap.gamification.ruleengine.RuleEngine.fireRules(RuleEngine.java:539)
at com.sap.gamification.ruleengine.RuleEngine.addRuleToEngine(RuleEngine.java:437)
at com.sap.gamification.ruleengine.RuleService.deployRule(RuleService.java:144)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sap.gamification.receive.GenericJsonMarshalling.invokeMethod(GenericJsonMarshalling.java:190)
at com.sap.gamification.receive.JsonRPC.executeRequest(JsonRPC.java:108)
at com.sap.gamification.ruleengine.web.RuleServiceServlet.doPost(RuleServiceServlet.java:54)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:755)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at com.sap.gamification.security.LocalHostFilter.doFilter(LocalHostFilter.java:46)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at com.sap.security.auth.service.webcontainer.internal.Authenticator.invoke(Authenticator.java:147)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at com.sap.core.tenant.valve.TenantValidationValve.invokeNextValve(TenantValidationValve.java:169)
at com.sap.core.tenant.valve.TenantValidationValve.invoke(TenantValidationValve.java:85)
at com.sap.core.js.monitoring.tomcat.valve.RequestTracingValve.invoke(RequestTracingValve.java:27)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
at org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteExpireAction.execute(ReteooWorkingMemory.java:505)
at org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:993)
... 37 more