[jboss-user] [jBPM] - NullPointerException when try to getProcessInstance

liliana.iovanovici [https://community.jboss.org/people/liliana.iovanovici] created the discussion "NullPointerException when try to getProcessInstance" To view the discussion, visit: https://community.jboss.org/message/735403#735403 -------------------------------------------------------------- Hello, I am trying to start a process and after a while to send a signal to process. I got the an exception: java.lang.NullPointerException     at java.io.ByteArrayInputStream.<init>(ByteArrayInputStream.java:89)     at org.jbpm.persistence.processinstance.ProcessInstanceInfo.getProcessInstance(ProcessInstanceInfo.java:128)     at org.jbpm.persistence.processinstance.JPAProcessInstanceManager.getProcessInstance(JPAProcessInstanceManager.java:82)     at org.jbpm.process.instance.ProcessRuntimeImpl.getProcessInstance(ProcessRuntimeImpl.java:204)     at org.drools.common.AbstractWorkingMemory.getProcessInstance(AbstractWorkingMemory.java:1097)     at org.drools.impl.StatefulKnowledgeSessionImpl.getProcessInstance(StatefulKnowledgeSessionImpl.java:283)     at org.drools.command.runtime.process.SignalEventCommand.execute(SignalEventCommand.java:93)     at org.drools.command.impl.DefaultCommandService.execute(DefaultCommandService.java:36)     at org.drools.persistence.SingleSessionCommandService.execute(SingleSessionCommandService.java:345)     at org.drools.command.impl.CommandBasedStatefulKnowledgeSession.signalEvent(CommandBasedStatefulKnowledgeSession.java:210)     at com.aciworldwide.aps.adf.core.adapter.orchestration.jbpm5.JbpmApiHelperLocalImpl.signalProcess(JbpmApiHelperLocalImpl.java:86)     at com.aciworldwide.aps.adf.core.adapter.orchestration.jbpm5.OrchestrationAdapterJbpmImpl.completeTask(OrchestrationAdapterJbpmImpl.java:203)     at com.aciworldwide.aps.adf.core.service.orchestration.HumanTaskServiceImpl.completeTask(HumanTaskServiceImpl.java:103)     at com.aciworldwide.aps.adf.core.service.orchestration.OrchestrationServiceImpl.completeTask(OrchestrationServiceImpl.java:170)     at com.dev.test.biz.payment.PaymentServiceImpl.completeSubmitPaymentTask(PaymentServiceImpl.java:259)     at com.dev.test.biz.payment.PaymentServiceImpl.submitPaymentTask(PaymentServiceImpl.java:232)     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 org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309)     at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)     at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)     at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)     at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)     at $Proxy41.submitPaymentTask(Unknown Source)     at com.dev.test.web.impl.delegate.payment.PaymentServiceDelegateImpl.submitPayment(PaymentServiceDelegateImpl.java:215)     at com.dev.test.web.impl.controller.payment.PaymentActionControllerImpl.handleSubmitPayment(PaymentActionControllerImpl.java:89)     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 org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)     at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:426)     at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:414)     at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:790)     at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:719)     at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:644)     at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:560)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) I saw that when try to get process instances in ProcessInstanceInfo class, processInstanceByteArray is null. This is happening only when I send the signal after a while, not immediatly. Note: I am using openjpa for persistence. Thanks for help, Liliana -------------------------------------------------------------- Reply to this message by going to Community [https://community.jboss.org/message/735403#735403] Start a new discussion in jBPM at Community [https://community.jboss.org/choose-container!input.jspa?contentType=1&...]