Getting null pointer exception when complete the task

[golla manoj]

Recently we have migrated Jbpm from 6 to 8 and when trying to process the Old started records we are getting below error. but when its started new in the new version of JBPM there is no issue.

2025-02-18 06:07:00,297 WARN  [org.drools.persistence.PersistableRunner] (default task-10) Could not commit session: java.lang.NullPointerException
at java.base/java.io.ByteArrayInputStream.<init>(ByteArrayInputStream.java:108)
at deployment.kie-server.war//org.drools.persistence.info.WorkItemInfo.getWorkItem(WorkItemInfo.java:118)
at deployment.kie-server.war//org.drools.persistence.jpa.processinstance.JPAWorkItemManager.internalGetWorkItem(JPAWorkItemManager.java:235)
at deployment.kie-server.war//org.drools.persistence.jpa.processinstance.JPAWorkItemManager.completeWorkItem(JPAWorkItemManager.java:165)
at deployment.kie-server.war//org.drools.core.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:75)
at deployment.kie-server.war//org.drools.core.command.runtime.process.CompleteWorkItemCommand.execute(CompleteWorkItemCommand.java:35)
at deployment.kie-server.war//org.drools.core.fluent.impl.PseudoClockRunner.executeBatch(PseudoClockRunner.java:102)
at deployment.kie-server.war//org.drools.core.fluent.impl.PseudoClockRunner.executeBatches(PseudoClockRunner.java:69)
at deployment.kie-server.war//org.drools.core.fluent.impl.PseudoClockRunner.execute(PseudoClockRunner.java:61)
at deployment.kie-server.war//org.drools.core.fluent.impl.PseudoClockRunner.execute(PseudoClockRunner.java:39)
at deployment.kie-server.war//org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:39)
at deployment.kie-server.war//org.drools.persistence.PersistableRunner$TransactionInterceptor.execute(PersistableRunner.java:608)
at deployment.kie-server.war//org.drools.persistence.PersistableRunner$TransactionInterceptor.execute(PersistableRunner.java:568)
at deployment.kie-server.war//org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:39)
at deployment.kie-server.war//org.drools.persistence.jpa.OptimisticLockRetryInterceptor.internalExecute(OptimisticLockRetryInterceptor.java:102)
at deployment.kie-server.war//org.drools.persistence.jpa.OptimisticLockRetryInterceptor.execute(OptimisticLockRetryInterceptor.java:83)
at deployment.kie-server.war//org.drools.persistence.jpa.OptimisticLockRetryInterceptor.execute(OptimisticLockRetryInterceptor.java:44)
at deployment.kie-server.war//org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:39)
at deployment.kie-server.war//org.drools.persistence.jta.TransactionLockInterceptor.execute(TransactionLockInterceptor.java:73)
at deployment.kie-server.war//org.drools.persistence.jta.TransactionLockInterceptor.execute(TransactionLockInterceptor.java:45)
at deployment.kie-server.war//org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:39)
at deployment.kie-server.war//org.jbpm.runtime.manager.impl.error.ExecutionErrorHandlerInterceptor.internalExecute(ExecutionErrorHandlerInterceptor.java:66)
at deployment.kie-server.war//org.jbpm.runtime.manager.impl.error.ExecutionErrorHandlerInterceptor.execute(ExecutionErrorHandlerInterceptor.java:52)
at deployment.kie-server.war//org.jbpm.runtime.manager.impl.error.ExecutionErrorHandlerInterceptor.execute(ExecutionErrorHandlerInterceptor.java:29)
at deployment.kie-server.war//org.drools.persistence.PersistableRunner.execute(PersistableRunner.java:400)
at deployment.kie-server.war//org.drools.persistence.PersistableRunner.execute(PersistableRunner.java:68)
at deployment.kie-server.war//org.drools.core.runtime.InternalLocalRunner.execute(InternalLocalRunner.java:37)
at deployment.kie-server.war//org.drools.core.runtime.InternalLocalRunner.execute(InternalLocalRunner.java:41)
at deployment.kie-server.war//org.drools.core.command.impl.CommandBasedStatefulKnowledgeSession$1.completeWorkItem(CommandBasedStatefulKnowledgeSession.java:172)
at deployment.kie-server.war//org.jbpm.services.task.wih.ExternalTaskEventListener.processTaskState(ExternalTaskEventListener.java:66)
at deployment.kie-server.war//org.jbpm.services.task.wih.ExternalTaskEventListener.afterTaskCompletedEvent(ExternalTaskEventListener.java:112)
at deployment.kie-server.war//org.jbpm.services.task.events.TaskEventSupport.lambda$fireAfterTaskCompleted$27(TaskEventSupport.java:228)
at deployment.kie-server.war//org.drools.core.event.AbstractEventSupport.notifyAllListeners(AbstractEventSupport.java:63)
at deployment.kie-server.war//org.jbpm.services.task.events.TaskEventSupport.fireAfterTaskCompleted(TaskEventSupport.java:228)
at deployment.kie-server.war//org.jbpm.services.task.internals.lifecycle.MVELLifeCycleManager.taskOperation(MVELLifeCycleManager.java:411)
at deployment.kie-server.war//org.jbpm.services.task.impl.TaskInstanceServiceImpl.complete(TaskInstanceServiceImpl.java:191)
at deployment.kie-server.war//org.jbpm.services.task.commands.CompleteTaskCommand.execute(CompleteTaskCommand.java:98)
at deployment.kie-server.war//org.jbpm.services.task.commands.CompleteTaskCommand.execute(CompleteTaskCommand.java:42)
at deployment.kie-server.war//org.jbpm.services.task.commands.CompositeCommand.execute(CompositeCommand.java:146)
at deployment.kie-server.war//org.jbpm.services.task.commands.TaskCommandExecutorImpl$SelfExecutionCommandService.execute(TaskCommandExecutorImpl.java:80)
at deployment.kie-server.war//org.jbpm.services.task.commands.TaskCommandExecutorImpl$SelfExecutionCommandService.execute(TaskCommandExecutorImpl.java:65)
at deployment.kie-server.war//org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:39)
at deployment.kie-server.war//org.jbpm.services.task.persistence.TaskTransactionInterceptor.execute(TaskTransactionInterceptor.java:88)
at deployment.kie-server.war//org.jbpm.services.task.persistence.TaskTransactionInterceptor.execute(TaskTransactionInterceptor.java:49)
at deployment.kie-server.war//org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:39)
at deployment.kie-server.war//org.drools.persistence.jta.TransactionLockInterceptor.execute(TransactionLockInterceptor.java:73)
at deployment.kie-server.war//org.drools.persistence.jta.TransactionLockInterceptor.execute(TransactionLockInterceptor.java:45)
at deployment.kie-server.war//org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:39)
at deployment.kie-server.war//org.drools.persistence.jpa.OptimisticLockRetryInterceptor.internalExecute(OptimisticLockRetryInterceptor.java:102)
at deployment.kie-server.war//org.drools.persistence.jpa.OptimisticLockRetryInterceptor.execute(OptimisticLockRetryInterceptor.java:83)
at deployment.kie-server.war//org.drools.persistence.jpa.OptimisticLockRetryInterceptor.execute(OptimisticLockRetryInterceptor.java:44)
at deployment.kie-server.war//org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:39)
at deployment.kie-server.war//org.jbpm.runtime.manager.impl.error.ExecutionErrorHandlerInterceptor.internalExecute(ExecutionErrorHandlerInterceptor.java:66)
at deployment.kie-server.war//org.jbpm.runtime.manager.impl.error.ExecutionErrorHandlerInterceptor.execute(ExecutionErrorHandlerInterceptor.java:52)
at deployment.kie-server.war//org.jbpm.runtime.manager.impl.error.ExecutionErrorHandlerInterceptor.execute(ExecutionErrorHandlerInterceptor.java:29)
at deployment.kie-server.war//org.drools.core.runtime.InternalLocalRunner.execute(InternalLocalRunner.java:37)
at deployment.kie-server.war//org.drools.core.runtime.InternalLocalRunner.execute(InternalLocalRunner.java:41)
at deployment.kie-server.war//org.jbpm.services.task.commands.TaskCommandExecutorImpl.execute(TaskCommandExecutorImpl.java:49)
at deployment.kie-server.war//org.jbpm.services.task.impl.command.CommandBasedTaskService.complete(CommandBasedTaskService.java:176)
at deployment.kie-server.war//org.jbpm.runtime.manager.impl.task.SynchronizedTaskService.complete(SynchronizedTaskService.java:118)
at deployment.kie-server.war//org.jbpm.kie.services.impl.UserTaskServiceImpl.complete(UserTaskServiceImpl.java:230)
at deployment.kie-server.war//org.kie.server.services.jbpm.UserTaskServiceBase.complete(UserTaskServiceBase.java:112)
at deployment.kie-server.war//org.kie.server.remote.rest.jbpm.UserTaskResource.complete(UserTaskResource.java:258)
at jdk.internal.reflect.GeneratedMethodAccessor180.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)