2020-03-10 14:48:53,828 ERROR jbpm.workitem.handler.AsyncWorkItemHandlerListener: Error when handling callback from executor
java.lang.NullPointerException: null
at org.jbpm.persistence.ExceptionCommand.execute(ExceptionCommand.java:52) ~[jbpm-jcr-persistence-6.0-SNAPSHOT.jar:?]
at org.jbpm.persistence.ExceptionCommand.execute(ExceptionCommand.java:35) ~[jbpm-jcr-persistence-6.0-SNAPSHOT.jar:?]
at org.drools.core.fluent.impl.PseudoClockRunner.executeBatch(PseudoClockRunner.java:102) ~[drools-core-7.33.0.Final.jar:7.33.0.Final]
at org.drools.core.fluent.impl.PseudoClockRunner.executeBatches(PseudoClockRunner.java:69) ~[drools-core-7.33.0.Final.jar:7.33.0.Final]
at org.drools.core.fluent.impl.PseudoClockRunner.execute(PseudoClockRunner.java:61) ~[drools-core-7.33.0.Final.jar:7.33.0.Final]
at org.drools.core.fluent.impl.PseudoClockRunner.execute(PseudoClockRunner.java:39) ~[drools-core-7.33.0.Final.jar:7.33.0.Final]
at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:39) ~[drools-core-7.33.0.Final.jar:7.33.0.Final]
at org.drools.persistence.SimpleSessionCommandService$TransactionInterceptor.execute(SimpleSessionCommandService.java:360) ~[drools-jcr-persistence-6.0-SNAPSHOT.jar:7.33.0.Final]
at org.drools.persistence.SimpleSessionCommandService$TransactionInterceptor.execute(SimpleSessionCommandService.java:326) ~[drools-jcr-persistence-6.0-SNAPSHOT.jar:7.33.0.Final]
at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:39) ~[drools-core-7.33.0.Final.jar:7.33.0.Final]
at org.drools.persistence.jcr.JcrPersistInterceptor.execute(JcrPersistInterceptor.java:51) ~[drools-jcr-persistence-6.0-SNAPSHOT.jar:?]
at org.drools.persistence.jcr.JcrPersistInterceptor.execute(JcrPersistInterceptor.java:41) ~[drools-jcr-persistence-6.0-SNAPSHOT.jar:?]
at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:39) ~[drools-core-7.33.0.Final.jar:7.33.0.Final]
at org.jbpm.persistence.JcrPersistProcessInterceptor.execute(JcrPersistProcessInterceptor.java:59) ~[jbpm-jcr-persistence-6.0-SNAPSHOT.jar:?]
at org.jbpm.persistence.JcrPersistProcessInterceptor.execute(JcrPersistProcessInterceptor.java:48) ~[jbpm-jcr-persistence-6.0-SNAPSHOT.jar:?]
at org.drools.persistence.SimpleSessionCommandService.execute(SimpleSessionCommandService.java:218) ~[drools-jcr-persistence-6.0-SNAPSHOT.jar:7.33.0.Final]
at org.drools.persistence.SimpleSessionCommandService.execute(SimpleSessionCommandService.java:60) ~[drools-jcr-persistence-6.0-SNAPSHOT.jar:7.33.0.Final]
at org.drools.core.runtime.InternalLocalRunner.execute(InternalLocalRunner.java:37) ~[drools-core-7.33.0.Final.jar:7.33.0.Final]
at org.drools.core.runtime.InternalLocalRunner.execute(InternalLocalRunner.java:41) ~[drools-core-7.33.0.Final.jar:7.33.0.Final]
at org.drools.core.command.impl.CommandBasedStatefulKnowledgeSession.execute(CommandBasedStatefulKnowledgeSession.java:533) ~[drools-core-7.33.0.Final.jar:7.33.0.Final]
at info.magnolia.module.workflow.jbpm.workitem.handler.AsyncWorkItemHandlerListener.onFailure(AsyncWorkItemHandlerListener.java:105) [magnolia-module-workflow-jbpm-6.0-SNAPSHOT.jar:?]
at info.magnolia.module.workflow.jbpm.workitem.handler.AsyncWorkItemHandlerListener.jobWasExecuted(AsyncWorkItemHandlerListener.java:72) [magnolia-module-workflow-jbpm-6.0-SNAPSHOT.jar:?]
at org.quartz.core.QuartzScheduler.notifyJobListenersWasExecuted(QuartzScheduler.java:1967) [quartz-2.3.2.jar:?]
at org.quartz.core.JobRunShell.notifyJobListenersComplete(JobRunShell.java:340) [quartz-2.3.2.jar:?]
at org.quartz.core.JobRunShell.run(JobRunShell.java:224) [quartz-2.3.2.jar:?]
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:573) [quartz-2.3.2.jar:?]