CustomNotificationListenerTes#testProcessEventListenerRegistration seems to fail from time to time

java.lang.RuntimeException: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: could not prepare statement
	at org.kie.spring.jbpm.services.SpringTransactionalCommandService.execute(SpringTransactionalCommandService.java:79)
	at org.jbpm.kie.services.impl.RuntimeDataServiceImpl.getProcessInstanceById(RuntimeDataServiceImpl.java:467)
	at org.jbpm.kie.services.impl.ProcessServiceImpl.abortProcessInstance(ProcessServiceImpl.java:236)
	at org.jbpm.springboot.samples.CustomNotificationListenerTest.testProcessEventListenerRegistration(CustomNotificationListenerTest.java:112)
	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:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
	at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
	at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
	at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:288)
	at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:282)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.lang.Thread.run(Thread.java:748)
Caused by: javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: could not prepare statement
	at org.hibernate.internal.ExceptionConverterImpl.convert(ExceptionConverterImpl.java:154)
	at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1515)
	at org.hibernate.query.Query.getResultList(Query.java:132)
	at org.jbpm.shared.services.impl.JpaPersistenceContext.queryStringWithParameters(JpaPersistenceContext.java:205)
	at org.jbpm.shared.services.impl.JpaPersistenceContext.queryWithParametersInTransaction(JpaPersistenceContext.java:61)
	at org.jbpm.shared.services.impl.commands.QueryNameCommand.execute(QueryNameCommand.java:50)
	at org.jbpm.shared.services.impl.TransactionalCommandService.execute(TransactionalCommandService.java:76)
	at org.kie.spring.jbpm.services.SpringTransactionalCommandService.execute(SpringTransactionalCommandService.java:74)
	... 22 more
Caused by: org.hibernate.exception.GenericJDBCException: could not prepare statement
	at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47)
	at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113)
	at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:186)
	at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:151)
	at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:2082)
	at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:2012)
	at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1990)
	at org.hibernate.loader.Loader.doQuery(Loader.java:949)
	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:351)
	at org.hibernate.loader.Loader.doList(Loader.java:2787)
	at org.hibernate.loader.Loader.doList(Loader.java:2770)
	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2604)
	at org.hibernate.loader.Loader.list(Loader.java:2599)
	at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:505)
	at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:395)
	at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:220)
	at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1526)
	at org.hibernate.query.internal.AbstractProducedQuery.doList(AbstractProducedQuery.java:1538)
	at org.hibernate.query.internal.AbstractProducedQuery.list(AbstractProducedQuery.java:1506)
	... 28 more
Caused by: java.sql.SQLException: Connection conn121: url=jdbc:h2:./target/spring-boot-jbpm user=SA is closed.
	at org.apache.commons.dbcp2.DelegatingConnection.checkOpen(DelegatingConnection.java:582)
	at org.apache.commons.dbcp2.DelegatingConnection.prepareStatement(DelegatingConnection.java:277)
	at org.apache.commons.dbcp2.DelegatingConnection.prepareStatement(DelegatingConnection.java:280)
	at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:149)
	at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:176)
	... 44 more