[GSS](7.0.z) java.lang.IllegalArgumentException: Timestamp format must be yyyy-mm-dd hh:mm:ss[.fffffffff] when javax.ejb.ScheduleExpression.start(java.util.Date s) was invoked

Customer use database store ejb timer service.
When customer restart the server after configuring belows, got the error during startup and the persisted timer was not recreated successfully.

~~~~~
<timer-service thread-pool-name="default" default-data-store="clustered-store">
<data-stores>
<database-data-store name="clustered-store" datasource-jndi-name="java:jboss/datasources/WebQuoteDS" database="oracle" refresh-interval="30000"/>
</data-stores>
</timer-service>
~~~~~

(error)
~~~~~
14:44:56,157 WARN [org.jboss.as.ejb3] (ServerService Thread Pool – 97) WFLYEJB0161: Failed to reinstate timer 'webquote.WQ_EJB_Utility.TaskScheduleManager' (id=633b0edf-1a14-4497-ae0b-64ca5523eff1) from its persistent state: java.sql.SQLException: Invalid conversion requested
at oracle.jdbc.driver.CharCommonAccessor.getTimestamp(CharCommonAccessor.java:420)
at oracle.jdbc.driver.T4CVarcharAccessor.getTimestamp(T4CVarcharAccessor.java:644)
at oracle.jdbc.driver.GeneratedStatement.getTimestamp(GeneratedStatement.java:360)
at oracle.jdbc.driver.GeneratedScrollableResultSet.getTimestamp(GeneratedScrollableResultSet.java:1008)
at org.jboss.jca.adapters.jdbc.WrappedResultSet.getTimestamp(WrappedResultSet.java:2140)
at org.jboss.as.ejb3.timerservice.persistence.database.DatabaseTimerPersistence.timerFromResult(DatabaseTimerPersistence.java:533)
at org.jboss.as.ejb3.timerservice.persistence.database.DatabaseTimerPersistence.loadActiveTimers(DatabaseTimerPersistence.java:458)
at org.jboss.as.ejb3.timerservice.TimerServiceImpl.getActivePersistentTimers(TimerServiceImpl.java:952)
at org.jboss.as.ejb3.timerservice.TimerServiceImpl.restoreTimers(TimerServiceImpl.java:692)
at org.jboss.as.ejb3.timerservice.TimerServiceImpl.activate(TimerServiceImpl.java:225)
at org.jboss.as.ejb3.component.EJBComponent.start(EJBComponent.java:543)
at org.jboss.as.ejb3.component.stateless.StatelessSessionComponent.start(StatelessSessionComponent.java:114)
at org.jboss.as.ee.component.ComponentStartService$1.run(ComponentStartService.java:54) [wildfly-ee-7.0.0.GA-redhat-2.jar:7.0.0.GA-redhat-2]
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) [rt.jar:1.8.0_111]
at java.util.concurrent.FutureTask.run(Unknown Source) [rt.jar:1.8.0_111]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [rt.jar:1.8.0_111]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [rt.jar:1.8.0_111]
at java.lang.Thread.run(Unknown Source) [rt.jar:1.8.0_111]
at org.jboss.threads.JBossThread.run(JBossThread.java:320)
Caused by: java.lang.IllegalArgumentException: Timestamp format must be yyyy-mm-dd hh:mm:ss[.fffffffff]
at java.sql.Timestamp.valueOf(Unknown Source) [rt.jar:1.8.0_111]
at oracle.jdbc.driver.CharCommonAccessor.getTimestamp(CharCommonAccessor.java:415)
... 18 more
~~~~~
The error seems to be caused by trying to convert a "java.util.Date" object into "java.sql.Timestamp" and persist it into database.
javax.ejb.ScheduleExpression API only has one method "start(java.util.Date s) " so that's something you can't change.

I could see we need some patching to the scripts used to create tables and insert data. [1]

[1] http://www.mastertheboss.com/jboss-server/wildfly-8/creating-clustered-ejb-3-timers