Use of schedule expression start/end date for (Database) persistent calendar timers fail if the server is restarted and the timer reloaded ------------------------------------------------------------------------------------------------------------------------------------------ Key: WFLY-9054 URL: https://issues.jboss.org/browse/WFLY-9054 Project: WildFly Issue Type: Bug Components: EJB Affects Versions: 11.0.0.Alpha1 Environment: Oracle Database as datasource for timers <timer-service thread-pool-name="default" default-data-store="default-store"> <data-stores> <database-data-store name="default-store" datasource-jndi-name="jboss/datasources/OracleDatasource"/> </data-stores> </timer-service> Reporter: Wolf-Dieter Fink Labels: ejb, timers, timerservice If Calendar timers are created programatically it is possible to use the javax.ejb.ScheduleExpression and set start() end() as a Date. If the timer is persistent and the database is Oracle (here 12c ojdbc7 driver) a server restart will show the following Exception is: 13:55:00,450 WARN [org.jboss.as.ejb3.timer] (ServerService Thread Pool -- 63) WFLYEJB0161: Failed to reinstate timer 'ejb31-timer.ejb31-timer.SimpleScheduleSingletonTimerBean' (id=bd2e59a0-bdf6-43a1-9241-fd3a0b3a72da) 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:535) at org.jboss.as.ejb3.timerservice.persistence.database.DatabaseTimerPersistence.loadActiveTimers(DatabaseTimerPersistence.java:452) at org.jboss.as.ejb3.timerservice.TimerServiceImpl.getActivePersistentTimers(TimerServiceImpl.java:953) at org.jboss.as.ejb3.timerservice.TimerServiceImpl.restoreTimers(TimerServiceImpl.java:693) at org.jboss.as.ejb3.timerservice.TimerServiceImpl.activate(TimerServiceImpl.java:225) at org.jboss.as.ejb3.component.EJBComponent.start(EJBComponent.java:588) at org.jboss.as.ejb3.component.singleton.SingletonComponent.start(SingletonComponent.java:133) at org.jboss.as.ee.component.ComponentStartService$1.run(ComponentStartService.java:54) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:748) 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(Timestamp.java:237) at oracle.jdbc.driver.CharCommonAccessor.getTimestamp(CharCommonAccessor.java:415) ... 18 more As a result the timer seems created with a new id and the entry within the timer-table is duplicated.