Hibernate Optimistic Locking error when running many jobs at the same time

org.quartz.JobExecutionException: The job was not completed. A system error occurred while running it. [See nested exception: org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Object of class [com.jaspersoft.jasperserver.api.engine.scheduling.hibernate.PersistentReportJobAlert] with identifier [2241]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [com.jaspersoft.jasperserver.api.engine.scheduling.hibernate.PersistentReportJobAlert#2241]]
at com.jaspersoft.jasperserver.api.engine.scheduling.quartz.ReportExecutionJob.throwJobExecutionException(ReportExecutionJob.java:416)
at com.jaspersoft.jasperserver.api.engine.scheduling.quartz.ReportExecutionJob.checkExceptions(ReportExecutionJob.java:408)
at com.jaspersoft.jasperserver.api.engine.scheduling.quartz.ReportExecutionJob.executeAndSendReport(ReportExecutionJob.java:644)
at com.jaspersoft.jasperserver.api.engine.scheduling.quartz.ReportExecutionJob.execute(ReportExecutionJob.java:279)
at com.jaspersoft.ji.report.options.engine.ReportOptionsExecutionJob.execute(ReportOptionsExecutionJob.java:47)
at org.quartz.core.JobRunShell.run(JobRunShell.java:213)
at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:557)
Caused by: org.springframework.orm.hibernate3.HibernateOptimisticLockingFailureException: Object of class [com.jaspersoft.jasperserver.api.engine.scheduling.hibernate.PersistentReportJobAlert] with identifier [2241]: optimistic locking failed; nested exception is org.hibernate.StaleObjectStateException: Row was updated or deleted by another transaction (or unsaved-value mapping was incorrect): [com.jaspersoft.jasperserver.api.engine.scheduling.hibernate.PersistentReportJobAlert#2241]
at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:683)

Resolution:

Try adding these properties to WEB-INF/js.quartz.base.properties and set them to "true"

org.quartz.jobStore.txIsolationLevelSerializable
org.quartz.jobStore.acquireTriggersWithinLock