Caused by: java.lang.IllegalStateException: Encountered invalid @Scheduled method 'userRegPersist': Cron expression must consist of 6 fields (found 7 in "0 12 17 14 3 ? 2018")
  at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor.processScheduled(ScheduledAnnotationBeanPostProcessor.java:402)
  at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor$1.doWith(ScheduledAnnotationBeanPostProcessor.java:245)
  at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:524)
  at org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:504)
  at org.springframework.scheduling.annotation.ScheduledAnnotationBeanPostProcessor.postProcessAfterInitialization(ScheduledAnnotationBeanPostProcessor.java:240)
  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsAfterInitialization(AbstractAutowireCapableBeanFactory.java:422)
  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1583)
  at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
  ... 56 more

@Target({ElementType.METHOD, ElementType.ANNOTATION_TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Repeatable(Schedules.class)
public @interface Scheduled {
  /**
   * A cron-like expression, extending the usual UN*X definition to include
   * triggers on the second as well as minute, hour, day of month, month
   * and day of week.  e.g. {@code "0 * * * * MON-FRI"} means once per minute on
   * weekdays (at the top of the minute - the 0th second).
   * @return an expression that can be parsed to a cron schedule
   * @see org.springframework.scheduling.support.CronSequenceGenerator
   */
  String cron() default "";
}

/**
 * Date sequence generator for a
 * <a href="http://www.manpagez.com/man/5/crontab/">Crontab pattern</a>,
 * allowing clients to specify a pattern that the sequence matches.
 *
 * <p>The pattern is a list of six single space-separated fields: representing
 * second, minute, hour, day, month, weekday. Month and weekday names can be
 * given as the first three letters of the English names.
 *
 * <p>Example patterns:
 * <ul>
 * <li>"0 0 * * * *" = the top of every hour of every day.</li>
 * <li>"*/10 * * * * *" = every ten seconds.</li>
 * <li>"0 0 8-10 * * *" = 8, 9 and 10 o'clock of every day.</li>
 * <li>"0 0/30 8-10 * * *" = 8:00, 8:30, 9:00, 9:30 and 10 o'clock every day.</li>
 * <li>"0 0 9-17 * * MON-FRI" = on the hour nine-to-five weekdays</li>
 * <li>"0 0 0 25 12 ?" = every Christmas Day at midnight</li>
 * </ul>
 *
 * @author Dave Syer
 * @author Juergen Hoeller
 * @since 3.0
 * @see CronTrigger
 */
public class CronSequenceGenerator {}