title: Quartz Spring CronTrigger fired more times than configured
body: <p>I have a cronTrigger for a job "digestJob":</p>
  
  <pre><code>&lt;bean id="digestCronTrigger" class="org.springframework.scheduling.quartz.CronTriggerBean"&gt; 
      &lt;property name="jobDetail" ref="digestJob" /&gt;
      &lt;property name="cronExpression" value="0 35 15 * * ?" /&gt;
  &lt;/bean&gt;
  </code></pre>
  
  <p>Here is my schedulerFactoryBean configuration:</p>
  
  <pre><code>&lt;bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean"&gt;
          &lt;property name="triggers"&gt;
              &lt;list&gt;
                  &lt;ref bean="digestCronTrigger" /&gt;   
              &lt;/list&gt;
          &lt;/property&gt;
      &lt;/bean&gt;
  </code></pre>
  
  <p>The problem is, the digestCronTrigger is supposed to be fired ONCE everyday at 5:35 PM, but it is being fired TWICE at the specified time. However, when I use SimpleTrigger:</p>
  
  <pre><code>&lt;bean id="digestTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerBean"&gt;
          &lt;property name="jobDetail" ref="digestJob" /&gt;
          &lt;property name="startDelay" value="0" /&gt;
          &lt;property name="repeatInterval" value="10000" /&gt;
      &lt;/bean&gt;
  </code></pre>
  
  <p>everything works fine and the trigger is fired exactly once every 10 seconds. Why digestCronTrigger is being fired twice? Is there something wrong with my cron expression, or is there any property that I am missing? Any help will be much appreciated.</p>