open

※ Config

<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        ......

        <property name="quartzProperties">
            <props>
                <prop key="org.quartz.threadPool.threadCount">3</prop>
            </props>
        </property>

</bean>

※ 디폴트

 Thread Count = 10

※ 참조

• http://stackoverflow.com/questions/2730354/spring-scheduler-shutdown-error
• http://forum.spring.io/forum/spring-projects/container/5043-simple-question-how-to-set-number-quartz-worker-threads