Quartz SchedulerFactoryBean异常--Spring自动装配惹的祸
Spring的配置文件，启用了自动装配模式：
<beans default-autowire="byName">
<bean id="dataSource" class="..."></bean>
<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean" lazy-init="false">
<property name="triggers">
<list><ref bean="clearLogsTrigger" /></list>
</property>
</bean>
...
</beans>
则此时会产生如下错误：
Error creating bean with name 'org.springframework.scheduling.quartz.SchedulerFactoryBean#0' defined in file [E:\workspace\eis_oracle2\web\WEB-INF\classes\conf\spring\eisSystemScheduleContext.xml]: Invocation of init method failed; nested exception is org.quartz.SchedulerConfigException: Failure occured during job recovery. [See nested exception: org.quartz.impl.jdbcjobstore.LockException: Failure obtaining db row lock: ORA-00942: table or view does not exist
原因：其实这都是Spring的自动装配惹得祸，当存在dataSource的bean，在初始化SchedulerFactoryBean时就自动装配该dataSource属性，此时就启用了jobstore的LocalDataSourceJobStore模式使用数据库来维持状态，quartz的jobstore会从数据库中查询任务。quartz使用数据库进行job状态的维护，但是在数据库中没有找到相应的table，从而无法正常初始化scheduler 。
解决：屏蔽掉自动装配，如下：
<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean" autowire="false">
<property name="triggers">
<list><ref bean="clearLogsTrigger" /></list>
</property>
</bean>
另：启用jobstore的RAMJobStore（内存存储的）模式，配置如下：
<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean" autowire="false">
<property name="triggers">
<list> <ref bean="clearLogsTrigger" /></list>
</property>
<property name="quartzProperties">
<props>
<prop key="org.quartz.jobStore.class">org.quartz.simpl.RAMJobStore</prop>
</props>
</property>
</bean>
当设置了dataSource属性，jobStore属性设置将无效，原因是：
mergedProps.put(StdSchedulerFactory.PROP_JOB_STORE_CLASS, LocalDataSourceJobStore.class.getName());
}
详细介绍请参见 SchedulerFactoryBean 方法 setDataSource(DataSource)的javadoc:
Set the default DataSource to be used by the Scheduler. If set, this will override corresponding settings inQuartz properties.
Note: If this is set, the Quartz settings should not define a job store "dataSource" to avoid meaningless double configuration.
A Spring-specific subclass of Quartz' JobStoreCMT will be used. It is therefore strongly recommended to perform all operations on the Scheduler within Spring-managed (or plain JTA) transactions. Else, database locking will not properly work and might even break (e.g. if trying to obtain a lock on Oracle without a transaction).
Supports both transactional and non-transactional DataSource access. With a non-XA DataSource and local Spring transactions, a single DataSource argument is sufficient. In case of an XA DataSource and global JTA transactions, SchedulerFactoryBean's "nonTransactionalDataSource" property should be set, passing in a non-XA DataSource that will not participate in global transactions.
