quartz如何保证任务不重复执行

properties: # quartz原生配置
      org:
        quartz:
          scheduler:
            instanceName: DcScheduler # 调度器实例名称
            instanceId: AUTO # 调度器实例ID自动生成
            makeSchedulerThreadDaemon: true
          # JobStore 相关配置
          jobStore:
            acquireTriggersWithinLock: true
            class: org.quartz.impl.jdbcjobstore.JobStoreTX # JobStore 实现类
            driverDelegateClass: org.quartz.impl.jdbcjobstore.StdJDBCDelegate # 使用完全兼容JDBC的驱动
            tablePrefix: qrtz_ # Quartz 表前缀
            useProperties: false # 是否将JobDataMap中的属性转为字符串存储
            isClustered: true
            clusterCheckinInterval: 5000

为什么添加了 acquireTriggersWithinLock: true ，任务还是会重复执行

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@DisallowConcurrentExecution
public class MyJob implements Job {
    public void execute(JobExecutionContext context) throws JobExecutionException {
        // code for job execution
    }
}