question: I am using SimpleTrigger to schedule a job which is supposed to run indefinitely (repeat count -1). And i am using JDBC store to persist the job state in DB. But the trigger is firing for some intervals (in my case always 8) and goes to BLO…

SimpleTrigger should meet your scheduling needs if you need to have a job execute exactly once at a specific moment in time, or at a specific moment in time followed by repeats at a specific interval. For example, if you want the trigger to fire at e…

/** * Thread state for a thread blocked waiting for a monitor lock. * A thread in the blocked state is waiting for a monitor lock * to enter a synchronized block/method or * reenter a synchronized block/method after calling * {@link Object#wait() Obj…

Doc说明: /** * Thread state for a thread blocked waiting for a monitor lock. * A thread in the blocked state is waiting for a monitor lock * to enter a synchronized block/method or * reenter a synchronized block/method after calling * {@link Object#wai…

刚才在看CSDN的问答时.发现这个问题. 原问题的作者是在观察jstack的输出时提出的疑问.那么BLOCKED和WAITING有什么差别呢? 答复在JDK源代码中能够找到,例如以下是java.lang.Thread.State类的一部分凝视. /** * Thread state for a thread blocked waiting for a monitor lock. * A thread in the blocked state is waiting for a monitor lo…

Cross-origin plugin content from  must have a visible size larger than 400 x 300 pixels, or it will be blocked. Invisible content is always blocked. 这儿找到了答案: https://stackoverflow.com/questions/47364531/chrome-cross-origin-plugin-content-from-must-ha…

scheduler.start()是Quartz的启动方式!下面进行分析,方便自己查看! 我都是分析的jobStore 方式为jdbc的SimpleTrigger!RAM的方式类似分析方式! Quartz学习--QuartzSchedulerThread.run 源码分析:http://blog.csdn.net/u010648555/article/details/53525041 解释: {0} : 表的前缀 ,如表qrtz_trigger ,{0}== qrtz_ {1} :quartz.…

内存存储RAMJobStore Quartz默认使用RAMJobStore,它的优点是速度.因为所有的 Scheduler 信息都保存在计算机内存中,访问这些数据随着电脑而变快.而无须访问数据库或IO等操作,但它的缺点是将 Job 和 Trigger 信息存储在内存中的.因而我们每次重启程序,Scheduler 的状态,包括 Job 和 Trigger 信息都丢失了.Quartz 的内存 Job 存储的能力是由一个叫做 org.quartz.simple.RAMJobStore 类提供.在我们的…

郑重声明,版权所有! 转载需说明. FREERTOS堆栈大小的单位是word,不是byte. 根据处理器架构优化系统的任务优先级不能超过32,If the architecture optimized method is used then configMAX_PRIORITIES cannot be greater than 32. vTaskDelay() delay from call the vTaskDelay vTaskDelayUntil delay from last wake…

多线程:(百度百科借一波定义) 多线程(英语:multithreading),是指从软件或者硬件上实现多个线程并发执行的技术.具有多线程能力的计算机因有硬件支持而能够在同一时间执行多于一个线程,进而提升整体处理性能.具有这种能力的系统包括对称多处理机.多核心处理器以及芯片级多处理(Chip-level multithreading)或同时多线程(Simultaneous multithreading)处理器. 在一个程序中,这些独立运行的程序片段叫作"线程"(Thread),利用它编程…