问题描述
JobDetail.requestsRecovery属性的文档规定以下内容
The documentation for JobDetail.requestsRecovery property states the following
现在，什么是恢复"情况或故障转移"情况?
Now, what is a 'recovery' situation or a 'fail-over' situation?
它们有何不同?
仅在JVM在作业执行过程中崩溃时才进行恢复吗，还是在作业由于异常而执行失败时才进行恢复?
Does the recovery happen only if the JVM crashes during job execution or does it happen if the job execution fails because of an exception also?
推荐答案
"恢复情况"是通用术语，一种恢复情况是"故障转移".
A "Recovery situation" is the generic term, one kind of recovery situation is the "fail-over".
故障转移是通常与冗余(例如群集)一起使用的容错系统所使用的过程.在集群中使用Quartz时会使用故障转移，并且 more Quartz的节点"存在.
A fail-over is a process used by fault-tolerance systems generally used with redundancy (e.g. clustering). Quartz use fail-over when is used in clustering and more Quartz "nodes" exists.
引用文档:
恢复情况是会导致硬关机"(即崩溃中正在运行的进程或计算机已关闭)的每种情况.
A recovery situation is every situation that produce an "Hard-shutdown" (i.e. the process it is running within crashes, or the machine is shut down).
要回答第二个问题:
-
如果JVM在作业执行过程中崩溃，则Quartz将恢复该作业
If the JVM crashes during a job execution > Quartz will recover the job
(因为崩溃是恢复情况)
(Because a crash is Recovery situation)
如果由于异常导致作业执行失败> Quartz将无法恢复作业
if the job execution fails because of an exception > Quartz will not recover the job
(由于异常不是强制关闭，因此会抛出 misfire )
(Because exception is not an hard-shutdown, a misfire is thrown instead)
请参见此激活工作恢复的答案.
See this answer to activate recovery for your jobs.
这篇关于石英作业详细要求恢复的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！