Oracle【ORA-01513】ora-01513 invalid current time returned by operating system

Error: ORA-1513
Text: invalid current time returned by operating system
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Cause: The operating system returned a time that was not between the years
1988 and 2121.
Action: Correct the time kept by the operating system.

*** Important: The notes below are for experienced users - See Note:22080.1

Explanation:
Oracle expects the system date to be in the range 1988 to 2121.
If the O/S call we use to get the system date returns a
year value outside this range then ORA-1513 is signalled.

There should be no reason to ever set the system date to earlier than 1988.
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小结：本次事件是由于索贝的ntp服务器时间被篡改成1980年导致，而本地的Oracle服务器正是通过ntp同步ntp服务器才使得Oracle服务器系统时间也被同步成1980年，ASM实例瞬间crash，整个RAC环境无法提供服务，同时所有的RAC命令都无法运行，最快捷有效的方法就是注销crontab中的ntp定时同步脚本，正确修改Oracle数据库服务器，注意两个节点时间要同步，重启服务器。

----thank you & best regards