linux - Is the Java version vulnerable to leap seconds? -


i want know if java build 1.7.0_51-b13 version vulnerable leap seconds or not?

i have cluster of servers running tomcat. since july 1 have huge cpu usage. tried stop ntp , date -s "date" in vain.

the redhat kernel , tzdata package patched since june.

useful links:

it's down implementation. it's unlikely jvm supports leap seconds.

from java.util.date documentation:

although date class intended reflect coordinated universal time (utc), may not exactly, depending on host environment of java virtual machine. modern operating systems assume 1 day = 24 × 60 × 60 = 86400 seconds in cases. in utc, however, once every year or 2 there second, called "leap second." leap second added last second of day, , on december 31 or june 30. example, last minute of year 1995 61 seconds long, added leap second. computer clocks not accurate enough able reflect leap-second distinction.

(out of interest, , not connected @ java, google ntp servers stretch seconds in day has leap second, time allocated linearly across seconds in day.)


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