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Java Application Time Sync Problem

By admin on Feb 15, 2009 in Java

JVM is default to calculate the current system date time using the number CPU ticks when it is started.

This may be a problem if you operating system is time synched. You may notice the JVM time is different from the OS time.

See below

http://forums11.itrc.hp.com/service/forums/questionanswer.do?admit=109447626+1234755920347+28353475&threadId=997540

http://www.javakb.com/Uwe/Forum.aspx/java-programmer/8471/HP-UX-Java-1-3-1-02-date-time-differences

One solution is to use -XX:+UseGetTimeOfDay but it may have performance impact.

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From Java: Time Synchronization Trick in Programming | twit88.com | Oct 14, 2009

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