Java uses 100% CPU on Linux
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Java
On my Linux server, any Java program (even "Hello world") uses 100% CPU and is very slow ID does not depend on the Java version. I have tried different versions of openjdk and sun JDK, both of which behave the same How can I solve this problem?
Solution
I found the solution in this article http://blog.wpkg.org/2012/07/01/java-leap-second-bug-30-june-1-july-2012-fix/
This is a good opportunity, which is caused by the leap second kernel bug First, check the following in dmesg
[10703552.860274] Clock: inserting leap second 23:59:60 UTC
To fix it, first stop the NTP client On Debian like systems
/etc/init.d/ntp stop
Store current time
date -s Now
And test Java If everything is OK, try restarting the NTP service
/etc/init.d/ntp start
And test it again
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