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From Mina Naguib <>
Subject High CPU usage as of 8pm eastern time
Date Sun, 01 Jul 2012 03:11:14 GMT

Hi folks

Our cassandra (and other java-based apps) started experiencing extremely high CPU usage as
of 8pm eastern time (midnight UTC).

The issue appears to be related to specific versions of java + linux + ntpd

There are many solutions floating around on IRC, twitter, stackexchange, LKML.

The simplest one that worked for us is simply to run this command on each affected machine:

date; date `date +"%m%d%H%M%C%y.%S"`; date;

CPU drop was instantaneous - there was no need to restart the server, ntpd, or any of the
affected JVMs.

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